036 Vacuum?

[decableguy2000]

Working on that buddies dead 036. Pressure test failed to leaking decompression valve, replaced it with a Husqvarna one I had extra and pressure held for over 25 minutes with less than a 1/2 PSI drop. Vacuum will not hold for more than 15-sec. I did pinch off the tester hose and it held fine. I'm using a spark plug adapter and have the muffler and carb blocked with rubber self sealing tape. What should I look for next? It will be put back together with OEM parts.

Jeremy

 

[lone wolf]

Working on that buddies dead 036. Pressure test failed to leaking decompression valve, replaced it with a Husqvarna one I had extra and pressure held for over 25 minutes with less than a 1/2 PSI drop. Vacuum will not hold for more than 15-sec. I did pinch off the tester hose and it held fine. I'm using a spark plug adapter and have the muffler and carb blocked with rubber self sealing tape. What should I look for next? It will be put back together with OEM parts.

Jeremy

If it holds pressure and not vac you have leaking crank seals . To prove it gob them up with grease and you can confirm this.

 

[decableguy2000]

I'll give a try in a few minutes.

Jeremy

 

[lone wolf]

I'll give a try in a few minutes.

Jeremy

I think that is it.

 

[Big_Wood]

flywheel side crankseal. same seal as the 026. i've seen way to many of these saws leak there.

 

[AKDoug]

When I have one that won't hold I try the flywheel side first. Pop off the flywheel, then dribble some two stroke oil on the seal. If it has a vacuum leak there it will suck it into the saw. If that's not it, repeat on the clutch side.

 

[fordf150]

When I have one that won't hold I try the flywheel side first. Pop off the flywheel, then dribble some two stroke oil on the seal. If it has a vacuum leak there it will suck it into the saw. If that's not it, repeat on the clutch side.

thats how i do them....much easier and less messy than the grease trick. i use an eyedropper to dribble the oil right on the seal to avoid making any bigger of a mess than is needed