poulon pro 335 hard starting

[herman]

My poulon 335 is very hard starting when cold. The start rope comes out for a short ways and then stops very suddenly, almost tears your arm off, works fine with ignition switch off. Once you get the saw warmed up if you are lucky enough to get it going that is, it starts fine. Saw runs great under power. The saw is relatively new with low hours

 

[HiOctane]

Could be fuel entering in your cylinder in "large quantity" causing the piston to stop when he try to compress the gas inside the cylinder.Or chain oil is leaking in the engine causing the same prblem,but if its oil,when the engine finally starts ,she will smoke very heavily.
So you have probably to clean your carb and check the condition of the inlet.

 

[herman]

poulon pro 335 hard start

thanks for your suggestion but there is little or the normal amount( hardly noticeable)

 

[spacemule]

If it cranks fine with the ignition off, it won't be a carb issue. How fast are you pulling it over? If you're pulling too slow, it will kick back for sure. Try pulling the cord slowly up onto compression, then, with the piston nearing the top of its stroke, pull with a steady, firm, FAST pull and it should be less likely to kick back. Sounds as if either your spark is too far advanced or your starting method needs improvement. As mentioned numerous times on this site and others, partially sheared flywheel keys will cause this.

 

[herman]

poulon pro 335 hard start

I think my starting procedure is good but I believe the ignition module might not be retarding the spark enough to fullfill electronic decompression, causing the starter rope to almost kick back out of ones hand. I am under the impression the module should only go to full advance after around 800 rpms I'm not sure how to check the module. A partially broken key on the fly wheel sounds like a good bet. I will have a look to-morrow morning.

Thanks!!!!