MS280C No Start

[user 185993]

Compression 120 p.s.i. unit has spark. Originally came in would start but would die out when giving it throttle. Has set for a little over a week and now will not even start. Still have spark and compression still at 120 ps.i. Don't want to just a throw a carburetor at it but that's the direction I'm leaning. Any help tips greatly appreciated.

 

[2StrokeFondler]

Don't want to just a throw a carburetor at it

Then don't, and throw a carb kit at it first?
Can you pressure and vac test the thing?

 

[user 185993]

Then don't, and throw a carb kit at it first?
Can you pressure and vac test the thing?

Did a vac test and it held....poured a small amount of fuel into the system and still no start. Doesn't even act like it wants to fire. Rechecked spark and seems to be fine.

 

[2StrokeFondler]

Why only vac, and no pressure test?
Did you check the exhaust? Is it clear? Is the spark catcher thingie free?
120 psi is nothing to write home about...

 

[ZeroJunk]

Pull the plug and see if it is wet. If a saw is flooded they will not start. If it is wet put the saw on high idle and maybe pull it 20 or 30 times and see if it starts to hit.

120 PSI is not great, but your tester may not be either.

Once in a blue moon the flywheel will shear the key and move if the chain brake is engaged at high RPM.
So, you could have fire at the wrong time as well.

 

[user 185993]

Did a vac test and it held....poured a small amount of fuel into the system and still no start. Doesn't even act like it wants to fire. Rechecked spark and seems to be fine.

Okay found the issue. Both vac and pressure test passed. . Ohms test passed on wire leads to carb solenoid. When I removed the flywheel to check for leaks on the seals that where I found my problem. Keyway was sheared of the flywheel.