It appears the 850 foot will work on the 1150. The 850 has a 2:3 1 ratio and the 1150 a 1:78 1 ratio. It's just the housing on the lower that's bad. PO had the motor tilted very high and the threaded area in front of the prop got ice in it and split. I would think the gears are good as water didn't get inside. May be able to swap the internals? I would like to keep the 1150 on there, its rigged nice and runs nice. I got the 150 for the picklefork, but was considering putting it on the GT thinking the shorter shaft would help top speed. I'll get ahold of you Joe!