Mark 40H, Mark 55H (SELF-LOCKING)

Gear Case Vent screw with gasket for gear cases of many smaller Mercury Outboards.

Gear Lube Drain screw with gasket for most Mercury lower units.  (Also used as vent screw in 1963 and newer 35HP and larger non-racing gear cases.)

Was 10-79953T2

This is used as both drain & vent on 1974 & prior models.  1975-76 use this for vent screw and 22-67892A06 magnetic drain screw.

Mark 40H, 55H

SHEAR PIN - See model guide for application

Crankcase bearing fits Mark 5, KF5, KF3, Mark 6 & 6A

Propshaft bearing fits Mark 30 & 55H

Gear Grease- 105 Lubriplate replaces original gear grease in all 1, 2, & 4 cyl. Mercurys through 1961. This heavier lube should also be used in non-shift motors of other brands. 10 oz.

Note: Modern 90 weight gear lube is generally unacceptable in these engines.

This is the top crankshaft seal for models K, KB & KD models, KE3, KE4, KE4A, KF3, Mark 7

This is the bottom crankshaft seal on the KF-3 for serial # 358552 thru 358612 and 358616 & up.

This is the drive shaft seal for Mark 10, 10A, 15A, 28, 28A, 40H, 55H, Merc 100, 150, 200, 350, 500, 650

This is the prop shaft seal for Mark 75H

Mark 30H, 55H

Drive shaft bearing for Mark 10, 10A, 15A, 28, 28A, 30H, 55H, Merc 100, 150, 200 & 250

Prop shaft bearing for Mark 5, 6, 6A, KF5 & KF3

Mark 20H
Mark 30H, 55H

Mark 20H, 30H, 55H

Lower Unit Seal Kit contains all lower unit seals for Mark 40 and Mark 55H and all 40 cubic inch engines with Quicksilver Racing lower units and needle bearing style tail cone.