MS 500i chain running at idle with new clutch

[Lemuel]

I recently replaced a clutch on an MS 500i which had the problem of the chain turning at idle, I removed the clutch which in my opinion had slightly worn springs and I replaced it with a new one, as soon as it was turned on it seemed that the problem had resolved itself but after a couple of accelerations the chain was still running at idle as if the idle was slightly high, I tried to make a couple of cuts but nothing changed; What do you recommend, thanks in advance

 

[GeneralKayoss]

This may be a dumb question, but have you tried to adjust the idler screw?

 

[Lemuel]

This may be a dumb question, but have you tried to adjust the idler screw?

The stihl ms 500i has injection and therefore does not have a carburettor, unfortunately it does not even have adjustment screws

 

[ZinTrees]

possible that its got an air leak, and idle is rising? I know it should compensate but it can't tune out a leak

 

[stihltech]

Is it idling higher than normal? Could there be an air leak? Can you stop the sprocket manually? Is the bearing spinning freely? Is the pump worm spinning freely on the crank at idle? Is it reassembled correctly? Will it idle with the chain brake on?

 

[Derrick Sawyer]

Agree If u have tach check idle rpm, does it change when u turn saw on either side?

 

[muddy42]

Have you tried the carb reset procedure?

 

[GeneralKayoss]

The stihl ms 500i has injection and therefore does not have a carburettor, unfortunately it does not even have adjustment screws

Ahhh, I don't have any of these new fuel injected saws lol

 

[lone wolf]

How does the bearing in there look, I had washed my 500I and the bearing rusted and caused it to do what you describe . Look at it clean and inspect it.

 

[Mad Professor]

That's why I love a fully adjustable carburetor I can fix myself.

 

[Mad Professor]

How does the bearing in there look, I had washed my 500I and the bearing rusted and caused it to do what you describe . Look at it clean and inspect it.

GREASE!

 

[lone wolf]

GREASE!

View attachment 1239251

Looks like RedtTacky!

 

[StihlsawuserMS361]

How long was it idling high before you swapped out the clutch? My 500I, when still new, few tanks through it ran what I'd describe as a high idle whereas the chain continued to run with no throttle pressure. If it were carbed, I would have been reaching for a screwdriver. I didn't know what to do, still in warranty, called the selling dealer and got the "never heard of that before" attitude. So back to the wood pile, cautiously continued cutting, and it settled down. Aside from it being a bit hard to start still, it's been a good saw.
If I had to do it over again, I probably would have bought a carbed saw, maybe a 462? Still might, but with zero "local" support, it's a crap shoot. Same, sadly no dealer support for Husky's also.

 

[stihltech]

OH MY GOD IT HAS FUEL INJECTION-AHHHHHH!!!!

It is just a two stroke saw. All of the same rules apply.
Good fuel, clean air, good spark and internals..
Still has rubber parts that must not leak. Wiring must be good. Fasteners tight
Flex the saw while running- any change?
Spray brake cleaner or carb cleaner around all rubber connections, seal and gaskets- any change?
Pulse hoses are always suspect. A few more hoses with fuel injection- must all be good.
Have had a couple cylinder gaskets leak.
All those things must be good BEFORE fixing other electronics.

 

[Lemuel]

Update: The chainsaw is almost melted and has a broken shaft bearing resulting in an air leak, thanks everyone for your replies

 

[Toby Smith]

The good old Stihl "built in obsolescence" plastic bearing cage strikes again....

P.s I'm not a new member, for some reason I was asked to reset my password using a link to an email I haven't used for 25 years!!!!!

 

[alfredr]

Similar situation here too. Different user name than I had been using because I couldn’t get into that old email; didn’t know the password, or maybe the email has been deactivated from not using it, who knows.
No comment on the saw.