Originally Posted by
the pope
Mufflers get bloody hot so thats not a sign necessarily . Warm is ok , hot is when you cant leave your finger on there for a second or 2 . Normally if u have bearing issues u can hear them or there is slop when u grab the prop both sides near the ends and give it a wiggle . Cheers
p3arljam; I have Saitos and have experienced having a warm spinner and prop shaft, this is a an indication that your HSN is slightly set to lean which allows the engine to run a bit hotter than it should. Turn the HSN only 1 click CCW to richen and fly, when you land after the flight, recheck the spinner for warmth. If it is still warm, turn the HSN 1 more click CCW and do another flight, recheck the spinner again after landing. This technique eliminated the wam spinner on both my FA-100's, one of the FA-100's took 1 click rich and the other FA-100 took 2 clicks rich to eliminate the warm spinner.
Roger