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I had the engine running in December last year. I tried to start it again last week, but could not get gas to the cylinders. I cleaned the carb (Marvel Schebler) and replaced the gasket, but no help. I watched the valves open and close. I could blow air into the sparkplug hole on each cylinder and have it blow out the connection to the carb. I had new rings and new valves installed a year ago. I appear to have good compression, but I don't know what it should be.
My understanding of how this should work is as follows: the downstroke of the piston should create a partial vaccumm which will draw the gas from the carb to the cylinder. The venturi does not fit tightly between the upper and lower halves of the carb, but I do not see in the parts manual any gaskets that should go on either end of the venturi. Am I thinking correctly?
I can manually squirt gas into the cylinders and have the engine run momentarily. I am just about at wits end on what could be the problem. Any help would be greatly appreciated as I am shooting to get the tractor to a parade the middle of July where hopefully my 89 year old father can drive it.
Thanks, Louis Steiner