Quicksilver water pump gasket 27-858524 is an original gasket for the water pump on select MerCruiser drives as well as Mercury and Mariner outboards. The gasket is installed between the water pump housing and the wear plate and is used in conjunction with short-vane water pump impellers.
The gasket helps seal the water pump so that cooling water is routed correctly through the pump. Gaskets and seals should be replaced during servicing or when replacing the water pump impeller.
This part is verified for MerCruiser 1, R, MR, and Alpha One drives in the serial number range 2495186-0D469858. It is also used on select Mercury and Mariner outboards from 65 hp with four cylinders through V6 when the engine is equipped with a short-vane water pump impeller. Always check the engine serial number, impeller type, and part number before ordering.
Part number 27-858524 has core number 858524 and replaces the previous numbers 27-30604, 27-32434, 27-85609, 27-856091, and 27-85609B1.
Key featuresOriginal Quicksilver water pump gasket
Part number: 27-858524
Core number: 858524
Installed between the water pump housing and wear plate
For water pumps with short-vane impeller
Fits select MerCruiser, Mercury, and Mariner models
Check serial number and impeller type before purchase
