Well guys ... Had the wife and kids out today ...Have a 75 SeaRay 22foot 235hp ford 351 Windsor 600cfm 4bl holly and a OMC 800 stinger ???? I think that's what it's called , it's an OMC 800 something ... I put a new prop on a SS prop ... and was going to test out my new top end speed with the GPS , Well my top end before was 37.2MPH at 4200RPM .... I was going about 25mph and doing a tight left turn ... and PINNED it , to do a speed run with the new SS prop . Well 2 sec into the run ... there was a BAD BAD SOUND ... '' I thought it was the C/D player '' ... But I was loseing speed .... Shut her down , and got a tow in to the Marina $50.00 bucks ... Once I was in I found that the shear pin was gone on the prop ... I put the drive back down with the prop off and it seams to be working both back and forth .Do you guy's think That's what's wrong ? Or should I look a little deeper ? I was told tonight not to go over 40MPH with this out drive . I wish I had a Merc I/O .... Hahaha . 