Gearcase - Standard Drive Parts for 1979 Johnson 4 hp 4W79D Outboard Motor

Revise Search: All Years > 1979 > 4 hp > Johnson 4W79D > Gearcase - Standard Drive

NEED PARTS OR KITS?
View diagram and parts list below. Tap to zoom. Scroll down to order.
Each product listed is an OEM or aftermarket equivalent part. [ Example ]

LOOKING FOR A PROP?
• If no prop is listed, try our prop finder.

COMPLETE GEARCASE?
• A complete lower unit may be available for less than $950. Find one HERE

Engine section

Reference numbers in this diagram can be found in a light blue row below — scroll down to order.
Each product listed is an OEM or aftermarket equivalent part. [ Example ]

#1 — 300646 — SCREW, G'CASE HD. TO G'CASE (2 required per assembly)

0300646 - Screw [ More info ]

$9.65 $4.90
10+ In Stock.

#2 — 310327 — O-RING, GEARCASE HEAD (1 required per assembly)

0310327 - O-Ring, Gearcase Head [ More info ]

$4.56
10+ In Stock.

18-7173-9 - O-Ring (PK5) 310327, 25-30224 [ More info ]

$14.99 $12.47
Available to Order: Usually ships within 10 days.

18-7173-9 - O-Ring (PK5) 310327, 25-30224 [ More info ]

$14.99 $12.47
Available to Order: Usually ships within 10 days.

#3 — 383341 — GEARCASE HD. AND BUSH. ASSY (1 required per assembly)

0383341 - Gearcase Head, NLA [ More info ]
Unavailable

#4 — 300599 — SEAL, GEARCASE HEAD (1 required per assembly)
		0300599 - Oil Retainer Seal [ More info ] Unavailable
		0327031 - Oil Seal [ More info ] $13.49 10+ In Stock.
		18-2035 - Seal, 327031 [ More info ] $10.99 $9.95 4 In Stock.

#5 — 385236 — PROP. SHAFT AND GEAR ASSY (1 required per assembly)

0385236 - Prop Shaft Assembly [ More info ]
Unavailable

#6 — 389066 — GEARCASE AND BUSH. ASSY (1 required per assembly)

0389066 - Gearcase Housing and Bushing Assembly, NLA [ More info ]

$139.99
1 In Stock.

#7 — 313608 — PINION, DRIVESHAFT (1 required per assembly)

0313608 - Pinion, Driveshaft [ More info ]

$43.99
10+ In Stock.

#8 — 307551 — PLUG, GEARCASE (1 required per assembly)

0307551 - Drain Screw, Allen Type, Gasket Included [ More info ]

$7.34
10+ In Stock.

18-4255 - Drain Screw, 307551 Allen Type, Gasket Included [ More info ]

$4.89
Available to Order: Usually ships within 10 days.

18-2387 - Drain Plug Slotted or Allen - No Gasket [ More info ]

$8.69
7 In Stock.

#9 — 311598 — WASHER (1 required per assembly)

0311598 - Drain Plug Washer [ More info ]

$1.58
10+ In Stock.

18-42481-9 - Washer, 50PK [ More info ]

$73.09 $67.11
1 In Stock.

18-4248 - Washer 311598 [ More info ]

$1.78
Available to Order: Usually ships within 10 days.

#10 — 300599 — SEAL (1 required per assembly)
		0300599 - Oil Retainer Seal [ More info ] Unavailable
		0327031 - Oil Seal [ More info ] $13.49 10+ In Stock.
		18-2035 - Seal, 327031 [ More info ] $10.99 $9.95 4 In Stock.

#11 — 302030 — SCREW, G'CASE TO HSG., FRT (1 required per assembly)

0302030 - Screw, Bracket [ More info ]
Unavailable

0303398 - Screw, NLA [ More info ]

$4.99
10+ In Stock.

#11 — 315221 — SCREW, G'CASE MTG., LONG (1 required per assembly)

0315221 - Screw, Gearcase Mtg (Long) NLA [ More info ]

$19.99
9 In Stock.

#12 — 321130 — PIN, IMPELLER (1 required per assembly)

0321130 - Impeller Pin [ More info ]

$13.25 $4.13
10+ In Stock.

#13 — 321129 — GROMMET, WATER TUBE (1 required per assembly)

0321129 - Water Tube Grommet [ More info ]

$5.22
2 In Stock.

#14 — 0 — BODY, WATER PUMP. AVAILABLE ONLY IN 387362 WATER PUMP REPAIR KIT (1 required per assembly)

#15 — 321127 — SCREW, WATER PUMP ASSY (2 required per assembly)

0321127 - Screw, Housing [ More info ]

$6.54
10+ In Stock.

#16 — 387361 — IMPELLER ASSY., WATER PUMP (1 required per assembly)
		0387361 - Impeller [ More info ] Unavailable
		0763735 - Impeller (387361) - For Plastic Pump Housings [ More info ] $30.49 $24.97 10+ In Stock.
		18-3090 - Impeller, 763735 [ More info ] $23.49 $21.26 9 In Stock.

#17 — 0 — PLATE, WATER PUMP. AVAILABLE ONLY IN 387362 WATER PUMP REPAIR KIT (1 required per assembly)

#18 — 0 — CUP, IMPELLER BODY. AVAILABLE ONLY IN 387362 WATER PUMP REPAIR KIT (1 required per assembly)

#19 — 0 — SPACER, WATER PUMP. AVAILABLE ONLY IN 387362 WATER PUMP REPAIR KIT (1 required per assembly)

#20 — 313332 — SCREW, G'CASE TO HSG., STD (1 required per assembly)

0313332 - Screw [ More info ]

$5.49
10+ In Stock.

#20 — 315220 — SCREW, GEARCASE MOUNTING (1 required per assembly)

0315220 [ More info ]
Unavailable
Replaced by 0330666

0330666 - Screw, Gearcase to Exhaust Housing [ More info ]

$10.80
1 In Stock.

#21 — 316558 — DRIVE PIN, PROPELLER (1 required per assembly)
		0316558 - Propeller Drive Pin [ More info ] Unavailable
		0326032 - DRIVE PIN 10PK [ More info ] Unavailable
		0333513 - Drive Pin [ More info ] $4.74 10+ In Stock.

#22 — 318487 — PROPELLER, 7-1/2 X 6 (1 required per assembly)

0318487 - Plastic Propeller, 4 HP, 7 1/2 X 6 [ More info ]

$37.64
8 In Stock.

#23 — 313693 — COTTER PIN, PROPELLER NUT (1 required per assembly)

0313693 - COTTER PIN [ More info ]

$1.40
10+ In Stock.

#24 — 324919 — DRIVESHAFT, STD (1 required per assembly)

0324919 - Drive Shaft NLA [ More info ]
Unavailable

#24 — 324921 — DRIVESHAFT, LONG (1 required per assembly)

0324921 - Drive Shaft, Long [ More info ]
Unavailable

#25 — 317466 — CLUTCH HUB, PROP (1 required per assembly)

0317466 - Clutch Hub, Propeller [ More info ]

$24.99
10+ In Stock.

0391598 - Clutch Hub [ More info ]

$49.99
10+ In Stock.

#26 — 310331 — RING, PROP. CLUTCH (1 required per assembly)

0310331 - Prop Clutch Ring [ More info ]

$16.31
6 In Stock.

#27 — 303191 — O-RING (1 required per assembly)

0303191 - Shift Lever O-Ring [ More info ]

$3.44
10+ In Stock.

18-7413-9 - O-Ring (PK5) 25-62702, 303191 [ More info ]

$4.99 $4.73
2 In Stock.

#28 — 323646 — WATER TUBE, LONG (1 required per assembly)

0323646 - Water Tube, NLA [ More info ]
Unavailable

#29 — 386011 — G'CASE EXTENSION ASSY (1 required per assembly)
		0386011 - Gearcase Extension Assy. (5 Inch Longer Parts) [ More info ] $100.00 3 In Stock.
		0391666 [ More info ] Unavailable Replaced by 0394477
		0394477 - Gearcase Ext. Assy. 5 In. Longer Parts [ More info ] $117.67 1 In Stock.

#30 — 310674 — BUSHING, DRIVESHAFT (1 required per assembly)

0310674 - Drive Shaft Bushing [ More info ]

$16.31
Available to Order: Usually ships within 10 days.

#31 — 312321 — SLEEVE, DRIVESHAFT (1 required per assembly)
		0312321 [ More info ] Unavailable Replaced by 0326988
		0326988 [ More info ] Unavailable Replaced by 0326742
		0326742 - Sleeve [ More info ] $18.35 10+ In Stock.