Mercruiser Pre Alpha One Trim Arms Cylinders Anchors Front Rear Pins Pivot 69-82 Oil Senders Pumps and Remote Filters This one has casting number

This one has casting number 818763C1 (818763-C3 is another common stamping) The other type of bearing carrier MerCruiser used (On Alpha One Gen I & MR lower units) had casting number 73020-C which is NOT the same as this one as it doesn't have the spot for a Locating Key for the bearing carrier

3hp 4423 (1947-1951) Which I think was also similar or the same to model 4424 which also covered years of 1947

so this is not compatible with those models

814386 Steering Knuckle

Mercruiser Pre Alpha One Trim Arms Cylinders Anchors Front Rear Pins Pivot 69-82 Oil Senders Pumps and Remote Filters This one has casting numberItem Details MerCruiser Pre Alpha One R Drive I Front & Rear Trim Anchor Pins Washers Nuts (1969 1982) Freshwater Used Parts Overall good condition. Everything you would need here minus the rubber washers. Part Numbers Included Long "Front" Pin 17 45735 Overall Length: 10 11 32" > 10 5 16" Diameter: 5 8" Short "Rear" Pin 17 45738 Overall Length: 7 1 2" Diameter: 5 8" Washers 12 46765 Washers 12 45737 Nuts 11 34932 THREAD SIZE: 3 8 24 Compatibility All