Small Engine Troubleshooting Problems? Ask a Mechanic Now.
If you put a teaspoon of fuel direct into the spark plug hole, re-install the spark plug , will it run for a few seconds? If yes, then it has to be fule through the carb. If not, check the compression, if compression is good, check the valves and the timing key on the crankshaft to flywheel.
If it does not run for a few seconds, check for compression, use your finger with rag over the spark plug hole, it should have enough compression to move your finger. If it has compression, I think I would check the timing key between the flywheel and the crankshaft.
They are vent lines, in case the carburetor floods.
No, the other end, where the pull start would be. The flywheel side, , the centrifugal clutch is on the output end, not the flywheel end.
The key shears off and this changes the timing, so engine will not start or run, Did you look at the link I sent?
Yes, you can come back tomorrow, there will be a link in your email to get back.
Did you check the valves for clearance? Around .006 inch intake and exhaust.
Is there a pulse fuel pump between the tank and the carburetor? three hoses, one from tank, one to carb, and the P pulse line from crankcase or rocker cover?
Black box sounds like fuel pump! Do you get fuel pulsing if you remove the inlet to the carburetor and crank?
Fuel flowing to the carburetor, if you remove line at carb?