076 help needed

[Ratboy]

Picked up a stihl 076 at a clearing sale last weekend, condition unknowen. Took her home, and pulled the cord and it went BANG! I guess this beast is too far advanced (?) As she has a sealed magnito ignition, Im at a loss as to how to adjust the timing. Any help would be greatly appreciated!

 

[Lawn Masters]

Is the ignition too advanced for proper running? or are you speaking of the whole saw going boom?

 

[Ratboy]

It won't start. When I pull to start, the saw goes boom. and a puff of smoke comes out the exhaust(only done this twice).

 

[HiOctane]

Did u check if your flywheel key is Ok ?

 

[Ratboy]

Ahh ha! Thanks HiOctane. Took off the flywheel and the key doesnt look like it's got much meat left on it. The valley that the key goes in seems a little rusty which may indicate that the key wasnt seating properly. I guess this is a real likely cause of the problem; the position of the fly wheel is the only way that the timing can altered? Shall pick up a new key tomorrow, and fingers (whats left of 'em) crossed!

 

[HiOctane]

Ahh ha! Thanks HiOctane. Took off the flywheel and the key doesnt look like it's got much meat left on it. The valley that the key goes in seems a little rusty which may indicate that the key wasnt seating properly. I guess this is a real likely cause of the problem; the position of the fly wheel is the only way that the timing can altered? Shall pick up a new key tomorrow, and fingers (whats left of 'em) crossed!

Check if the keyway itself in the flywheel is not damaged also.

 

[Ratboy]

Thanks HiOktane, replaced the key, keyway was fine, put her back together and she purs like a kitten. Much apreciated.