When i reduce the speed of engine, it gives aa unregular vibration to the engine. And after few seconds the engine stops. This happens most, when the speed is inbetween RPM 10 to 12. Can you tell me why this is happening? and how can i fix this problem?
For a 2001 Yamaha F115 4 stroke use NGK Plugs LFR6A-11 gapped between 0.039 and 0.043
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