anyone can help me ? I have a Cap232- size 60 of Kyosho with a OS fs-91II engine, prop 13.5x8 graupner. It is a great plane but the problem is I have to much vibration. is this normal for a 4 stroke engine? I Think the prop is well balanced.

thx for answering

gr

Peter

When you mention "too much vibration", what to you mean? Is the engine moving around? Is the airframe shaking?

Check things carefully. You may need to add structure to help damp any movement of the engine or airframe.