Posted by Jim on March 05, 1998 at 19:16:58:
In Reply to: Re: Re: Inoperative 8N posted by Bill Swanson on March 05, 1998 at 17:04:27:
: : : My 8N refuses to start.Good spark verified and carburator cleaned. I am now looking for a detailed shop manual for this device. The I&T manual I have is pretty skimpy. Appreciate any suggestions.
: : Is the spring still on the trap door on the choke
: : butterfly. When this little spring breaks it does
: : not allow the choke to fully operate. Just a thought.
: As I remember there is a spring on the choke plate but none on the throttle plate. Correct me if I'm wrong. The problem seems to center around no or little fuel to the cylinders. I have disassembled and cleaned the carburetor. All jets appear to be open but during cranking of the engine and choking, only the plug in cylinder No. 4 is moist. The rest appear to be
: dry. The spark is good and timing appears to be TDC. Compression runs 40-50 psi. I don't know what is specified. Compression ratio is 6 or 6.5 to 1. Thanks for the thought.---Bill
Bill, It sounds like your compression is low, try this trick. Remove all plugs and squirt some oil into each cylinder. Install plugs and try to start. The oil in the cylinders will sometimes raise compression enough to create vacuum that draws fuel up through manifold. Good Luck.