On 4/23/2010 2:18 PM, Jim Gall wrote: > skyport does not sell spinners ??? The did when I had anything to say about it. Same spinner as Univair > and now I noticed that the front plate on the spinner is a real soft > material.. My 85 hp has a spline shaft and the washers under the nuts > are nearly pushes into the soft plate with the 25 foot pounds torque. > To remove the front plate I must drive the prop bolts back to release > the plate. The aluminium is smashed into the threads from the front > plate. That doesn't sound right. Any chance the torque wrench is out of calibration?
This deformation of the plate could be the cause of the vibration as it probably affects the clamping force on the prop. One thing you can try is to remove the spinner entirely (testing only, of course...). Also, for minimum vibration, put the engine at TDC and install the prop so it is horizontal. Bad for hand proping but best for vibration. -- John Cooper Skyport East www.skyportservices.net
