That little rattle or click you hear when you rock the prop back and forth ??
I haven't heard an engine that didnt have it . They all sounded a little different from each other. But they all had it.
Some of the noise may be the tolerances in the needle bearings and races. Some of it is the piston ring in the groove of the piston.
I usually don't worry about it unless it seems really loud when the engine is running.
Never pay again for live sex! | Hot girls doing naughty stuff for free! | Chat for free!