Originally posted by rslstft
Just curious as to why this is happening, I have 7 Saitos including 2 twins and have NEVER had on backfire and loosen the prop. I break them in on a PSP Manufacturing engine stand sickeningly rich for about a hour before installing in a plane, but even on the stand have never had a prop come loose????
Apparently it happens from getting the engine too lean before it is completely broken in. I had it happen on my 180 before I found out it takes a few gallons to get broken in properly. I started running very rich, and no more problems!
I did not lose my prop since I had a the second nut set up, but my prop got cut halfway through one blade (wooden prop) by the tru-turn spinner...while destroying the spinner (ouch).