I just picked up a project sled and it has a helix that my aaen book dose not list. Its a yamaha helix 8bv-50 any one know what it is?
Scratch that found it old a new castings
mopar1rules
Active member
its a straight 45. 8bv50 and 8bv51 are both 45 deg. 8bv51 is simply a newer casting.