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You are here:Home > Mercury Outboard Models > 1977 - 1979 > Merc 402 > Lower Unit
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O RING
List Price: $1.00
Our Price: $0.85
You save $0.15!

Mark 35A
Mark 50
Mark 55, 55A
Mark 75, 75A
Mark 75A
1960 Merc 300
1961 Merc 350
1984 - 1989 Merc 35 (2 cyl)
1963 - 1969 Merc 350
1980 - 1983 Merc 40 (2 cyl)
1989 - 1996 Merc 40 (4 cyl)
1960 - 1961 Merc 400
1970 - 1971 Merc 400 (2 cyl)
1972 - 1979 Merc 402
1986 - 1989 Merc 45 (4 cyl)
1962 - 1964 Merc 450 (2 cyl)
1986 - 1990 Merc 50 (3 cyl)
1980 - 1985 Merc 50 (4 cyl)
1965 - 1979 Merc 500
1984 - 1990 Merc 60 (3 cyl)
1972 - 1979 Merc 650 (3 cyl)
1977 - 1983 Merc 70 (3 cyl)
1960 - 1961 Merc 700 (6 cyl)
1960 - 1961 Merc 800 (6 cyl)
THERMOSTAT GASKET
List Price: $1.90
Our Price: $1.50
You save $0.40!

Thermostat gasket for thermostat part no. 75692
GEAR HOUSING FLUSHING HOLE PLUG
List Price: $5.10
Our Price: $3.75
You save $1.35!

1969 Merc 1000SS
1972 - 1977 Merc 1150
1968 - 1969 Merc 1250
1970 - 1971 Merc 1350
1972 Merc 1400
1973 - 1977 Merc 1500
1978 Merc 1500XS
1968 - 1977 Merc 200
1977 - 1981 Merc 200,20
1966 - 1969 Merc 350
1970 - 1971 Merc 400 (2 cyl)
1972 - 1977 Merc 402
1968 - 1975 Merc 500
1972 - 1975 Merc 650 (3 cyl)
1968 - 1971 Merc 650 (4 cyl)
1969 - 1972 Merc 800,80 (4 cyl)
1973 - 1977 Merc 850 (4 cyl)
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.
PROP NUT KIT
List Price: $11.60
Our Price: $10.75
You save $0.85!

Prop Nut Kit includes a special locking nut and two tab washers.  For use on Mercury/Mariner 30-60 hp. outboard engines.
ROLLER BEARING
List Price: $13.20
Our Price: $11.53
You save $1.67!

Fits Mercury 18, 20, 25,35, 40, 400, 402, 45, 50, 500, 55, 60, 650,70
THERMOSTAT - 143
List Price: $14.92
Our Price: $12.95
You save $1.97!

Thermostat, 143 degrees.  Used on wide range of Mercury outboards from 7.5 - 225 HP from 1977 - present.  Also prevalently used on Mariner outboards.  See model guide for specific applications.
WATER PUMP IMPELLER
List Price: $19.34
Our Price: $18.00
You save $1.34!

(Replaces 47-20268 & 47-65959)

The following gearshift models:
 all 2 cyl. 35 & 40 HP thru 1989
 all 3 cyl. 50 - 65 HP thru 1990
 all 3 cyl. 70 HP thru 1983
 all 4 cyl 35 - 50 HP
WATER PUMP KIT
Our Price: $35.99

Aftermarket Water Pump Impeller Kit (includes impeller, gaskets, wear plate, etc.) fits all 2 cyl. 35 & 40 HP thru 1989, all 3 cyl. 50 - 65 HP thru 1990, all 3 cyl. 70 HP thru 1983, all 4 cyl 50 HP 1963 and newer.
REPAIR KIT-W/P
List Price: $44.08
Our Price: $38.99
You save $5.09!

Water pump repair kit
Fits the following motors:
35HP (2 cyl) serial# 6445653 and up
400 (40HP) serial# 2874704-3336257
402 (40HP) and 40HP serial# 3336258-G053313
45HP (4 cyl) serial# 5531630 and up
500 (50HP) and 50HP (4 cyl) serial# 2858814 and up
50HP and 60HP (3 cyl) serial# 6428681-D000749
70HP (3 cyl) serial# 4977157-6428680