QuestionHello, I have a 1979(?) Suzuki PE 175 and when I first start it, it runs fine, but after about a min. or so it starts to bog down and die, when I take the plug out, it has fuel on it, and I took the exhaust pipe off, it had fuel in it.
Could my intake valves be worn/sticking? The bike has good compression. Also, I noticed a big fuel stain on the ground behind the bike where it was running, it was spraying fuel out of the pipe.
Thanks, Jeff York
AnswerJeff,
The most common way your engine can ingest a fair amount of liquid gas into the combustion chamber would be due to an overfilled carburator. It is possible the carb has a film of varnish over all it's interior parts. If the varnish sticks the needle valve shut, no fuel can enter. If it is stuck open, the float bowl can overfill. Normally the excess fuel is diverted out a tube but if that is blocked the incoming air will draw the fuel into the cylinder. Be aware this can foul the plug causing poor ignition.
My suggestion, dissassemble the carb and clean. Here are some detailed instructions i've given others on this procedure:
Disassemble, clean all jets and orifaces with solvent and COMPRESSED AIR ONLY, use NO wire or picks to clean holes/airways. Rebuild carbs with new gaskets and make sure your floats are set correctly. . Do not overlook the float level, be very sure you are not starving for fuel or allowing too much to enter (there is a hieght setting for these in the manual). In relation make sure fuel flow is unobstructed and use a good in-line fuel filter from the tank to the carb. Even tiny particles in the fuel can get logged in critical areas and cause havoc.
Hope this helps, Mike
