Johnson 1978 9.90 - 10E78M, Gearcase - parts catalog
Gearcase
(1978) - 10E78M| Parts Diagram | ## | Part # | Description | Qty | Notes |
 | 0388001 | 0388001 | Gear case assembly, less drive shaft and pump. not shown | 1 | |
| 1 | 0388276 | Bearing housing, bearing and seal assembly | 1 | ||
| 2 | 0321481 | Seal, bearing housing to propeller shaft | 2 | ||
| 3 | 0386125 | Bearing, reverse gear | 1 | ||
| 4 | 0386231 | Bearing | 1 | ||
| 5 | 0318877 | Cradle, clutch dog | 1 | ||
| 6 | 0304071 | Screw, bearing housing to gear case | 2 | ||
| 7 | 0308627 | O-ring, bearing housing to gear case | 1 | ||
| 8 | 0318861 | Gear, reverse | 1 | ||
| 9 | 0322097 | Propeller shaft | 1 | ||
| 10 | 0316505 | Spring, detent | 1 | ||
| 11 | 0316506 | Ball, detent | 2 | ||
| 12 | 0316501 | Shifter, clutch dog | 1 | ||
| 13 | 0388416 | Shifter lever and yoke assembly | 1 | ||
| 14 | 0308376 | Pivot pin, shifter lever | 1 | ||
| 15 | 0386076 | Gear and bushing assembly, forward | 1 | ||
| 16 | 0386186 | Roller bearing, forward gear | 1 | ||
| 17 | 0322341 | Pinion, drive shaft | 1 | ||
| 18 | 0322202 | Thrust washer, lower pinion bearing | 1 | ||
| 19 | 0388000 | Thrust bearing, pinion | 1 | ||
| 20 | 0322201 | Thrust washer, upper pinion bearing | 1 | ||
| 21 | 0388002 | Gear case, bearing and seal assembly | 1 | ||
| 22 | 0386014 | Bearing assembly, drive shaft | 1 | ||
| 23 | 0318874 | Sleeve, bearing drive shaft | 1 | ||
| 24 | 0321480 | Seal, gear case to drive shaft | 2 | ||
| 25 | 0301877 | O-ring, bushing to shift rod | 1 | ||
| 26 | 0304765 | Bushing, shift rod | 1 | ||
| 27 | 0321738 | Washer, seal, shift rod | 1 | ||
| 28 | 0386071 | Bearing assembly, pinion to gear case | 1 | ||
| 29 | 0318991 | Screen, water intake | 1 | ||
| 30 | 0307551 | Plug and washer | 2 | ||
| 31 | 0311598 | Washer | 1 | ||
| 32 | 0318966 | Thrust bushing, propeller | 1 | ||
| 33 | 0324334 | Screw, impeller housing to gear case, short | 2 | ||
| 34 | 0324474 | Screw, impeller housing to gear case, long | 2 | ||
| 35 | 0319085 | Seal, impeller housing | 1 | ||
| 36 | 0301551 | Washer, connector to shift rod | 2 | ||
| 37 | 0302497 | Grommet, water tube lower | 1 | ||
| 38 | 0388289 | Impeller housing. and seal assembly | 1 | ||
| 39 | 0318972 | Seal, impeller housing to drive shaft | 1 | ||
| 40 | 0386084 | Impeller assembly | 1 | ||
| 41 | 0300611 | Pin, impeller to drive shaft | 1 | ||
| 42 | 0318995 | Plate, impeller to drive shaft | 1 | ||
| 43 | 0321455 | Drive shaft, standard | 1 | ||
| 44 | 0552906 | Cotter pin, propeller nut to shaft | 1 | ||
| 45 | 0318971 | Nut, propeller | 1 | ||
| 46 | 0318959 | Thrust washer, propeller shaft, rear | 1 | ||
| 47 | 0318992 | Shift rod, lower standard | 1 | ||
| 48 | 0304024 | Screw, shift rod connector | 2 | ||
| 49 | 0303794 | Connector, shift rod | 1 | ||
| 50 | 0322087 | Cup, impeller housing | 1 | ||
| 51 | 0386118 | Propeller, 9-1 2 X10 | 1 | ||
| 51 | 0386669 | Propeller, 10 X 5 | 1 | ||
| 51 | 0387389 | Propeller, 9-1 4 x 8. sailboat model only | 1 | ||
| 51 | 0386670 | Propeller, 9 x 10 | 1 | ||
| 52 | 0319484 | Converging ring | 1 | ||
| 53 | 0386119 | Propeller bushing assembly | 1 | ||
| 54 | 0303067 | O-ring, drive shaft | 1 | ||
| 55 | 0308744 | Screw, gear case to extension. housing | 6 | ||
| 0386710 | 0386710 | Extension kit assembly not shown | 1 | ||
| 35 | 0319085 | Seal, impeller housing. to extension | 1 | ||
| 36 | 0301551 | Lock washer, connector screw | 2 | ||
| 43 | 0321456 | Drive shaft, long | 1 | ||
| 47 | 0319298 | Shift rod, lower, long | 1 | ||
| 48 | 0304024 | Screw, connector | 2 | ||
| 49 | 0303794 | Connector, shift rod | 1 | ||
| 54 | 0303067 | O-ring, drive shaft to crank shaft | 1 | ||
| 56 | 0308744 | Screw, extension | 6 | ||
| 57 | 0319340 | Extension, impeller housing to exhaust housing to exhaust housing | 1 | ||
| 58 | 0320025 | Tube, water | 1 | ||
| 59 | 0202893 | O-ring, water tube extension | 1 | ||
| 60 | 0319314 | Extension, gear case | 1 | ||
| 60 | 0123023 | Extension, gear case. sailboat model only | 1 | ||
| 61 | 0389112 | Water pump repair kit | 1 | ||
| 62 | 0389114 | Chrome pump kit | 1 |
Parts catalog covers:
10E78M
