Gearcase - Standard Drive Parts for 1978 Johnson 4 hp 4R78E Outboard Motor
Reference numbers in this diagram can be found in a light blue row below — scroll down to order.
#1 — 300646 — SCREW, G'CASE HD. TO G'CASE (2 required per assembly) | ||
#2 — 310327 — O-RING, GEARCASE HEAD (1 required per assembly) | ||
18-7173-9 - O-Ring (PK5) 310327, 25-30224 [ More info ]
$14.99 $12.47 |
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18-7173-9 - O-Ring (PK5) 310327, 25-30224 [ More info ]
$14.99 $12.47 |
#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 |
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#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 ] |
#7 — 313608 — PINION, DRIVESHAFT (1 required per assembly) | ||
#8 — 307551 — PLUG, GEARCASE (1 required per assembly) | ||
0307551 - Drain Screw, Allen Type, Gasket Included [ More info ] |
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18-4255 - Drain Screw, 307551 Allen Type, Gasket Included [ More info ] |
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18-2387 - Drain Plug Slotted or Allen - No Gasket [ More info ] |
#9 — 311598 — WASHER (1 required per assembly) | ||
#10 — 300599 — SEAL (1 required per assembly) | ||
0300599 - Oil Retainer Seal [ More info ] Unavailable |
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#11 — 302030 — SCREW, G'CASE TO HSG., FRT. (1 required per assembly) | ||
0302030 - Screw, Bracket [ More info ] Unavailable |
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#11 — 315221 — SCREW, G'CASE MTG., LONG 5" LONGER PARTS (1 required per assembly) | ||
#12 — 321130 — PIN, IMPELLER 5" LONGER PARTS (1 required per assembly) | ||
#13 — 321129 — GROMMET, WATER TUBE (1 required per assembly) | ||
#14 — 0 — BODY, WATER PUMP. AVAILABLE ONLY IN WATER PUMP REPAIR KIT 387362 (1 required per assembly) |
#15 — 321127 — SCREW, WATER PUMP ASSY. (2 required per assembly) | ||
#16 — 387361 — IMPELLER ASSY., WATER PUMP (1 required per assembly) | ||
0387361 - Impeller [ More info ] Unavailable |
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0763735 - Impeller (387361) - For Plastic Pump Housings [ More info ] |
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#17 — 0 — PLATE, WATER PUMP. AVAILABLE ONLY IN WATER PUMP REPAIR KIT 387362 (1 required per assembly) |
#18 — 0 — CUP, IMPELLER BODY. AVAILABLE ONLY IN WATER PUMP REPAIR KIT 387362 (1 required per assembly) |
#19 — 0 — SPACER, WATER PUMP. AVAILABLE ONLY IN WATER PUMP REPAIR KIT 387362 (1 required per assembly) |
#20 — 313332 — SCREW, G'CASE TO HSG., STD. (1 required per assembly) | ||
#20 — 315220 — SCREW, GEARCASE MOUNTING 5" LONGER PARTS (1 required per assembly) | ||
0315220 [ More info ] Unavailable Replaced by 0330666 |
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#21 — 316558 — DRIVE PIN, PROPELLER (1 required per assembly) | ||
0316558 - Propeller Drive Pin [ More info ] Unavailable |
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0326032 - DRIVE PIN 10PK [ More info ] Unavailable |
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#22 — 318487 — PROPELLER, 7-1/2 X 6 (1 required per assembly) | ||
#23 — 313693 — COTTER PIN, PROPELLER NUT (1 required per assembly) | ||
#24 — 323381 — DRIVESHAFT, STD. (1 required per assembly) | ||
0323381 - Drive Shaft [ More info ] Unavailable |
#24 — 323666 — DRIVESHAFT, LONG 5" LONGER PARTS (1 required per assembly) | ||
0323666 - Drive Shaft [ More info ] Unavailable |
#25 — 317466 — CLUTCH HUB, PROP. (1 required per assembly) | ||
#26 — 310331 — RING, PROP. CLUTCH (1 required per assembly) | ||
#27 — 202893 — O-RING 5" LONGER PARTS (1 required per assembly) | ||
#28 — 323646 — WATER TUBE, LONG 5" LONGER PARTS (1 required per assembly) | ||
0323646 - Water Tube, NLA [ More info ] Unavailable |
#29 — 386011 — G'CASE EXTENSION ASSY. 5" LONGER PARTS (1 required per assembly) | ||
0386011 - Gearcase Extension Assy. (5 Inch Longer Parts) [ More info ] |
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0391666 [ More info ] Unavailable Replaced by 0394477 |
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0394477 - Gearcase Ext. Assy. 5 In. Longer Parts [ More info ] |
#30 — 310674 — BUSHING, DRIVESHAFT 5" LONGER PARTS (1 required per assembly) | ||
#31 — 312321 — SLEEVE, DRIVESHAFT 5" LONGER PARTS (1 required per assembly) | ||
0312321 [ More info ] Unavailable Replaced by 0326988 |
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0326988 [ More info ] Unavailable Replaced by 0326742 |
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#32 — 323286 — GROMMET, WATER TUBE 5" LONGER PARTS (1 required per assembly) | ||
#33 — 315338 — GASKET, HSG. TO CYLINDER 5" LONGER PARTS (1 required per assembly) | ||
#34 — 323443 — GASKET, HOUSING TO COVER 5" LONGER PARTS (1 required per assembly) | ||
0323443 [ More info ] Unavailable Replaced by 0323936 |
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#35 — 387362 — WATER PUMP REPAIR KIT (1 required per assembly) | ||
0387362 - Water Pump Kit [ More info ] Unavailable |
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#389038 — 389038 — GEARCASE ASSY., COMPLETE. NOT SHOWN (1 required per assembly) | ||
0389038 - Gearcase Assy, Complete. Not Shown [ More info ] Unavailable |
#389220 — 389220 — EXTENSION KIT - 5" 5" LONGER PARTS. NOT SHOWN (1 required per assembly) | ||
0389220 - Extension Kit [ More info ] Unavailable |