Water pump base

Sundancer

Well-Known Member
Jul 20, 2005
2,909
Prosser, WA
Boat Info
34 year old CLASSIC 300 DA, towed almost anywhere behind the Duramax Dually Crew Cab.
Engines
16 cyl, 700 cu. in./Alpha I's
I am replacing the water pump base and seal for an Alpha 1, Gen 1 and the bases are different and won't fit on my lower unit. They are higher and have an O-ring. Mine doesn't have an O-ring and is much lower in profile. Local dealers scratch their head as does Sea-Way Marine in Seattle.

it kind of looks like an M/MR but they are angled at the lip while mine is straight. Has anybody run into this and do you know where I can get one?
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Is it possible the blue above in the lower unit needs to come out?
 
Fixed! Apparently Mercruiser combined both parts into one. Once I removed the old single seal, the one piece water pump base fit. I'll be ready for next season now.
 

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