Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

I have a 9 horse Tecumseh (Craftsman) chipper shredder with good spark that will not start. It has 25 pounds compression. Is that too low?

25 psi of compression is way to low, u want at least 75 psi min. has the engine ran recently ?, l would inspect the head gasket.

is that compression test done thru the sparkplug hole???  or thru the hole in the block???? 

mech12 wrote:

Ouch.  That hurts.

I'd be looking to see if both valves are in.    

You may have just a bit of carbon under the exaust valve..

Pull the head off and see if the valve is fully seated,  and examine the engine wear at the same time.

Good Luck

Friiy

  you say a bit of carbon,   how about a chunk of carbon 

I found a motor that a mouse had been hiding cat food in the intake manifold (big motor) ,and one peice got caught on the valve face at startup....

Friiy