Mercury 40 Service Manual

BIGFOOT GEAR HOUSING
Page 6B-14 90-828631R3 MARCH 1999
6. Inspect impeller. Replace impeller if any of the following conditions exist:
• Impeller blade(s) are cracked, torn, or worn.
• Impeller is glazed or melted (caused by operation without sufficient water supply).
• Rubber portion of impeller is not bonded to impeller hub.
7. Remove plate and gasket.
8. Replace plate if groove(s) (other than impeller sealing bead groove) in plate are more
than 0.030 in. (0.762 mm) deep.
19219
a
b
c
a-Plate
b-Gasket
c-Impeller Sealing Groove
9. Remove bolts and washers.
19217
a
a-Bolts and Washers (6 each)

Mercury 40 Specifications

General

Horsepower	40 hp
Starting System	Electric
Steering	Remote
Fuel Induction System	EFI (Electronic Fuel Injection)
Shaft Length	20"
Full Throttle RPM Range	6000