MerCruiser MR Alpha One 1 Lower Unit 818763A10 73020-C1 Bearing Carrier Gen II Heads 190 GM 283 V-8 1963-1964

190 GM 283 V-8 1963-1964 1564539 THRU 1730903

Trim Cylinder Cover: 909252

the exhaust port on the Cobra gimbal housings had changed

Male connectors on both ends

this might have been the case for the flywheel housing as well

MerCruiser MR Alpha One 1 Lower Unit 818763A10 73020-C1 Bearing Carrier Gen II Heads 190 GM 283 V-8 1963-1964Item Details MerCruiser Sterndrive Alpha One Lower Unit Bearing Carrier Used in MerCruiser R MR & Gen I (1983 1990) & also Gen II lower units 1991 & Up However, You just need to inspect the casting number to see if the one you are replacing is the right one. This type was the later type used mostly newer stuff using tab washer 14 18323 on Gen I & Gen II Standard Rotation lower units. This will only replace bearing carriers with either 818763C1