andre nunes
Member
Need help. My RV9-A is equiped with a Injected (siver hawk) Superior 0-320 160hp and a wood propeller. Now I have 11hrs on it. The engine is performing great in cruise settings, but after the first flights I noticed a vibration in the 700 - 900 rpm range. The engine shakes in this rpm range and its very disconfortable. In this setting all EGT's indicates almost the same thing and when I lean the engine the vibration get's better, but doesn't disapear. My mechanic said it can be the propeller, but normally wood props doesn't have rpm restrictions and the dynamic balance is done for the cruise settings rpms - so it wouldn't solve the problem. Does anybody faced the same problem or know what can be happening? Thanks in advance for all coments.