You have to be careful with the 4 stroke as there is two top dead center, you want the one when you move the fly wheel a bit the valves do not move. Go check Steve’s small engine saloon.
I am a stihl certified tech you are 100% correct on how to do that allso be careful when you put the new gasket on the cylinder there are little guides the gasket goes around and if it has over 15% blow by to clean the carbon out on a br430 there is a little mark on the flywheel
WITH ALL THE GOOD PRECISE THOROUGH INFO........YOU NEVER SAID WHAT SIZE THE THICKNESS GAGE IS,,,,,,,,,,,,,WHAT IS IT IN METRIC OR AMERICAN........THANKS..........
@@THEMOWERMEDIC1 maybe mine is different but on mine TDC is every other turn with the arrow lining up. its on intake with arrow lining up, the next time around its on trut TDC
I’ve got an older km110r and the last time I had the valve cover off it look extremely clean, I’ve always been very good about maintenance and it’s been a very dependable trimmer, it did seize a valve once but that was quick and easy to fix, I run 32:1 mix and I have no issues with carbon, I do run it wide open frequently.
@@THEMOWERMEDIC1 I did switch to syn oil a couple weeks ago, still 32:1 due to the fact that I run my machines wide open. Haven’t seized a valve ever since. I currently use hp ultra but will be switching to red armor soon
OK, good info. I have that problem. What feeler? It will take weeks till I can get that order to me for the kit. For the mean time what feeler? You can tell me in metric or sae. I've got both.
I will be doing some videos soon on the weed whackers..... I think I have a couple of videos on leaf blowers and weed eaters now, but I will get more in depth on some later..........
The 100rx I use at work seems kinda low on power. Idle is constantly different some days slow some a bit faster can’t get it turned down low enough for the head to stop turning without it sounding like it wants to die. It is at least a 8yrs unit and did have a new carb out on in 2017 also tune up, and valves adjusted, but as I can recall it only ran really good and properly for maybe 2 or 3 months by the next year it was acting similar to how i mentioned in beginning.
Best thing that happened to my 94 was when it got stolen. Only had it 3 weeks and I hated every minute. I keep fixing up my fs80 and wish they still made them
By saying make sure to adjust top dead center on the compression stroke not the intake by that do you mean in other words if I wiggle the flywheel back and forth the valves shouldn’t move at all? Then it’s on compression stroke if they move up n down it on the intake? That’s how I adjust adjust but did have issue with it not running that much different afterwords so I think it was because of not changing out the 2 sealing gaskets. Either that or that didn’t need adjusting I don’t think they need to done that often and Stihl doesn’t make it clear what all contributes to valves being out of adjustment.
I've had issues with the screws on the bottom engine pan backing out. make sure you check them everytime you adjust the valves. Has anyone else had this issue?
Great video. I have a question. So I had recently changed a cylinder head on my john deere jx75 mower with a 6 hp kawasaki engine and I did adjust the valves but I'm still getting too much compression. What could be causing this?
I agree with MM1 ............ Why did you change your head ???? Bad valves ???? What gap did you set at ??? I see you are in the lawn care biz and you got some wrench's under your belt I assume......... Comp releases or a common failure on Briggs cams on the single's .... I haven't seen one in my shop on a Kawi 6 HP though... Most Kawi's we have down here are on EX MARK and the higher end Zero Turn mowers........ Here in South Louisiana we have mostly Briggs on push style mowers...... Kohler Dis Courages LOL are getting frequent in the shop now with all kinds of issues with the bolts loosening up and cracked blocks.... What is your Model number on your engine ?? FC 150V ??
Boo LuQuette well I had gotten the mower for free but the carb bolt was broken when I got it. So to make it sound better and work better, I wanted to replace the head. I did gab the valves at .005 in as specified.
Could you please tell me where the exhaust valve is located on a Stihl FS 45, or if it even has an exhaust valve and/or intake valve on this 2 stroke engine? It is terribly hard to pull the starter.
set the valves correctly, TDC on compression stroke, but still extremely hard to turn over! what could be wrong?? i even checked the cam wheel to make sure timing was correct. it was!!! at a loss!!!!
You have to be careful with the 4 stroke as there is two top dead center, you want the one when you move the fly wheel a bit the valves do not move. Go check Steve’s small engine saloon.
you right!
I am a stihl certified tech you are 100% correct on how to do that allso be careful when you put the new gasket on the cylinder there are little guides the gasket goes around and if it has over 15% blow by to clean the carbon out on a br430 there is a little mark on the flywheel
Nicely done with good footage of keys points. Pace was perfect!!!
Thanks again!!
WITH ALL THE GOOD PRECISE THOROUGH INFO........YOU NEVER SAID WHAT SIZE THE THICKNESS GAGE IS,,,,,,,,,,,,,WHAT IS IT IN METRIC OR AMERICAN........THANKS..........
You forgot to mention that you want it on TDC on the compression stroke. TDC occurs twice on a four stroke in one complete cycle.
I didn’t forget anything. When you line up the arrow like shown that is tdc on the Comp stroke. But thanks for the tip!
@@THEMOWERMEDIC1 maybe mine is different but on mine TDC is every other turn with the arrow lining up. its on intake with arrow lining up, the next time around its on trut TDC
@@THEMOWERMEDIC1 when did you show to differentiate between the strokes? Just watched looking specifically for it.
Good tutorial video. 👌 I really liked at the start your emphasis on throwing the old gasket away immediately. 💯.
I’ve got an older km110r and the last time I had the valve cover off it look extremely clean, I’ve always been very good about maintenance and it’s been a very dependable trimmer, it did seize a valve once but that was quick and easy to fix, I run 32:1 mix and I have no issues with carbon, I do run it wide open frequently.
Mix 50:1 and run full syn oil and the valves
Wont seize
@@THEMOWERMEDIC1 I did switch to syn oil a couple weeks ago, still 32:1 due to the fact that I run my machines wide open. Haven’t seized a valve ever since. I currently use hp ultra but will be switching to red armor soon
Good job dude you have more patients with that stuff I have 0 patients
So do all the 4 mix's take the same valve adjustment kit?
Yes
OK, good info. I have that problem. What feeler? It will take weeks till I can get that order to me for the kit. For the mean time what feeler? You can tell me in metric or sae. I've got both.
Awesome job explaining everything.
Thank you for your support
I have A fs 135R. How often should these valves be checked? I wouldn't want to waste A gasket if they don't need adjusted.
correction FS 130-R
@@garypitzer8729 depending on how often you cut, I have to do mine at least twice a year. I cut 4 lawns.
Thank you. Great video.
Can you make more videos on trimmer repairs please
I will be doing some videos soon on the weed whackers..... I think I have a couple of videos on leaf blowers and weed eaters now, but I will get more in depth on some later..........
turning the fly wheel to TDC .You didn't mention the compression stroke where when turning the fly wheel both valves don't move
Thanks for the info , is it the same for a poulan blower ?
The 100rx I use at work seems kinda low on power. Idle is constantly different some days slow some a bit faster can’t get it turned down low enough for the head to stop turning without it sounding like it wants to die. It is at least a 8yrs unit and did have a new carb out on in 2017 also tune up, and valves adjusted, but as I can recall it only ran really good and properly for maybe 2 or 3 months by the next year it was acting similar to how i mentioned in beginning.
Help--My sf45 doesn't have a valve cover or valves as far as I can dee!!!!!
I adjusted the valves but just a few seconds after they’ll get loose or too tight. What can i do?
Adjusted the valves on what?
THEMOWERMEDIC1 sthil weed eater fs 130r
THEMOWERMEDIC1 i did what you did on the video but just 10 seconds after powers up it dies and the valves are too tight sometimes too loose again
Camshaft pin worn out most likely but most
Of the time it wallows out the engine case
Make sure it’s TDC on the compression stroke, not the intake.
How often do you have to adjust the valves jimmy australia
I have to adjust mine at least twice a season. I cut 4 lawns.
Great video. Would you recommend thees trimmers with the 4Mix engines vs there regular 2stroke ones like the FS94?
I have 2 FS94R and I have not been happy with them They have been in the shop in The first 2 years than any other Trimmer we have ever ran.
Best thing that happened to my 94 was when it got stolen. Only had it 3 weeks and I hated every minute. I keep fixing up my fs80 and wish they still made them
I have the km130 kombi. 6 years , zero problems!
Old comment, but I have the 91r. Worst piece of Stihl equipment I've ever owned. It does work if you babysit it. Cannot recommend.
By saying make sure to adjust top dead center on the compression stroke not the intake by that do you mean in other words if I wiggle the flywheel back and forth the valves shouldn’t move at all? Then it’s on compression stroke if they move up n down it on the intake? That’s how I adjust adjust but did have issue with it not running that much different afterwords so I think it was because of not changing out the 2 sealing gaskets. Either that or that didn’t need adjusting I don’t think they need to done that often and Stihl doesn’t make it clear what all contributes to valves being out of adjustment.
With mine it will not run once warm if the valves get a couple thousandths out. Very frustrating when you're in the middle of a job.
I've had issues with the screws on the bottom engine pan backing out. make sure you check them everytime you adjust the valves. Has anyone else had this issue?
Under normal conditions (not making a vid), would you clean the rocker arms etc.? If so, what do you recommend for that?
Very good video. Thanks
I have a Stihl fs 91 r weedeater and gas I leaking at the muffler and leaks a little at the filter how can I fix it
Good video/info. Thanks Mowermedic 1
I thought there would have been more to it great video.
Great video. I have a question. So I had recently changed a cylinder head on my john deere jx75 mower with a 6 hp kawasaki engine and I did adjust the valves but I'm still getting too much compression. What could be causing this?
Compression release is
Broken on the camshaft
I agree with MM1 ............ Why did you change your head ???? Bad valves ????
What gap did you set at ??? I see you are in the lawn care biz and you got some wrench's under your belt I assume.........
Comp releases or a common failure on Briggs cams on the single's .... I haven't seen one in my shop on a Kawi 6 HP though...
Most Kawi's we have down here are on EX MARK and the higher end Zero Turn mowers........
Here in South Louisiana we have mostly Briggs on push style mowers......
Kohler Dis Courages LOL are getting frequent in the shop now with all kinds of issues with the bolts loosening up and cracked blocks....
What is your Model number on your engine ?? FC 150V ??
Boo LuQuette well I had gotten the mower for free but the carb bolt was broken when I got it. So to make it sound better and work better, I wanted to replace the head. I did gab the valves at .005 in as specified.
Boo LuQuette also the model number is fc150v hs00
Yea 5 and 5 is good... Can you get it past the compression stroke and then start it easy ??
Could you please tell me where the exhaust valve is located on a Stihl FS 45, or if it even has an exhaust valve and/or intake valve on this 2 stroke engine? It is terribly hard to pull the starter.
2 stroke engines don't normally have any valves.
Very useful info
Very useful thank you 😊
set the valves correctly, TDC on compression stroke, but still extremely hard to turn over! what could be wrong?? i even checked the cam wheel to make sure timing was correct. it was!!! at a loss!!!!
Thanks 😊👍, I learned something new, this day, Iwas doing it wrong
You forgot to mention it must be on the right stroke.
You must’ve skipped over that part. I mentioned it several times
@@THEMOWERMEDIC1 You did not. Please provide timestamp if you think you did.
The engine has to be cool, zero compression, both valves closed
👍👍👍👍👍👍👍👍👍👍👍🏰🏰