Mercury 40 Service Manual

NON-BIGFOOT GEAR HOUSING
Page 6A-46 90-828631R3 MARCH 1999
Gear Housing Pressure Test
1. Remove vent plug and install pressure test gauge. Tighten securely.
2. Pressurize housing to 10-12 psi (69-83 kPa) and observe gauge for 5 minutes.
3. Rotate drive shaft, prop shaft and move shift rod while housing is pressurized to check
for leaks.
4. If pressure drop is noted immerse housing in water.
5. Re-pressurize to 10-12 psi (69-83 kPa) and check for air bubbles.
6. Repair leak as necessary. Retest housing.
NOTE: It should hold 10-12 psi (69-83 kPa) for 5 minutes.
7. Remove tester from housing and install vent plug.

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