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Noisey engine, fouls plug

#1

D

dlsevier

Have Craftsman lawn tractor Model 917.288562 with Briggs and Stratton, two cylinder 24HP, Model 4456 77 2188 GS engine. While mowing the engine popped and blew a small amount of dark smoke out the exhaust pipe. The engine starts and runs but is noisey. I checked the plugs and found one fouled. The new plug immediately became fouled. I checked the compression and read a 170 PSI on the good cylinder and 150 on the defective cylinder. What should I do next to determine what is wrong with the engine?
Thanks
Deanna's husband Sam


#2

B

bertsmobile1

Fouled ?
Black & fluffy like chimney soot ?
or
Oily and black ?
or
just plain wet ?


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