Johnson/Evinrude Outboard Lower Gearcase Parts Diagram
The diagram below is applicable for the following models:
- 40, 48 & 50 HP - 1989 thru 2003
| Ref | Description | Sierra # | Replaces | Qty |
|---|---|---|---|---|
| 1 | Gearcase housing | - | 435275 | 1 |
| 2 | Trim tab | - | 340539 | 1 |
| 3 | Anode washer | - | 330266 | 1 |
| 4 | Anode retaining bolt | - | 330930 | 1 |
| 5 | Washer | - | 330265 | 1 |
| 6 | Bolt | - | 313697 | 1 |
| 7 | Washer | - | 330266 | 4 |
| 8 | Bolt | - | 305282 | 4 |
| 10 | O-ring | 18-4253-9 | 336982 | 1 |
| 11 | Upper drain plug | 18-1236 | 309243 | 1 |
| 12 | Seal | 18-7475 | 332584 | 1 |
| 13 | Retaining screw | - | 324852 | 1 |
| 14 | Screw o-ring | 18-7109 | 317178 | 1 |
| 15 | Shift lever screw | - | 333770 | 1 |
| 16 | Drain plug gasket | 18-4248 | 311598 | 1 |
| 17 | Lower drain fill plug | 18-2378 | 318544 | 1 |
| 18 | Water intake screen | - | 332494 | 2 |
| 19 | Inlet screen retainer bolt | - | 325539 | 2 |
| 20 | Shifter cradle | - | 332507 | 1 |
| 21 | Shift lever | - | 332492 | 1 |
| 22 | Shift rod connector | - | 332508 | 1 |
| 23 | Connector pin | - | 302504 | 1 |
| 24 | Cotter pin | - | 306376 | 1 |
| 25 | Shift rod cover o-ring | - | 338522 | 1 |
| 26 | Shift rod cover | 18-1729 | 434588 | 1 |
| 27 | Shift rod cover bolt | - | 316037 | 2 |
| 28 | Shift rod o-ring | 18-7137 | 318372 | 1 |
| 29 | Shift rod bushing | - | 333780 | 1 |
| 30 | Shift rod (standard) | - | 332509 | 1 |
| Shift rod (long) | - | 332510 | 1 | |
| 31 | Prop nut | 18-3705 | 314503 | 1 |
| 32 | Cotter pin | 18-3742 | 314502 | 1 |
| 33 | Prop spacer | 18-4226 | 315810 | 1 |
| 34 | Prop thrust washer | 18-4230 | 320305 | 1 |
| 35 | Bearing housing anode | - | 398873 | 1 |
| 36 | Anode retaining bolt | - | 328694 | 2 |
| 37 | Prop shaft oil seals | 18-2060 | 321467 | 2 |
| 38 | Needle bearing | 18-1355 | 386765 | 1 |
| 39 | Bearing carrier assembly | 18-1708 | 432276 | 1 |
| 40 | Retaining tabs | 18-1343 | 332495 | 2 |
| 41 | Carrier retaining bolt | - | 328744 | 2 |
| 42 | Bearing housing o-ring | 18-7172 | 553126 | 1 |
| 43 | Needle bearing | 18-1354 | 386764 | 1 |
| 44 | Reverse gear thrust washer | 18-0196 | 332514 | 1 |
| 45 | Reverse gear thrust bearing | 18-1363 | 397537 | 1 |
| 46 | Reverse gear | 18-2309 | 332489 | 1 |
| 47 | Spring clutch | 18-2398 | 320311 | 11 |
| 48 | Sliding clutch | 18-2308 | 332491 | 1 |
| 49 | Clutch cross pin | - | 320310 | 1 |
| 50 | Shifter spring | - | 332484 | 1 |
| 51 | Forward & pinion gear set | 18-2310 | 397627 | 1 |
| 52 | Forward gear thrust bearing | 18-1364 | 397538 | 1 |
| 53 | Forward gear thrust washer | 18-0197 | 333725 | 1 |
| 54 | Outer forward bearing | 18-1351 | 382407 | 1 |
| 55 | Forward gear thrust bearing | 18-1369 | 432264 | 1 |
| 56 | Propeller shaft | 18-2288 | 439138 | 1 |
| 57 | Shift dog shaft | - | 332503 | 1 |
| 58 | Detent ball | 18-2243 | 316506 | 3 |
| 59 | Pinion nut | - | 313339 | 1 |
| 60 | Forward & pinion gear set | 18-2310 | 397627 | 1 |
| 61 | Pinion bearing | 18-1356 | 382343 | 1 |
| 62 | Driveshaft (standard) | - | 433066 | 1 |
| Driveshaft (long) | 18-1721 | 433067 | 1 | |
| 63 | Thrust washer | 18-0201 | 333771 | 2 |
| 64 | Driveshaft thrust bearing | 18-1368 | 398901 | 1 |
| 65 | Shim (.003) | - | 313273 | AR |
| Shim (.004) | - | 313274 | AR | |
| Shim (.005) | - | 313275 | AR | |
| Shim (.006) | - | 313276 | AR | |
| Shim (.007) | - | 313277 | AR | |
| 66 | Gear housing o-ring | 18-7173 | 310327 | 1 |
| 67 | Upper driveshaft retaining cap | - | 435274 | 1 |
| 68 | Driveshaft retaining bolt | - | 317624 | 3 |
| 69 | Lower seal | 18-2059 | 321466 | 1 |
| 70 | Upper seal | 18-2064 | 332205 | 1 |
| 71 | Impeller gasket | 18-2709 | 336530 | 1 |
| 72 | Impeller plate | NSS | 341038 | 1 |
| 73 | Impeller key | 18-3138 | 334897 | 1 |
| 74 | Impeller | 18-3104-1 | 432941 | 1 |
| 75 | Skirting insert | NSS | 324980 | 1 |
| 76 | Insert top plate | 18-3126 | 321940 | 1 |
| 77 | Rubber seal | 18-7481 | 324981 | 1 |
| 78 | Water pump housing | 18-3129 | 438544 | 1 |
| 79 | Water pump housing bolt | 18-3369 | 302325 | 4 |
| 80 | Gear housing seal kit | 18-2694 | 433550 | 1 |
| 81 | Water pump repair kit | 18-3394 | 433548 | 1 |
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