Stihl MS361 - need help - starts, runs dies, tried most everything

[MartDalb]

Hey everyone

I need some help.
Working on a Stihl MS361 - it won't run as it should.

I changed - fuel line, pickup filter, impulse hose.
Cleaned out carb and new diaphrams etc.

Tried other carb, from working MS361 - worked better but still dies in idle, and sometimes just cuts off.
The original carb runs poorly, jumps to high speed and dies.

Pressure and vac tested - passed.
It had a leak from one of the oil pump screws, but after tightening it passed the vac/pres test.

Piston is clean and smooth.

Still no change in behavior.
Starts - runs a bit, dies in idle and is hard to startup again.


I am out of ideas here.

Can a bad coil cause this issue?

Any ideas are greatly appriciated!

 

[kyle1!]

Coil...had a stihl fs120 trimmer that did this. It would start/run for a bit then die and impossible to restart. Come back the next day and it would do the same thing over again. Coil was $110 ouch.

 

[snobdds]

Hey everyone

I need some help.
Working on a Stihl MS361 - it won't run as it should.

I changed - fuel line, pickup filter, impulse hose.
Cleaned out carb and new diaphrams etc.

Tried other carb, from working MS361 - worked better but still dies in idle, and sometimes just cuts off.
The original carb runs poorly, jumps to high speed and dies.

Pressure and vac tested - passed.
It had a leak from one of the oil pump screws, but after tightening it passed the vac/pres test.

Piston is clean and smooth.

Still no change in behavior.
Starts - runs a bit, dies in idle and is hard to startup again.


I am out of ideas here.

Can a bad coil cause this issue?

Any ideas are greatly appriciated!

Yes, a bad coil can cause this.

Try to warm it up very low and slow in an oven for a bit. You have nothing to loose. It might save it. Otherwise, time for a new coil.

 

[a. palmer jr.]

A problem I had with my 361 is the impulse hose came off due to a soft A/V system on the saw. I would, in your case, try another coil because I know they go bad on those saws, I've replaced them before..

 

[rocketnorton]

got farmertec coil on way, $14. usd
oe dead
we'll see
have had good luck w china husky coils

 

[MartDalb]

Thanks everyone!

Mounted a working one just now. From my own working ms361.

But ran out of time to test, but the few minutes I had was a vastly different experience.

Startet up, etc. Didnt die, didnt run off to high speed on itself.

I have to reset and play around with the carb/carbs tommorow and put on bar/chain etc.

Run it for half a tank and see what happens!

Thanks again everyone.
I hope this is the fix.
What a time consumer this one has been.
Been through every little thing twice...

 

[TomW]

I also have had problems with 361 coils. I have switched to aftermarket coils due to the crazy price on OEM ones.

 

[HansFranz]

I also have had problems with 361 coils. I have switched to aftermarket coils due to the crazy price on OEM ones.

Do you have a source for that aftermarket coil? I love my 361 but it's getting long in the tooth and I'd like to bookmark a coil source. Thanks.

 

[rocketnorton]

all my china has been farmertec so far
even one part ordered from another china site came in farmertec package, and was cheaper than ft