I don't know if you will get this comment being 4 years late to the party but it is great. You Sir are an outstanding teacher. I like to think I know what I am talking about having been rewarded for my teaching in the Navy. And this is the first explanation of a two stoke engine I have ever seen. Thank you ever so much.
Thanks for showing this! I have not seen the Power Products engines before. I love the all aluminium design and the style is very pleasing to the eye. The old Saab is fascinating. I have worked on 80's and 90's Saab cars which had more or less conventional 4-stroke engines. Didn't know such a thing as that existed! Almost looks like a Jet-Ski engine in there.
This one's right up my ally, Mr. Pete. I own ONLY 2 stroke Lawn-Boy mowers. More than I will admit to in fact. The last 2 stroke mower they made was in 2003 I believe, though they still have 2 stroke snow blowers that they farmed out to Tecumseh and Briggs for the engines under license from Toro. As long as you use the right gas/oil mix and clean the ports every other year or so, they'll just keep going. I've been mowing this season with a 1965 tan cast aluminum deck LB that was the 1st mower I ever used that I inherited from my uncle who inherited it from my grandmother who inherited it from my grandfather who bought it new in 1965, and a 1970 cast magnesium deck LB. They still run great and are light as a feather to mow with. The wheels were wobbly so I drilled them out and pressed in bronze bushings. I have yet to have to pull the starter rope more than once per start. Prime 4 times, pull the rope and mow. The under deck mufflers make them quiet too. As for the ports, I think it's worth noting that the exhaust port gets uncovered by the piston a smidgen before the intake port to ensure the crankcase pressure is higher than the now depressurized cylinder. Love these things for their simplicity and power to weight ratio. It'd be neat to get one of those Power Products engines running so you can show the youngsters how to start with a rope winder. Used to be that even after the recoils had been around for many years they still had a rope notch in the starter cup under the recoil just in case. Thanks for the video, Sir!
I never cared too much for 2 strokes, but sure glad my chainsaw has one. I once had a power products 2 stroker. You mentioned Lawson, I have one with an unusual cam, with only one lobe, it operates the exhaust valve then the intake. Thanks for another great lecture.
Mr. Pete That power products engine brought back childhood memories my dad had an old reel type push mower he also had a nice basement machine shop with a 9 inch QC South Bend Lathe. Back in the late 40s early 50's gas mowers were expensive so he bought a power products 2 stroke just like yours except it was a 1 piece gas tank and he retro-fitted and made some custom parts to adapt it to the reel push mower . About 10-12 years later he bought a rotary mower and scrapped the motorized reel mower but he kept the engine and let me tinker with it as a boy. Thanks for the memories , ~Rob~
fantastic video on the neat little engines and the machining on them is amazing. We still can't get along without the little two stroke engines. thanks for your time on this.
Ian Butler Im not an Angry broad. I watch all his videos and appreciate his knowledge and generation. However I thought the woman comment was tasteless. Does it mean Im angry... no. Does it mean I hate the guy...no. Is he and everyone else entitled to their opinions... yes. I hope he does continue his videos and i look forward to them and I will say I wish more people were like him in giving there knowledge and wisdom so freely. without people like him I wouldn't know as much as I know so thank you Mr. Pete.
It would be interesting to see the when the intake and exhaust ports opened by having a light like a small LED in the ports that once the piston traveled past it would light up the cylinder. A small red and green one would show which opened first. Thanks for the video. I enjoy your channel.
Another great video on the fundamentals. R.I.P. Craftsman 2-stroke Trimmer 2010-2012. Ran with straight gas to save a trip to the store, quit running that summer and now it runs no more. Taken apart and put back together, ran for a minute and then quit forever!
mr pete at 21:18 you said in the book they didnt show the valves or the springs or tapet, but above the crank there is a spring, and a valve with a tapet on the end. love this series keep it up, looking forward to maybe videos for ac and dc motors
You know, Mr. Pete, I meant to mention this back when I originally watched this video...the "handlebar cam" made me laugh out loud! Wonderful perspective...thanks for the laugh!
Great video. Higher performance 2-strokes use an expansion chamber. Pulses set up within the chamber help to scavenge the chamber and draw in more fuel mixture. Then provide a back pulse that reduces loss of the fuel mixture through the exhaust port.
Lyle, my father had an old DKW, when he was young, right after he returned from WWII. (Or, was it before?) He'd pull in to a gas station, and have the guy check the radiator, and oil level. As an air cooled 2 stroke, it had neither. Just looked it up, DKW ended up in East Germany after the war, so my father's was a pre-war model. Oh, THANKS for all your sends! steve
That engine looks really nice and it's done so neatly and clean, well, with the exception of the non removable head (or where one would be). I guess for someone with casting and or with enough know how modifying one to have a removable head would be a walk in the park. Cool video.
Mr Pete, I think you would find the exhaust ports open first so most of the combustion gasses could be vented prior to the transfer port opening. The shape of the ports and the shape of the dome of the piston were very important in clearing out the exhaust gasses and getting a fresh charge into the cylinder. I know of many cylinder and Pistons that were destroyed in attempt to "port" a two stroke for more power. You didn't mention expansion chambers as well I think that would be an interesting addition. Great video. Frank
I love Saabs! This particular model happens to be a Saab 96, according to the VIN at 5:37 and a Google search this was built in 1967, most likely October to December. The two strokes would burn up because they couldn't be run at a constant RPM or the motor wouldn't get the proper lubrication, so they had a freewheeling transmission. Often times the user would forget to engage the freewheeling transmission and coast it for 15 or 30 seconds (needed to allow the engine to become re-lubricated) and so the motor would overheat and cause bad wear and damage. Either that or the user would try to climb a hill at too high of a velocity, the rpms would be so great that the engine would loose it's lubrication before reaching the top of the hill.
Mr. Pete, My first motorcycle was a 50's era 250cc Zundapp. Great motor, but just be sure to blip the throttle occasionally when going down a real long steep grade if you were coasting, it was possible to seize the motor if you left it in gear, or didn't pull the clutch in. Tim
Hi, great video. I noticed at approximately the 21 min spot, you are comparing the 2 and 4 stroke engines in the book. You comment on how the picture does not show the valves and the tappets. Well there is a reason, it is showing a flat head engine. The lifter push rod and the valve are shown as one piece with the spring next to it. Keep up the great videos!
I really like looking at the complexity of the various castings. I can't imagine the work that it took to figure out and to make the molds and then cast them.
Nice video. The only thing I have found that is worse than leaving fuel in a carb over the winter, however, is not replacing the spark plug. I was amazed at the Saab 2 stroke.
70 to 73 Ford Thunderbird. One 2 cycle engine that does not fit the small category is the Detroit Diesel t series. Usually 8 cylinder semi truck or bus engine. Love the3 new series keep them coming. Suggestions manual transmissions, Hit and miss engines, or one that could be a sutg above the rest the difference between the newer rotary mowers and the old reel mowers. All you grammar Nazis that is the correct spelling.
Re cleaning the gas tank of your Vespa. A trick I learned decades ago from an old guy (long gone) who repaired mowers ...... Lawnboys in particular. Remove the gas tank and plug up the outlet. Put some clean pebbles in the gas tank (no grit on them). Add some gas. Put the gas cap back on. Shake, rattle, and roll the gas tank vigourously. Pour out the pebbles and the gas. Voila! Clean gas tank. Cleaned a lot of rusty old Lawnboy gas tanks that way.
Robert A Moore Yep, similar to what we used to do, but no pebbles. We used a mix of gaoline, lacquer thinner, acetone and WD-40 with BBs or ball bearings or in a pinch 1/4" nuts, later on we started using 1/4" ceramic balls. Five minutes of shaking in all directions followed by about 30 minutes of soak time followed by another five minutes of shaking then empty and rinse for a clean tank.
Hi Mr Pete, (note I first posted this incorrectly to the 4 stroke video) Love your work, great presentations which will now live on forever. Seems you left in a bit from 21:32 to 23:07 which should have ended up on the cutting room floor, as you start it over again. Keep up the good work :)
Two strokes diesel engines are also used in large ships. They run in both directions, because there is no gearbox but crankshaft is connected directly to the propeller. Compressed air is used for starting. They run in very low RPM range, starting from below 40, up to a little over 100 RPM. Very tough machines, running for weeks non-stop without any problems.
The Power Products M-1000 engine is a favorite of mine. Got one complete with tank like yours. The main jet mixture knob is missing. Appreciating your video contributions, thank you kindly.
Great video,thanks. SAAB went out of businesses a few years ago sadly. The Chinese bought the brand and have start to build eco powerd cars. Hybrid and electric here in Sweden for Asia marker. Grettings from sweden
"not really repairable and a throw away motor"... guess that means if I don't get it working after playing with it I just got to have some fun :) later on i'll be "fixing" a little two stroke from a tiny cheap chainsaw and if it doesn't work it will at least be the first time i've had an opportunity to fully disassemble one of these little things. thanks for giving me an inside look at how these work.
Mr Pete-You should investigate some of the large 2 cycle engines. The GMC/Detroit engines were 2 cycle with exhaust valves and a roots blower. The EMD diesel engines also had exhaust valves and a blower. Another 2 cycle diesel is the Fairbanks Morse opposed piston engine. Marv, EX auto shop teacher
You have been a good inspiration, thank you for your uniquely genuine humanity. Are you familiar with the one cycle stroke? Needless to say I use your videos to enhance my mental skills and put into practice the best Technics. Thanks for your efforts.
mrpete222 for about three years I have been researching this engine, it is extremely simple mechanically much like a 2 stroke cycle although the mixing chamber is eliminated, the crankcase holds oil, the engine must be any multiple of two cylinders. The connecting rods are solid to each piston as well as the unique rod bearings to the crankshaft. It is ported much like a 2 stroke cycle however the intake and compression strokes are symultainously achieved by each piston assembly fully at the end of each half stroke. "One hundred and right degrees out of phase."
You mentioned the depth of the cooling fins when you took out the section, and it got me thinking: in many of your casting videos, you emphasize the importance of pattern draft. Fins like that clearly don't have a normal draft on them; what sort of process or precaution do they use to produce those castings?
Excellent tutorial Mr. Pete. Thanks very much. Please explain a "hit & miss" engine functionality in due course. I am fasinated by stationary engines and the "hit & miss" is a sure favorite, however I cannot fully understand how they work ;-(.Best regards from Dublin, Ireland
I have to say that I use the pre-mixed fuel now myself because it is shelf-stable and won't gum up your chainsaw motor between seasons. They always warn against using "old gas" and I can't use a gallon of 2-cycle fuel in a typical year.
54 years ago there was a broken lawn mower in the weeds. I paid 50 cents, and resold the Power Products engine to my 11 year old cousin. He mounted the engine in mini bike and got it running.
2 cycle engines have the rings pinned so they do not rotate and snag in one of the ports. Most of your model airplane engines were 2 cycle with glo plugs instead of spark plugs which further simplified the operation. There was also diesel versions as well. In the late 60s the expansion chamber came into vogue. It operate on a sonic principle such that by the shape of the pipe it would suck out some of the fuel mixture and then the reflected exhaust pulse would cram that fuel/air/oil mixture back into the combustion chamber just as the piston rose and covered the exhaust port. Very high performance but peaky and bulky. In addition to reed valves there exists piston port 2 cycle engines (mainly motorcycles and chain saws) then there were rotary disk valves and even crankshaft valves. (mostly on model airplane glo plug engines.) Good video though.
Steve McEntyre Many snowblowers use the ported piston design. Lawn-Boy(Toro) branded R-Tek engines, I believe. Nearly the same engine as the Dura-Force mower engine except no reed valves.
Mr. Pete Just a comment you said in Characteristics of a 2 Stroke engine #7 Can operate in any position (depending on carb. and fuel tank)… That a 4 cycle can not do that… Well I believe (and no offense), that is a over simplification, because…. Yes indeed 4 cycles can run in any position, if equipped with a dry sump and oil pump, and fuel injection, as the do on airplanes, and race cars…. where you can not depend on gravity to feed ether. again No offense.. etc… Thanks Brian
Hi Mr. Pete. I agree that the pre-mixed gas is expensive. But it has an advantage beyond not needing mixing. It has no ethanol in it. In my experience, ethanol is deadly to two cycle engines. I have something like 9 two-cycle tools around the place, and for me, pre-mixed ETHANOL FREE gas has been a real improvement.
Mr. Pete, I used to own a 1964 SAAB 96 . I believe that the one in your video could ba a 1966 or 67. As I remember, the displacement was 830 cc and it put out about 40 HP
The car in the bushes is most definitely a third generation (74-76) Mercury Cougar. You can tell from the orientation of the slats on the headlights and the turn indicators on the far edges. The Montego does not have those turn lights.
Good explanation, thank you. I knew some of this before, but the piston top shape and why it is made that way was new, as were some other points. The cylinder casting is interesting...I was trying to figure out how they did it. Was the cylinder cast smooth and then milled to form the cooling fins, or did they use something like a core? Or was it a multi-part mold? -- Mike
Mr.Pete222, if I could make a correction on your thinking of Premix 2cycle fuel? I thought the same and also a way to make more money (and they do for that matter) but I buy the premix because of the quality of the fuel as well as NO ethanol content. I tested it too and doesn't appear to be any ethanol. Helps me for the long storage and it also has a additive so it will last for awhile (so far 3 years and still ignites).
Lyle, I wonder just how much better this little engine would run, utilizing an expansion chamber? en.wikipedia.org/wiki/Expansion_chamber I had twin expansion chambers on my old Yamaha RD-400, and that 35 pound engine put out 50 HP. Try that with a bike you can pick up off the ground. Both wheels off the dirt. I've got a weak expansion chamber on my bicycle, and it is too powerful to run at full throttle. (I get too many tickets.) At the risk of being rude, I don't care about the smoke. It's behind me. Oh, THANKS for the channel! steve
Hmm the 2 stroke I don't use that much if I can. Seems there is always problems of some sort. I actually like a battery system best yet to expensive to have and still lots of maintaining.
Appreciate your efforts. I remember the old washing machine motors around the farm in the 40's. I could never get one to run. My grandfather had a cement mixer powered by a single cylinder gasoline engine. As a kid, I spent a lot of hours feeding this thing. I think it controlled speed by firing the cylinder when needed. If you've ever been around one you know where the song "Cement Mixer Put-Ti Put-Ti" came from.
I wouldn't mind having that SAAB at all. Wonder if it is still there. I know what engine I would put it that little darling. Oh, and those premix cans of fuel are expensive and my wife uses it sometimes, although, it's about the only product anymore that comes in a metal can with a screw top that I repurpose.
Since you all think 2-strokes are inherently dirty, take a look at the new Evenrude E-TEC engines. They are cleaner than the 4 strokes. Yes, the old 2-strokes had high un-burned hydrocarbons. So the EPA went after the process, not the emissions. Typical government bureaucrats, outlaw something they don't understand.
They burn cleaner and quieter.I have several. The valves need occasional adjustment. I appreciate your curiosity and the need to quench others curiosity.
I cut my teeth on engines like these. Never worked on the power plus before. Actually I don't think I have ever seen them before. I think the connecting rod in those is likely bronze. Bronze makes a better bearing. If I am not mistaken some of the Maytag engines also used a bronze rod. Today the darn things have an aluminum rod. They are cheap an light.
Dictionary definition of motor: a machine, especially one powered by electricity or internal combustion, that supplies motive power for a vehicle or for some other device with moving parts. a source of power, energy, or motive force. "hormones are the motor of the sexual functions"
I don't know if you will get this comment being 4 years late to the party but it is great. You Sir are an outstanding teacher. I like to think I know what I am talking about having been rewarded for my teaching in the Navy. And this is the first explanation of a two stoke engine I have ever seen. Thank you ever so much.
I’m glad you liked it, that’s an old one. And I bet you were a great teacher in the Navy
Thanks for showing this! I have not seen the Power Products engines before. I love the all aluminium design and the style is very pleasing to the eye.
The old Saab is fascinating. I have worked on 80's and 90's Saab cars which had more or less conventional 4-stroke engines. Didn't know such a thing as that existed! Almost looks like a Jet-Ski engine in there.
This one's right up my ally, Mr. Pete. I own ONLY 2 stroke Lawn-Boy mowers. More than I will admit to in fact. The last 2 stroke mower they made was in 2003 I believe, though they still have 2 stroke snow blowers that they farmed out to Tecumseh and Briggs for the engines under license from Toro. As long as you use the right gas/oil mix and clean the ports every other year or so, they'll just keep going. I've been mowing this season with a 1965 tan cast aluminum deck LB that was the 1st mower I ever used that I inherited from my uncle who inherited it from my grandmother who inherited it from my grandfather who bought it new in 1965, and a 1970 cast magnesium deck LB. They still run great and are light as a feather to mow with. The wheels were wobbly so I drilled them out and pressed in bronze bushings. I have yet to have to pull the starter rope more than once per start. Prime 4 times, pull the rope and mow. The under deck mufflers make them quiet too. As for the ports, I think it's worth noting that the exhaust port gets uncovered by the piston a smidgen before the intake port to ensure the crankcase pressure is higher than the now depressurized cylinder. Love these things for their simplicity and power to weight ratio. It'd be neat to get one of those Power Products engines running so you can show the youngsters how to start with a rope winder. Used to be that even after the recoils had been around for many years they still had a rope notch in the starter cup under the recoil just in case. Thanks for the video, Sir!
blmeflmm66 Yes--I remember how quiet they were
I never cared too much for 2 strokes, but sure glad my chainsaw has one. I once had a power products 2 stroker. You mentioned Lawson, I have one with an unusual cam, with only one lobe, it operates the exhaust valve then the intake. Thanks for another great lecture.
Mr. Pete
That power products engine brought back childhood memories my dad had an old reel type push mower he also had a nice basement machine shop with a 9 inch QC South Bend Lathe. Back in the late 40s early 50's gas mowers were expensive so he bought a power products 2 stroke just like yours except it was a 1 piece gas tank and he retro-fitted and made some custom parts to adapt it to the reel push mower . About 10-12 years later he bought a rotary mower and scrapped the motorized reel mower but he kept the engine and let me tinker with it as a boy. Thanks for the memories , ~Rob~
Rob C Good story. Lots of those conversions were made back then
fantastic video on the neat little engines and the machining on them is amazing. We still can't get along without the little two stroke engines.
thanks for your time on this.
+Lee Waterman thanks
A late 60's Mercury Marquis
Great video, I never messed to much with 2 strokes, this little tutorial gave me some insight on their basic operation.
Excellent instructional video. I enjoyed the mini road trip. Thanks for sharing this "how it works" series. regards from the UK
+Gary C THANKS
Mr. Pete,
Ignore the annoying youtube critics and the angry broad. Great video. Thanks.
Ian Butler Thanks--I don't know what they want for nothing.
mrpete222 Very nice video! Thank you for the upload. Don't listen to any of the critics. You have a good way with words. I've subscribed!
Ian Butler Im not an Angry broad. I watch all his videos and appreciate his knowledge and generation. However I thought the woman comment was tasteless. Does it mean Im angry... no. Does it mean I hate the guy...no. Is he and everyone else entitled to their opinions... yes. I hope he does continue his videos and i look forward to them and I will say I wish more people were like him in giving there knowledge and wisdom so freely. without people like him I wouldn't know as much as I know so thank you Mr. Pete.
It would be interesting to see the when the intake and exhaust ports opened by having a light like a small LED in the ports that once the piston traveled past it would light up the cylinder. A small red and green one would show which opened first. Thanks for the video. I enjoy your channel.
Another great video on the fundamentals.
R.I.P. Craftsman 2-stroke Trimmer 2010-2012. Ran with straight gas to save a trip to the store, quit running that summer and now it runs no more. Taken apart and put back together, ran for a minute and then quit forever!
+Mark McCormack thanks
mr pete at 21:18 you said in the book they didnt show the valves or the springs or tapet, but above the crank there is a spring, and a valve with a tapet on the end.
love this series keep it up, looking forward to maybe videos for ac and dc motors
You know, Mr. Pete, I meant to mention this back when I originally watched this video...the "handlebar cam" made me laugh out loud! Wonderful perspective...thanks for the laugh!
Great video. Higher performance 2-strokes use an expansion chamber. Pulses set up within the chamber help to scavenge the chamber and draw in more fuel mixture. Then provide a back pulse that reduces loss of the fuel mixture through the exhaust port.
As always with your videos I learned a bunch of details about a topic I thought I understood.
Lyle, my father had an old DKW, when he was young, right
after he returned from WWII. (Or, was it before?)
He'd pull in to a gas station, and have the guy check the
radiator, and oil level. As an air cooled 2 stroke, it had neither.
Just looked it up, DKW ended up in East Germany after the war,
so my father's was a pre-war model.
Oh, THANKS for all your sends!
steve
I remeber those--smoked like crazy. The SAAB was also 2 stroke--but water cooled.
That engine looks really nice and it's done so neatly and clean, well, with the exception of the non removable head (or where one would be). I guess for someone with casting and or with enough know how modifying one to have a removable head would be a walk in the park.
Cool video.
Mr Pete, I think you would find the exhaust ports open first so most of the combustion gasses could be vented prior to the transfer port opening. The shape of the ports and the shape of the dome of the piston were very important in clearing out the exhaust gasses and getting a fresh charge into the cylinder. I know of many cylinder and Pistons that were destroyed in attempt to "port" a two stroke for more power. You didn't mention expansion chambers as well I think that would be an interesting addition.
Great video.
Frank
I love Saabs! This particular model happens to be a Saab 96, according to the VIN at 5:37 and a Google search this was built in 1967, most likely October to December.
The two strokes would burn up because they couldn't be run at a constant RPM or the motor wouldn't get the proper lubrication, so they had a freewheeling transmission. Often times the user would forget to engage the freewheeling transmission and coast it for 15 or 30 seconds (needed to allow the engine to become re-lubricated) and so the motor would overheat and cause bad wear and damage. Either that or the user would try to climb a hill at too high of a velocity, the rpms would be so great that the engine would loose it's lubrication before reaching the top of the hill.
+Jesse Crandle THANKS
I'm with Ian, Mr. Pete. Thanks, as always.
+dale pratt thanks
Mr. Pete,
My first motorcycle was a 50's era 250cc Zundapp. Great motor, but just be sure to blip the throttle occasionally when going down a real long steep grade if you were coasting, it was possible to seize the motor if you left it in gear, or didn't pull the clutch in.
Tim
Hi, great video. I noticed at approximately the 21 min spot, you are comparing the 2 and 4 stroke engines in the book. You comment on how the picture does not show the valves and the tappets. Well there is a reason, it is showing a flat head engine. The lifter push rod and the valve are shown as one piece with the spring next to it.
Keep up the great videos!
I really like looking at the complexity of the various castings. I can't imagine the work that it took to figure out and to make the molds and then cast them.
Fred Miller Thanks for watching
Nice video. The only thing I have found that is worse than leaving fuel in a carb over the winter, however, is not replacing the spark plug. I was amazed at the Saab 2 stroke.
Juan Rivero Thanks for watching
70 to 73 Ford Thunderbird. One 2 cycle engine that does not fit the small category is the Detroit Diesel t series. Usually 8 cylinder semi truck or bus engine. Love the3 new series keep them coming. Suggestions manual transmissions, Hit and miss engines, or one that could be a sutg above the rest the difference between the newer rotary mowers and the old reel mowers. All you grammar Nazis that is the correct spelling.
Thanks tubalcain! Very informative even for an old salt.
Re cleaning the gas tank of your Vespa. A trick I learned decades ago from an old guy (long gone) who repaired mowers ...... Lawnboys in particular. Remove the gas tank and plug up the outlet. Put some clean pebbles in the gas tank (no grit on them). Add some gas. Put the gas cap back on. Shake, rattle, and roll the gas tank vigourously. Pour out the pebbles and the gas. Voila! Clean gas tank.
Cleaned a lot of rusty old Lawnboy gas tanks that way.
Robert A Moore Yep, similar to what we used to do, but no pebbles.
We used a mix of gaoline, lacquer thinner, acetone and WD-40 with BBs or ball bearings or in a pinch 1/4" nuts, later on we started using 1/4" ceramic balls.
Five minutes of shaking in all directions followed by about 30 minutes of soak time followed by another five minutes of shaking then empty and rinse for a clean tank.
+Robert A Moore THANKS
Hi Mr Pete,
(note I first posted this incorrectly to the 4 stroke video)
Love your work, great presentations which will now live on forever.
Seems you left in a bit from 21:32 to 23:07 which should have ended up on the cutting room floor, as you start it over again.
Keep up the good work :)
+djamvideo THANKS
Two strokes diesel engines are also used in large ships. They run in both directions, because there is no gearbox but crankshaft is connected directly to the propeller. Compressed air is used for starting. They run in very low RPM range, starting from below 40, up to a little over 100 RPM. Very tough machines, running for weeks non-stop without any problems.
Yes, they are still widely used
I guess you could have been an auto shop teacher as well as a metal shop teacher. Thanks for the video.
cerberus Thanks for watching
Yes you made a very good presentation.
Mike
Oldvet1946 Thanks for watching
The Power Products M-1000 engine is a favorite of mine. Got one complete with tank like yours. The main jet mixture knob is missing. Appreciating your video contributions, thank you kindly.
👍
GREAT JOB MR. PETE ENJOYED IT VERY MUCH !!!
Great video,thanks.
SAAB went out of businesses a few years ago sadly. The Chinese bought the brand and have start to build eco powerd cars. Hybrid and electric here in Sweden for Asia marker.
Grettings from sweden
Jens Sköld Thanks for watching
Power Products is still around under the US Motor Power name. They make a 2 stroke almost identical to the old ones. The Hale Fyr Flote uses it.
"not really repairable and a throw away motor"... guess that means if I don't get it working after playing with it I just got to have some fun :) later on i'll be "fixing" a little two stroke from a tiny cheap chainsaw and if it doesn't work it will at least be the first time i've had an opportunity to fully disassemble one of these little things. thanks for giving me an inside look at how these work.
Mr Pete-You should investigate some of the large 2 cycle engines. The GMC/Detroit engines were 2 cycle with exhaust valves and a roots blower. The EMD diesel engines also had exhaust valves and a blower. Another 2 cycle diesel is the Fairbanks Morse opposed piston engine.
Marv, EX auto shop teacher
***** I've examined one of the big GM engines--with a sleeve pulled out. Seen the FM opposed in the submarine
Thanks for the video as always, you need to get one of those old engines going!
***** Thanks for watching
You have been a good inspiration, thank you for your uniquely genuine humanity. Are you familiar with the one cycle stroke? Needless to say I use your videos to enhance my mental skills and put into practice the best Technics. Thanks for your efforts.
No, I have never heard of a one-stroke
mrpete222 for about three years I have been researching this engine, it is extremely simple mechanically much like a 2 stroke cycle although the mixing chamber is eliminated, the crankcase holds oil, the engine must be any multiple of two cylinders. The connecting rods are solid to each piston as well as the unique rod bearings to the crankshaft. It is ported much like a 2 stroke cycle however the intake and compression strokes are symultainously achieved by each piston assembly fully at the end of each half stroke. "One hundred and right degrees out of phase."
You mentioned the depth of the cooling fins when you took out the section, and it got me thinking: in many of your casting videos, you emphasize the importance of pattern draft. Fins like that clearly don't have a normal draft on them; what sort of process or precaution do they use to produce those castings?
Excellent tutorial Mr. Pete. Thanks very much. Please explain a "hit & miss" engine functionality in due course. I am fasinated by stationary engines and the "hit & miss" is a sure favorite, however I cannot fully understand how they work ;-(.Best regards from Dublin, Ireland
I have to say that I use the pre-mixed fuel now myself because it is shelf-stable and won't gum up your chainsaw motor between seasons. They always warn against using "old gas" and I can't use a gallon of 2-cycle fuel in a typical year.
Great video, I have understood the theory, not you have shown me how it actually works, now it makes sense.
Thanks
Tony De Leo Thanks for watching
I had a two stroke for my first motorcycle. Everyone knew here I went as I left a trail of a blue haze behind me.
72 Mercury cougar. I enjoyed it the whole video.
***** Thanks
54 years ago there was a broken lawn mower in the weeds. I paid 50 cents, and resold the Power Products engine to my 11 year old cousin. He mounted the engine in mini bike and got it running.
Your cousin must have been pretty clever
I had a Vespa years ago it was a p150 great bike/scooter.. what cc is the one you have? great video by the way very well explained.. thankyou sir..
Kevin Willis mrpete will you be making a video of the spring winder? thankyou sir..
Great informative video! I'm going to guess early 70's Mercury Montego.
I drove a 2 cycle Saab in 1967, in Connecticut.
Thank you mr tubalcain this video set so much in my head,unfortunately i learned a whole lot wrong. :)
In Holland most gas stations have premixed straight from the pump, for all the scooters there.
Hi mrpete,
Well explained, thanks for a good tutorial, Pierre
pierre beaudry Thanks Pierre
Interesting how those 2 cycle engines work to port in and out.
ILGopher Thanks for watching
mrpete222: You missed one important thing on the list ' POPULAR APPLICATIONS OF 2-STROKE ENGINES'. Powered Para gliders and Ultralight aircraft.
2 cycle engines have the rings pinned so they do not rotate and snag in one of the ports.
Most of your model airplane engines were 2 cycle with glo plugs instead of spark plugs which further simplified the operation. There was also diesel versions as well. In the late 60s the expansion chamber came into vogue. It operate on a sonic principle such that by the shape of the pipe it would suck out some of the fuel mixture and then the reflected exhaust pulse would cram that fuel/air/oil mixture back into the combustion chamber just as the piston rose and covered the exhaust port. Very high performance but peaky and bulky. In addition to reed valves there exists piston port 2 cycle engines (mainly motorcycles and chain saws) then there were rotary disk valves and even crankshaft valves. (mostly on model airplane glo plug engines.) Good video though.
Steve McEntyre Many snowblowers use the ported piston design. Lawn-Boy(Toro) branded R-Tek engines, I believe. Nearly the same engine as the Dura-Force mower engine except no reed valves.
Steve McEntyre Thanks for watching
Mr. Pete Just a comment you said in Characteristics of a 2 Stroke engine #7 Can operate in any position (depending on carb. and fuel tank)…
That a 4 cycle can not do that…
Well I believe (and no offense), that is a over simplification, because….
Yes indeed 4 cycles can run in any position, if equipped with a dry sump and oil pump, and fuel injection, as the do on airplanes, and race cars…. where you can not depend on gravity to feed ether. again No offense.. etc…
Thanks
Brian
Hi Mr. Pete. I agree that the pre-mixed gas is expensive. But it has an advantage beyond not needing mixing. It has no ethanol in it. In my experience, ethanol is deadly to two cycle engines. I have something like 9 two-cycle tools around the place, and for me, pre-mixed ETHANOL FREE gas has been a real improvement.
Daniel Moerman Thanks for watching
Mr. Pete,
I used to own a 1964 SAAB 96 . I believe that the one in your video could ba a 1966 or 67. As I remember, the displacement was 830 cc and it put out about 40 HP
Bent Romnes THANKS
Simple, light and adaptable, you can tune them to pull from nothing or give 400 bhp per litre, what's not to like!
How many cooling fins get bent or broken by hammering on them to remove the cylinder?
those old saabs kinda look like them blue and yellow taxicabs in Saigon in 1968. Come to think of it, those were citroens I think.
The car in the bushes is most definitely a third generation (74-76) Mercury Cougar. You can tell from the orientation of the slats on the headlights and the turn indicators on the far edges. The Montego does not have those turn lights.
We're waiting for you to have a yard sale! :)
Good explanation, thank you. I knew some of this before, but the piston top shape and why it is made that way was new, as were some other points. The cylinder casting is interesting...I was trying to figure out how they did it. Was the cylinder cast smooth and then milled to form the cooling fins, or did they use something like a core? Or was it a multi-part mold?
-- Mike
+BigMjolnir thanks
Very well explained, thanks .
Adrian Higgins Thanks for watching
Mr.Pete222, if I could make a correction on your thinking of Premix 2cycle fuel? I thought the same and also a way to make more money (and they do for that matter) but I buy the premix because of the quality of the fuel as well as NO ethanol content. I tested it too and doesn't appear to be any ethanol. Helps me for the long storage and it also has a additive so it will last for awhile (so far 3 years and still ignites).
Points well taken, but it's very expensive. Around here I buy alcohol free gas for my off season engines
When prepping these for storage, all too often opening the drain screw leaves fuel in the carb. Best to remove bowl or other cover and invert.
Tomorrow can you demonstrate one of those 2 cycle engines running full throttle at say... 6:30 am? Those old engines are really neat
Power Products engines were the progenitors of Tecumseh's industrial 2-stroke engines.
+douro20 THANKS
the car is a 74 mercury cougar
That's what I was thinking
Was the M-150 actually 150 CC or 15 HP?
Great video.
Lyle, I wonder just how much better this
little engine would run, utilizing an expansion
chamber?
en.wikipedia.org/wiki/Expansion_chamber
I had twin expansion chambers on my old Yamaha
RD-400, and that 35 pound engine put out 50 HP.
Try that with a bike you can pick up off the ground.
Both wheels off the dirt.
I've got a weak expansion chamber on my bicycle,
and it is too powerful to run at full throttle. (I get
too many tickets.)
At the risk of being rude, I don't care about the smoke.
It's behind me.
Oh, THANKS for the channel!
steve
Hmm the 2 stroke I don't use that much if I can. Seems there is always problems of some sort. I actually like a battery system best yet to expensive to have and still lots of maintaining.
Thanks
Appreciate your efforts. I remember the old washing machine motors around the farm in the 40's. I could never get one to run.
My grandfather had a cement mixer powered by a single cylinder gasoline engine. As a kid, I spent a lot of hours feeding this thing. I think it controlled speed by firing the cylinder when needed. If you've ever been around one you know where the song "Cement Mixer Put-Ti Put-Ti" came from.
I was your old Maytag engines on the washing machine's. I have owned many of them. And they are a pain
I wouldn't mind having that SAAB at all. Wonder if it is still there. I know what engine I would put it that little darling.
Oh, and those premix cans of fuel are expensive and my wife uses it sometimes, although, it's about the only product anymore that comes in a metal can with a screw top that I repurpose.
lol
Great video, thank you.
Looks like a Mercury Cougar or Montego
+Pedro, Pedro THANKS
good video, хорошее полезное видео
wow. get off topic alot. Not criticizing. great videos
Since you all think 2-strokes are inherently dirty, take a look at the new Evenrude E-TEC engines. They are cleaner than the 4 strokes.
Yes, the old 2-strokes had high un-burned hydrocarbons. So the EPA went after the process, not the emissions. Typical government bureaucrats, outlaw something they don't understand.
I'm 15 and trying to learn as much as possible about engines can you please reply the exact name of that book I'd like to get one like it
Small Gas Engine Repair--22.95
search ebay or amazon
OK thank you
72 Mercury cougar?
SmallEngineMechanic thought you might like this
Andy Coakes Thanks for watching
Mercury montego?
Have you heard of Stihl 4Mix engines? It is 4stroke that requires mixed gas and oil.
Have not
They burn cleaner and quieter.I have several. The valves need occasional adjustment.
I appreciate your curiosity and the need to quench others curiosity.
great video.Thanks!!
My guess is a '73 Mercury Cougar Xr7. Also... you misspelled nuisance. :)
John Strange dint no thys waz a spelin be. LOL
I thought I saw a Saab emblem on that two stroke car.
Looks like a 74 Mercury Cougar
It looks like a Mercury Couger.
Cutlass".""?
Ford Marquis and the main con of a 2 stroke is the infernal racket they make :-/
The old driver says, Lincoln Mercury MkIV (4)
Mike C. Thanks for watching
I cut my teeth on engines like these. Never worked on the power plus before. Actually I don't think I have ever seen them before. I think the connecting rod in those is likely bronze. Bronze makes a better bearing. If I am not mistaken some of the Maytag engines also used a bronze rod. Today the darn things have an aluminum rod. They are cheap an light.
Junk Mikes World Thanks for watching
Do what makes it work: carburetors
The Reed valves resembles the old iron Cross hmmm...
adam raski Thanks for watching
Dictionary definition of motor:
a machine, especially one powered by electricity or internal combustion, that supplies motive power for a vehicle or for some other device with moving parts.
a source of power, energy, or motive force.
"hormones are the motor of the sexual functions"
I love the Saab...LOL
Daniel Hoffman Thanks for watching
enjoyed
+Andy Coakes THANKS