How to Diagnose Two-Cycle/Two-Stroke Engines
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- Опубліковано 29 сер 2011
- Mark is here to walk you through the steps needed when diagnosing your two-cycle engine issues. These steps will be the same for all the two-cycle tools in your lawn equipment fleet.
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Don't forget to LIKE and SHARE this video to help pass along helpful information to your friends! Your feedback and inquiries are also welcome so let us hear what you have to say with a comment below. - Навчання та стиль
This video should be required viewing for all High School students. Everyone should know these principles. They were presented in a clear, concise and easy to understand form. Thank you.
i could never smile as much as this guy while working on broken equipment lol...
I love how he used Carb Cleaner as Starter Fluid. Learn something everyday.
+1487G Yeah the active ingredient in Carb Cleaner is Heptane. Its pretty darn close to the active ingredient in modern starting fluid and it will get you out of a pinch. PB's rust buster also works. Never use WD-40 though.
Hey Mark,
Dont forget the kill switch wire that goes to the coil,Ive sometimes had those ground out making it seem like a bad coil,And sometimes the kill switch itself will be bad.
Knowledge is Power.
Mark, you do a BRILLIANT job with these videos! You obviously know your stuff and present the information exceptionally well! I've had a handful of gas trimmer problems and I know I can count on your videos and your friendly / cheerful disposition to solve my problems. eReplacementParts did a great job having you do these videos!
excellent. after playing around with engines for 50 years, and reading books, your video just made it all make sense, once and for all. thanks
Great videos mark! I'm trying to tackle my first small engine issue (weed eater) and your videos are by far the easiest to understand and the most helpful.
Thank you Mark, perfect balance between high level diagnosis and detailed direction. Add a sprinkling of common sense eg electric problem - replace the spark first
This made me more knowledgeable about, how to fix my machine. I am thank fore for this timely information.
Nice job! Good pace, good coverage, and good shots of the equipment.
This is of course the correct way to do it. Dang it if EVERY time I have a machine go down in the field, it is some obscure, deep hidden glitch. "The most common..." does not seem to apply in the real world.
Mark I work for The Home Depot as a tool tech I get a lot of parts from you guys, I find your videos very helpful. Thanks Slot Tim
Very useful and very informative. You manage to take a lot of the mystery out of these tasks and your explanations are simple and clear to understand, they are a great help, especially to the keen amateur. Thank you.
Thank you, this video was VERY clear and simple to follow. I've worked on my cars and on my bikes (very complicated!) and in my many years of doing lawn maintenance I've been hesitant to bother working on my equipment. Tbh, it was a huge job on my V4 Magna that convinced me a small 2 stroke was simple by comparison. :)
I am doing a lesson on two cycle engines for school and I thought that the information provided was very beneficial for any homeowner that uses any two cycle engine.
BRILLIANTLY MADE. CLEARLY EXPLAINED: THANKS FOR THE HELP :) I'LL BE BACK TO POST A QUESTION SHOULD I RUN INTO FURTHER DIFFICULTY AFTER TRYING THESE METHODS
Superb videos. You're very clear and well paced in your delivery and you smile a lot. :)
Mark, loved your thorough video on checking for problems for 2 cycle engines. I am going to use what you taught me to check for problems on my Poulan leaf blower. Thank you very much.
Thank you so much for your explicit explanation. Excellent presentation. Thanks for unselfishly sharing your knowledge.
This was just what I needed. I fixed my trimmer and leaf blower. Thanks for the valuable information.
Thanks for the clear, professional advice.
Thank you! We appreciate your business and words of praise.
-Mark
Very good video, Thank-you. Looks like I am heading down to Canadian Tire to buy some starter fluid. I like how you simplified your analytical approach in diagnosing the problem. Priceless! Cheers.
It sounds like there is still some debris in the carb. If you can get your hands on an ultrasonic cleaner they do wonders to clean stubborn carbs. You can also try using fishing line to clean the small passages in the carb. Never use anything metal though to clean. The metal will damage the fine passages and the carb will not work properly afterward.
I hope this helps,
-Mark
A well thought out and well organized tutorial.
Thank you.
thank you sir
you really really educated me on something I had no idea of.. but everyone else did.!
Hi Mark is pleasure to watching your video. Very useful and very nice presented. You got the skill to pass the knowledge to people! Gratulation!!
I have worked with 2-cycle engines for many years...But this video is most informative and helpful !!
This video is brilliant and very helpful. Very nice and professional presented
Loved the video straight forward and in depth and with a variety of equipment. You should do a video on how to increase the performance of a two stroke engine
Thank you so much for your advice.
Great video. Very well put together. Honestly I knew most of that info, but the way you put it, just made even more sense. Good job!!!!
very helpful. will start through the process and see how it goes. thanks
Mark dose a very good job getting through the process of 2 cycle engines i learned quite Thank you Douglas
thanks for a clear informative video, does the compression reading stay the same for bigger engine size ie lawnmower engines? thanks
Super video. Very informative & clear cut instructions. Thank you for separating the systems. Including the links was helpful.
Very logical step by step explanation to trouble shoot the problem. Needs the right tools to get the right result!
Excellent stuff. Thanks for taking the time. Placing my order for a carb now. Just wait to see how I manage to botch it... but the vid is still great! :)
Hey i know alot on 2 stroke engines i recently picked up some hedge cutters it is getting spark and the diaphragms in the car are in superb condition and it is quite rare isnt it for the fly wheel key to shear as its only hedge cutters
That was super helpful. Thanks! I'm glad this video exists! I wish I looked at it awhile ago!
I found this video to be very educational the way you broke up the analysis into a systematic approach. Wish I'd seen this a couple of years ago. Great job!
Cheers Mark, great vid.
Helpful. Diognosing a 2 stroke dirtbike now with the help of this vid. I am a first time owner an not super mech inclined.
I feel a lot better knowing about how to properly diagnose a prob
That was the best video ever, sir! Great teaching and explanations. I was about ready to just go buy a new trimmer. THANK YOU!!!!
Nice clear diagnostic video. Now to tear into my trimmer. Lots of little pieces‼️
Who's watching this 2020? Thank you, I'm fixing my trimmer, right now
Mark seems like a great person! Thanks.
That's a really good summary, Mark. I was interested to learn that you feel a spark tester is a more reliable index of adequate spark than is pulling a plug and grounding to chassis, and watching for spark there. But what if the plug is bad? If the plug is shorted then I would expect a spark tester to give a false positive, since current is flowing, albeit on an aberrant pathway. I' e never used a spark tester like yours but I'll consider getting one after watching this.
I have very poor hearing, and I found your video very clear. Also instructions were clear and straightforward, a great help, thank you!
Pat Nugent Since retiring, I have been fixing things that are broken. My sons are supplying me with various tools they own. Chainsaws, air compressors, weed eaters. I helped my oldest son fix an electric dryer and when he saw how simple it was, he has helped fix a couple for his friends. With the new smart phones (I don't own one) you can just get on UA-cam and punch in an appliance and most likely they have a video that will diagnose and tell you how to repair it, while you are standing next to the appliance, it is amazing! I fixed a non-working NuWave oven (cost $150) for less than two dollars!! Amazes me how many people throw things away that are fairly simple to fix. But I realize not everyone has the same interest or talents.
Steve Schuller so do you have the rest of the deck I am missing? Many say I ain't a playin' with a whole deck.
This is the best explained video on youtube great job.
Excellent! Got right to the point, but left me a bit confused as to what is indicated by too much compression. I'm guessing that could be friction/pitting from running too lean a mixture or gummy residue buildup?
Very good, clear speaking and the best school ever in youtube. That's simple like that!
I have a question about the spark tester, since it is inline with the sparkplug one must assume the sparkplug is new. I have here a sparkplug that is wide open when you measure it on a ohm meter and I thought my coil was bad.
Well done a lot of the help videos I see on UA-cam are filled with umm and it might be... but this has definitive answers thank you for your quality video!!
Great video.Concise and put in laymens terms.Thanks
Great videos. Very well written and informative.
Thanks for the helpful, methodical approach. I'll begin testing today.
Thanks for the videos they are very helpful.
great vid thanks mark. Working on cousins gas hedge trimmer Craftsman Bushwacker 21. It is older and I can't find manuals, and many parts not available. It was made by Homelite. Anyone know what the spark gap should be? Cleaned carb and still hard starting but carb adjustable once running. Cranks easily but seems to be slow to engage cutters. Could this be making it harder to start?
Well done nice video a very pleasant demeanor .
Informative steps in diagnosing a problem
Great video! On my weed eater, I experienced a low power condition with the engine, which was caused by a poorly sealing crankcase cover gasket on one occasion, & a carbon fouled muffler on another occasion. The poor crankcase seal resulted in low compression in the crankcase, which allowed the fuel air mix to leak out instead of going into the combustion chamber, & the carbon fouled muffler did not allow for good exhaust flow, thus reducing engine power.
Thank you for the class. Very helpful
Very well done. I've added you to my library.
Nice video!! Straight forward and clear instructions!!! Thanks!!
Really good video! Very pedagogical! Keep up the good work!
top video so easy to understand- a real skill in communicating
my prob is my strimmer will only run on half choke ay ideas?
cheers jo
Good info, I have repaired many 2 cycles but the compression info was new to me. Thanks
Very good information and very helpful. Thanks for taking the time to do these videos.
Thanks for the video. My Ryobi 700 trimmer 2stroke is really hard to pull and jerks back on the rope. It will start and run smooth. No carbon buildup where muffler connects to engine. Does this if I test pull with muffler off too. Pull string does retract okay. Just hard and jerky pulling. Any advice would be appreciated.
Brilliant video Mark. I have a Craftsman leaf blower (2-cycle) that is having a a compression of less than 70 pounds. I heard that engine restore lubricant can bring back compression back to normal. Can I use that in 2-cycle engines and if so where would I add the oil? Thanks in advance for your help...
Great info ,I own a stihl brush cutter and when I give it more throttle it doesn't seem to cut off or slow down,and when it starts the spool spins when I ain`t touching the throttle`so I adjust the throttle cable and it struggles to rotate fast and cuts out,any add vice please on these matter,owe yes I have checked the baffler and it seems it seems to be good,
You teach very well
Great video, however just wondering what can be done if engine starts, revs ok for a little but then slowly starts dying when revved? When I open the throttle it starts to die.
Mark loves his job
try cleaning the ignition coil works for me and it did
Thanks this video was very helpful!!
Mark, My trimmer does not start. I found it is very hard to pull the starter rope all the way up as usual. It liked having a spasm all the way ... However it is easy (or can say normal) to pull, if I remove the spark plug out. I've checked the spark plug, it worked fine.
So what went wrong with my trimmer? What should I do?
Thanks for the help. I have a Poulan 2150 chainsaw 36cc 2-stroke. Worked perfect 2 days then would not start the third. It appears to have spark and compression. Tried a new plug gapped to 0.020" but not a gig. I guess I will clean the carb, but starter fluid/carb cleaner did not work to fire it for even a second. The plug does appear to be wet with gas after I pull it a dozen times but I will clean it and the fuel filter too. I guess if that does not work I will try a spark tester.
good clear ,concise instructions thank you.
Helpful video! Thanks for good job!
great video, really helpful rather than guessing what the problem is.
Hi Mark i have a problem with a atlas copco jackhammer i have fitted new cylinder/piston/rings,coil,carburetta,,plug,vacuum holds 10 overnight,pressure holds 7 overnite,reed valve seems ok but it will not start at all
Thank you Mark , much appreciated .
thanks for such interesting video. These videos are an excellent marketing tool for your company. Please keep them up.
thank you for the video , it is helping me some knowledge about 2 stroke engine .
Great video . For a compression test is that tool used on the regular engine .
Most auto parts stores sell them. I purchased mine from my local Snap-on dealer. I think I payed about $15 for the one I use.
Thanks,
-Mark
Hi Mark, I think your videos are very intelligently presented. I have a question. If the engine starts when you spray starter fluid into the carburetor, then isn't the carburetor okay? Doesn't that mean that the problem is the delivery of the fuel TO the carburetor that's the problem? Thank you.
Awesome Video. My teen son in getting into small engine repair, this will be great for him. Thanks
Most auto parts stores offer ignition testers. I purchased mine from my local Snap-on dealer.
Thanks for watching,
-Mark
Very good video and information. Cheers
i have a husqvarna 128 L D weedeater it is about 2 years old. . it will run for about 15 seconds on full throttle and then dies. If if leave it on half chock it will run longer before it dies. I thought it may be a vacuum problem from the gas cap vent, so i removed the cap completely and still have the same problem. It was running great until one day the spark plug became loose. I removed the plug and found the plug was loose in the center of the plug. I install a new plug and ever since i have had the problem. Thanks for the video they are great
If you mean you still have the problem with a new plug, fuel pump (in the carb) I should think.
I suggest you service it at your nearest dumpster.
Hi! I have a yard machine weed trimmer and I can't get it started. I changed the spark plug and didn't start. I then noticed the primer bulb sticking and changed that. Still sticking when I push it in. I was going to change the fuel filter but I don't even see one in the tank. Not sure what to try now. Any suggestions would be appreciated. Great video! I wish I would have found this earlier before changing those parts. I've got to try spraying the carb cleaner and see if it fires. What else is left to change? Please help!
Great video. Very helpful in diagnosing small engines.
Well done - good information on diagnostics
Great video! What am I missing? Echo PB 200 blower. New spark plug and strong spark with Oppama tester, new carburetor, fresh gas 50:1, new fuel lines/filter, compression = 90+, spark arrestor clean. Get a pop with starter fluid, but can't get it running. Already bought a new one, just the challenge of trying figure this one out.
Duane Miller check you carb adjustment screws, or check the needle valve for proper operation. sounds like your not getting fuel. also if its an older model exhaust can build up soot from running improper oil mix clogging the muffler seen a few but not that common.
Thanks, Raguel Bauman. I agree, has to be a fuel issue - just can't find it yet. Gonna go back out there right now and go through the whole fuel system again.
+Duane Miller If only a pop, and not actually running, on starter fluid, may be timing is off.
+Duane Miller Try running it with the gas cap off. Does it run and stay running?
Any help appreciated. Have a petrol timberwolf strimmer. Fuel and spark seem ok. When i pull starter cord it fires but rips the cord out of my hand and doesnt start. Other videos seem to suggest a flywheel key. Not got that far on stripping down but could it be any other cause? cheers
My Husquvarna chainsaw needs a new recoil spring, I bought one on line and as you know it comes in a cassette, how do I install it on the saw?
Great information! Useful and educational.
W-40 is the best starter fluid for a two-cycle engine,with out risk of blowing it up or scoreing the rings,FYI,Good Video!