MerCruiser 39331A1 34559 Pushrod Side Cover Aluminum 4.1L 165hp 6cyl 250CID GM Starters & Alternators Connecting Rod and Cap Assembly:

Connecting Rod and Cap Assembly: 600-7A1

as there was a one-off thing for 1984 just make sure your alternator is a 1-wire without additional wires coming out of the back of it

This particular Reverse lock valve assembly was used in MerCruiser 120hp 2

Would have been found on various MerCruiser applications 1969-1978 140hp 4cyl 3

MerCruiser 39331A1 34559 Pushrod Side Cover Aluminum 4.1L 165hp 6cyl 250CID GM Starters & Alternators Connecting Rod and Cap Assembly:Item Details MerCruiser 39331A1 Aluminum Side Cover (Set of 2 as pictured) Replaces 34559 which may have been the reference for the actual aluminum ones found on 150hp models as they switched to steel covers at some point in the 70's but never changed the part number. Compatible with Chevy GM 6cyl cylinder engines 4. 1L 160hp & 165hp 250 1967 1981 Engines (150hp 230cid likely as well) These are the aluminum ones and not the newer style steel ones.