Engine Problem 49cc 142f

[tonyjabroni]

Hey fellas! I'm very new and very unskilled to this. The problem I'm having with my 142f is this... The engine fires up and idles/revs just fine but when there is a load on the engine, it shakes violently. The engine has <100 miles on it. My neighbor though it might be a damaged crank shaft but my technical skills are limited. Any thoughts?

Edit: Found a bolt head lying on the ground... upon further inspection, a bolt on the side of the engine mount seems to have broken off. Going to mend this and see what we're working with.

Edit2: Having replaced the bolts with better quality ones on the engine mount, it still shakes when a load is on it.

 

[mxc235]

interesting. sounds im not alone with this s*t.

 

[CrazyDan]

His sounds like a broken woodruff key. Not sure what your problems are, wish I had your engines in front of me. Hard to fix something I can't touch.

 

[darwin]

Only issue is under load. What kind of transmission are you using? I'd be looking there at the clutch/tranny if applicable from the little info you've provided.