76SeaRay
Lieutenant Junior Grade
- Joined
- Aug 24, 2017
- Messages
- 1,047
So, I am test fitting parts to get ready for assembly of my lower unit. The new lower housing I bought came with a lower roller pinion bearing pre-installed. When I tried to insert the vertical driveshaft, it would not go into the bearing. Looking closer, the rollers in the bearing are larger than the ones in the old housing and old pinion bearing. If I check part numbers, the pinion bearing for the MC-1/R is part number 31-92366A1 and the pinion bearing for the MR is part number 31-42647A1. Is the lower gear case housing the same for MC-1/R and the MR? If so, can I remove the larger bearing that appears to be a MC-1/R bearing and install the MR bearing? Did the driveshaft size change from the MC-1/R to the MR? Trying to decide if I need to return the housing...