MerCruiser 25-45710 25-45711 O-Ring Set Reverse Lock Valve 48165A5 76812A4 Trim Parts It was roughly 1990 when

It was roughly 1990 when they switched over to 1-piece rear main seal engines will measure 3" across between the bolt holes on the crankshaft vs

(STERN DR (233 MIE FORD 351 V-8 1975-1976)

The cover had been removed from this and the diaphragm has been inspected thoroughly

0L 140hp / 3

This particular item would have been used with MerCruiser engines with the cast style engine coupling rather than the triangular stamped coupling (Generally Early to Mid-80's items)

MerCruiser 25-45710 25-45711 O-Ring Set Reverse Lock Valve 48165A5 76812A4 Trim Parts It was roughly 1990 whenPart Number(s) Included MerCruiser 25 45710 O Ring (The Larger One) MerCruiser 25 45711 O Ring (The Smaller One) General Application Compatibility For MerCruiser Systems using both Prestolite Trim Pumps (Square Reservoir) with a reverse lock system which is the standard configuration found on most MerCruiser applications 1970 1982 Found on both the Reverse lock assemblies that have inter lock switches as well as those that did not Other Details NEW