STIHL The Official Stihl Chainsaws Thread

[Maintenance Chief]

Ok I need some help with this one.
I have an older 039 that I put a new piston and rings in , and it runs and cuts beautifully.
But, when it warms up AND I set it on the ground the idle slowly dies down and it shakes itself off, restarts fine and run normally ;as long as I'm holding it.View attachment 390780View attachment 390781
Now ,I pulled the air filer and watched it die. The amount of spitback was excessive. I could see the brass nozzle in the throttle bore drip every once in a while at idle ;which would cause a sudden shutter and eventually the shutter would shut the saw down!
View attachment 390782
Points at nozzle. Where do I get one of these ? As I suspect that it shouldn't be dripping at idle.

@jacob j. Any ideas?

 

[lehman live edge slab]

@jacob j. Any ideas?

You have another carb to try?

 

[Maintenance Chief]

You have another carb to try?

Sort of ? It'll have to come off another saw.
I think I'll do want the service manual says ,that @PogoInTheWoods posted.
Ill start by adjusting the metering level, then drive out the nozzle if that fails to fix it.

 

[heimannm]

The symptoms sound an awful lot like the high speed check valve to me, but the metering lever doesn't require any parts so why not make sure it's right before you move on.

Mark

 

[PogoInTheWoods]

Walbro used lots of different check valve/main nozzles.

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It appears that the one for the application at hand is a single piece nozzle. It also appears that the HD Series was a fairly limited one. I have quite a bit of Walbro material but wasn't able to nail down a plain HD (without additional suffix letter) ipl in any of it, just the following model list acknowledging the existence of the Series and the MediaCAT ipl with corresponding Stihl part numbers.

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I wasn't able to come up with any cross-ref to an equivalent Walbro part number but did coincidentally find this right outta the gate with a Google search of the Stihl number. Looks like your lucky day.

STIHL 029 039 044 046 MS290 MS310 MS390 CARBURETOR VALVE JET 1128 121 5403 B65 | eBay

Find many great new & used options and get the best deals for STIHL 029 039 044 046 MS290 MS310 MS390 CARBURETOR VALVE JET 1128 121 5403 B65 at the best online prices at eBay! Free shipping for many products!

www.ebay.com

 

[PogoInTheWoods]

And interestingly..., still looks to be an active part and available.

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[Mastermind]

We are lucky to have you Poge.

 

[DND 9000]

This should be the original Walbro part no. for that nozzle. Part no. 86-744-1

See: https://www.repairclinic.com/PartDetail/Choke-Valve/86-744-1/2699577

Don`t be confused because it says chocke valve, it`s the valve jet.

 

[Maintenance Chief]

Thanks guys! This Should get me the right direction.
I'm pretty used to servicing the check valve in old SDC carburetors. The symptoms of those are a little bit more exaggerated, when they're not right .

 

[Hoser]

I got my 044 clutch back together last night and stuck it in the wood tonight, tuned and cut 1 1/2 cord. It cuts like a champ, thanks again for the help with the clutch carrier gentleman

 

[Maintenance Chief]

Just wanted to let you guys know, setting the metering height just below gasket surface fixed the idle die. The 039 is going back to the owner.
It seems like that series of saws definitely dance around more at idle then other stihls I have.

 

[heimannm]

Always do the simple things first...

Mark

 

[PogoInTheWoods]

..., or whatever your boss said he already checked.

 

[edju1958]

Hi guys,I just acquired an 051AV & it's missing the clutch cover.If anyone has an extra one laying around they'd like to sell,I'd be interested in buying it.I've looked on feebay & of course they're way overpriced IMO.The clutch cover for the 050,051,075,& 076 all interchange according to the IPL,part # 11116480400.

 

[lehman live edge slab]

Hi guys,I just acquired an 051AV & it's missing the clutch cover.If anyone has an extra one laying around they'd like to sell,I'd be interested in buying it.I've looked on feebay & of course they're way overpriced IMO.The clutch cover for the 050,051,075,& 076 all interchange according to the IPL,part # 11116480400.

I’ll need to check but I’m sure I have one, what you thinking for a price?

 

[edju1958]

I’ll need to check but I’m sure I have one, what you thinking for a price?

Jeez,I hate like heck to low ball you & I don't want to throw money away either.It's your clutch cover,whatever you say it's worth.Just please don't tell me $85 like the sellers on feebay,Lol.

 

[lehman live edge slab]

It’s not pretty but not cracked or broken anywhere.

 

[lehman live edge slab]

It’s not pretty but not cracked or broken anywhere.

10$ plus shipping? Might have some nicer ones but I need to dig more.

 

[edju1958]

10$ plus shipping? Might have some nicer ones but I need to dig more.

I'd like to see what other clutch covers you've got.I'm not in a big hurry just yet.

 

[edju1958]

The 051AV doesn't have a bar or chain either.What's the bar mount pattern on this saw,D025?