Trouble with two MS360s

[calebng15]

Where about are you in va? If you are close, we could hook it up to my vac gauge.

 

[Kevin White]

Where about are you in va? If you are close, we could hook it up to my vac gauge.

Im in Giles County. Not too far from you.

 

[Kevin White]

Question on saw number one, Did you use the same wrist pin and bearing when you switched pistons?Trouble could be in that area.

Thats a good thought. I will double check that area.

 

[Kevin White]

Update to saw number 2. I blocked off the exhaust with a silicon mat that I had. Reinstalled the exhaust with it behind it. I then blocked off the carb the same way. Took the impulse line to the mighty vac and blocked off the impulse line nipple off the intake area. I am not holding any pressure or vacuum. I cannot get it to hold a reading. Am I doing something wrong?

 

[junkman]

sounds like a leak .presurize it and spray windex around the gaskets and crank seals ,even the decomp button could be leaking

 

[Kevin White]

sounds like a leak .presurize it and spray windex around the gaskets and crank seals ,even the decomp button could be leaking

I will try that. But it's not pressurized at all. I'll pump the mityvac and nothing comes up on the dial. The Silicon I put on the muffler side come out a bit like some things blowing on it but returns quickly.. Seems like there is a gapeing hole somewhere. Muffler blocked, intake behind the carb blocked and intake nipple that leads to the impulse, blocked. Impulse to the vac. Correct?

 

[Kevin White]

Ding! Ok I could pressurize it with an air hose. I'm going to try that. Maybe I should take off the clutch and flywheel to see if it's leaking from there.

 

[lwhaples]

Yes ,on the clutch and flywheel. Hope you find the leak.

 

[Milkman31]

Ding! Ok I could pressurize it with an air hose. I'm going to try that. Maybe I should take off the clutch and flywheel to see if it's leaking from there.

You will need the clutch and flywheel removed. And hook your air hose up and use very little psi. Spray it with soap and water or fill 5gal bucket and drop the whole thig in it!

 

[junkman]

yes put a dial reg and use low pressure like 5 psi so do not pop the seals out

 

[huskihl]

Seals will pop at about 15 or 20 psi. Plug the decompression or spray some stuff inside it and spin it around to try and get it to seal. After you remove the clutch and flywheel lay the saw on its side and spray windex around the seals and watch for bubbles. If you still can't find it, while it's on its side, I dribble some bar oil around the seal while under vacuum. The oil will seal the leak and it'll start to build vacuum.

 

[Kevin White]

Update to saw #1. The crankshaft is broken at the clutch.

 

[huskihl]

Well that sucks. If the rest of the saw is good I'd put a crank in it

 

[Kevin White]

How does a crank break there?

 

[Milkman31]

How does a crank break there?View attachment 23180 View attachment 23181

Chain tensions to tight may have had a part in it.

 

[junkman]

I had a 660 break there also i think chain was tightening up on me when stumping a big maple ,cutting in dirt , it actually broke milling ,i had a real jumpy chain at the time .

 

[Gunn]

Stress fatigue

 

[Kevin White]

The part is ordered. I actually cut wood with it like that. Hahaha crazy