Impeller mercrusier 898

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,453
???? You have an Alpha 1 R or MR type or early MC-1 you will need to split the housing to determine whitch one or look for a serial number stamped into the housing below the top plug.
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Since the only drives that came with an 898 were the MC-1, then, assuming the gear housing is still original, a kit for an MC-1 would be the one you need. The only difference between the MC-1/R kit and an MR/Alpha One kit is the water pump base. All the rest is the same. So if you don't need a new base, anything from 1972 to 1990 is good.

BTW, when you do the replacement, DO NOT put the 'o' ring on the top of the drive shaft, leave it off, even if there's a groove for it.

Chris.......
 

Yegboats

Chief Petty Officer
Joined
Feb 20, 2016
Messages
524
Mercruiser water pump chart for reference.
 

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