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You are here:Home > Mercury Outboard Models > 1974 - 1976 > Merc 25SS > Lower Unit
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SHEAR PIN
Our Price: $1.25

SHEAR PIN - See model guide for application
VENT SCREW KIT
List Price: $2.90
Our Price: $1.95
You save $0.95!

Gear Case Vent screw with gasket for gear cases of many smaller Mercury Outboards.
GEARCASE DRAIN SCREW WITH GASKET
List Price: $5.70
Our Price: $4.35
You save $1.35!

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.
GEAR LUBE
Our Price: $7.80

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.
OIL SEAL
Our Price: $8.15

LOWER UNIT PROP SHAFT SEAL, DRIVE SHAFT SEAL & WATER PUMP COVER SEAL
List Price: $18.50
Our Price: $12.50
You save $6.00!

Lower unit prop shaft seal for KF7, KG4, KG7, KH7, Mark 15, 20, 25

This the driveshaft seal on the KH7.

This is the water pump cover seal for the Merc 200
LOWER UNIT SEAL KIT
Our Price: $37.09

Lower Unit Seal Kit contains all lower unit seals for Mark 30H.