Wanted to try a lower pitch prop on my Skylark and happened to have a Bolly 3 blade 12-41/4.. Only 3 blade spinner I had was a Dubro plastic so I put it together with the spinner back and started tightening the prop.. All of the sudden SNAP! the prop drive washer broke 

What the heck is this all about... Looks like the drive washer was forced too far into the retainer cone and it split the drive washer. Can't believe it happened, never had a problem with 35's and 46's.. Wondering if it was machine tolerances and whatever was suppose to stop it didn't. Weird...

Have no idea if the 51 will turn this prop but wanted to try it full length before I started cutting it down. Now even though I have another engine I can rob the parts from I'm a little scared to try it again, has this happened to anyone else 

Thanks Randy,

Had an old G21 drive washer, looked like it would fit but the skirt (for lack of a better term for the thin overhang on the back) was a bit long and rubbed against the front of the engine. Chucked it in my lathe and cut enough off so it would fit.  Have it all back together and looks like it will work fine.