ORIGINAL: SpaceCowboy
It could cause vibration just like any dirt could. I think it might be more prevolent on a light weight carbon fibre spinner than an aluminum one.
Did you check the balance of the spinner & prop ?
Don't forget a single cylinder engine has vibration especially at low RPM.
A fouled spark plug could also cause vibration.
I hope this helps.
Thanks for the reply!
For balancing the prop, I have to admit I never got to balance one before. Do I need a special tool to do this? Anyways, the prop is new (Menz 23x8) and I used a gig to drill the screw holes.