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Mercury 40 Service Manual

Mercury 40
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BIGFOOT GEAR HOUSING
90-828631R3 MARCH 1999 Page 6B-13
Disassembly
Water Pump
NOTE: If water tube seal stayed on water tube (inside of driveshaft housing) when gear
housing was removed, pull water tube seal from water tube.
1. Replace water tube seal, if damaged.
2. Remove 4 bolts, washers, and isolators.
3. Remove cover.
19212
a
b
c
b
a-Water Tube Seal
b-Bolts (4 each)
c-Cover
IMPORTANT: The circular groove formed by the impeller sealing bead should be dis-
regarded when inspecting cover (Step 5) and plate (Step 9), as the depth of the groove
will not affect water pump output.
4. Replace cover if thickness of steel at the discharge slots is 0.060 in. or less, or if
groove(s) (other than impeller sealing bead groove) in cover roof are more than 0.030
in. (0.762 mm) deep.
5. Lift impeller, drive key, and gasket from driveshaft.
19220
a
b
c
a-Impeller
b-Drive Key
c-Gasket

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Mercury 40 Specifications

General IconGeneral
BrandMercury
Model40
CategoryOutboard Motor
LanguageEnglish

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