I do 2 things when a problem like this occurs. 1 I use a wall scanner and insert into spark plug hole. I can usually determine the condition of the piston and cylinder walls this way. A wall scanner is used by carpenters to check for wires or plumming in walls. 2 I make or buy a tool so I can blow compressed air into the cylinder. This will determine the condition of the valves. Rotate to tdc when both valves are closed. When adding the air it may spin the motor over to bdc, but that's ok. Just be careful when doing so. If air blows out exhaust, then exhaust valve is bad, if thru the carb, then intake is bad.
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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