084 air leaks

[Boomer 87]

I have a 084 that powers a saw mill with a 5' bar. It has what I believe to be a slight air leak, but it's in reverse of normal. It seems to leak when upright. I'll dial in the carb and it runs and idles perfect. Then when on my mill with power head on its side it seems to get super rich to the point it will stall bc of to slow idle speed.

Has anyone experienced a leak like that, or is there something else I should be checking. Also are crank seals still readily available for the 084? I don't want aftermarket.

 

[blsnelling]

It's all guessing until you put a gauge on it. I personally don't put a lot of stock in saw position. Other factors can cause that.

 

[Mastermind]

Time to tear it apart and fix it.

 

[Onan18]

Time to tear it apart and fix it.

What the boss man said, better now then after it fries. I would look real close at the carb, could be a leaking welch plug or main nozzle check valve.

 

[Chainsaw Jim]

Oem seals are still available.
The PTO side is still used on the ms880, the FW side size is still used on the 024,026,028,034,036,046.
084 PTO: #9640 003 2250
084 FW: #9640 003 1600

 

[Mastermind]

Oem seals are still available.
The flywheel side is still used on the ms880, the pto side size is still used on the 046/460.
FW: 9640 003 2250
PTO: 9640 003 1600

Close......

Flywheel side: Part 9640 003 1600 (Oil seal 15x29.6x4) Also used in the PTO side of many models from the 024 - MS461

PTO side: Part 9640 003 2250 (Oil seal B20x39x4) Also used in the MS880

 

[Boomer 87]

Being a milling saw I'm gonna take it down and put new rubber parts in and crank seals anyway. The saw runs great other than the change in idle. It doesn't lean out under WOT or anything of that nature.

I guess next week I need to price a pressure/vacuum with my snap on dealer....

 

[Mastermind]

Being a milling saw I'm gonna take it down and put new rubber parts in and crank seals anyway. The saw runs great other than the change in idle. It doesn't lean out under WOT or anything of that nature.

I guess next week I need to price a pressure/vacuum with my snap on dealer....

Look into a MityVac. That Snap-On stuff is too damn HIGH !!!!!

 

[Chainsaw Jim]

Close......

Flywheel side: Part 9640 003 1600 (Oil seal 15x29.6x4) Also used in the PTO side of many models from the 024 - MS461

PTO side: Part 9640 003 2250 (Oil seal B20x39x4) Also used in the MS880

Thanks, I didn't notice that I mixed it up. Lol

 

[Mastermind]

Thanks, I didn't notice that I mixed it up. Lol

Repped.

 

[Stevetheboatguy]

I just got done going through my 088 because of a similar problem. Ended up being some of the shellac they used to seal the carb welch plugs was floating around. I figured that was it when I found it. But figured it was old enough to change out the rubber parts. Glad I did, the lower fuel hose was getting iffy.


Steven