In hopes of solving the sputtering and 4 cycling that has plagued my RCGF-USA 26ccsince last year. Yesterday I pulled the engine, rebuilt it (left the cylinder on the crankcase, those bolts weren't going anywhere), and completely dismantled and cleaned the carb. The parts and gaskets were all fine. On the diaphragm side there was a surprising amount of fine grit in the pump side. I wonder if thats what the main problem was? The enginenisnt running perfectly mbut its so much smoother. Right now the sputtering is softer and only at wide open throttle (WOT).
The engine before breakdown and cleaning.
After the breakdown dn cleaning.
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