Oil Pump; Removal; Disassembly - Mercury MerCruiser Service Manual

Oil Pump

Removal

1. Remove the oil pump screw.
c
a
2. Remove the oil pump.

Disassembly

IMPORTANT: No service parts are available for the pump.
1. Remove the pump cover.
IMPORTANT: Gear teeth must be marked for exact positioning when reassembled.
2. Make alignment marks on the idler gear and drive gear teeth.
3. Remove the idler gear and drive gear from the pump body.
The plunger and diaphragm are spring‑loaded and can be forcefully expelled from the diaphragm body. Always wear eye
protection when servicing the fuel pump diaphragm body. Use caution when removing the diaphragm retaining pin.
4. Remove the retaining pin, spring, and pressure regulator valve from the pump cover.
IMPORTANT: The suction pipe and pickup screen assembly are not serviceable and should not be removed.
90-8M0099748 eng DECEMBER 2015
a -
d
b -
c -
d -
b
55081
Driveshaft
Driveshaft retainer
Oil pump
Screw
CAUTION
!
© 2016 Mercury Marine
Engine Disassembly
Page 3A-39