When I "blip" the throttle on my force 125, as RPM starts to drop off the high, there Is a pronounced dull knock (about 2 or 3). It actually gives a little shake to the engine. I know 2 strokes and it is no rod knock, Can anyone help me on this one?
To check for a miss and the "clunk" that my friend complained about when using the boat. RPM's were only to about 2,500. Cylinder pressures are manimized at a blip and make a miss more evident whether ign. or carb.
