OMC 400-800 Lower unit repair steps 21-40

OMC 400-800 Lower unit repair steps 21-40

400-800 series installation / repair steps for lower unit.

Last updated on 2/24/2023, 2:26:17 AM

400-800repair photos
Co-manufacturer and distributor for GLM Products including aftermarket with 2 year warranty on parts

Reverse gear and bearings

Gears are installed into housing

Thrust bearing

Retainer plate

Circlips

Retaining circlip is installed

Plate holes lined up

Gasket compound

Gasket sealing compound is applied to the end of the bearing carrier

O ring gasket compound

The o-ring (GLM P/N 82400, replaces 305123) is installed onto the carrier

1/4 inch 28 N.F. thread bolts

Bolts are prepared with compound

Bolts with compound

Bolts are installed into the carrier

Carrier bolts installed

Bearing carrier, which has been sandblasted, primed with bearings installed is then set into the lower unit to secure the propeller shaft

Anode installed

Rear anode is installed (GLM P/N 12776, replaces 436745)

Bearing shims

O ring

Bearing is pressed into housing

Retainer

Bearing housing (OMC 982422), is sandblasted, primed and the o-ring is installed with sealing compound

Magnetic screw

Oil plug / drain screw (GLM P/N 21731, OEM 318544) is installed into the lower unit with the plug gasket

Anode bolt added

Note shim size

Note shifter turns

See rack position

Shifting rod, rack and components are installed and set up