I just recently over tightened my prop on my SK .90 engine and locked the engine up. I backed the nut off and helped some (still had alittle drag but the engine seemed to idle and run fine), but in mid flight the engine stopped. After getting my plane back to the pits I turned the prop and it felt like sand in the bearings. After doing a search for torque specs for prop nuts on various engine sizes, I came up with nothing.
I purchased a 1/4 inch drive torque wrench that has settings from 20 in/lbs to 200 in/lbs.
I was hoping to find information with prop nut torque specs according to engine size.
I searched my manuals to all my engines and even the manufacturers don't list prop nut torque specs for their engines.


Any help someone could give me would be greatly appreciated!