Mercury Force 120 H.P. 1990 L-Drive, Power Head - parts catalog
USA - EU
Power Head
(1990) - 120LD90B| Parts Diagram | ## | Part # | Description | Qty | Notes |
 | 1 | 800-818154A21 | Cylinder | 1 | discontinued, replaces FA720010 |
| 800-819359A4 | Short block, cylinder w/rods, pistons and crankshaft | 1 | discontinued, replaces FC723010 | ||
| 2 | 10-F1874 | Screw, 3/8 - 16 x 3-1/8 | 1 | discontinued | |
| 3 | 10-47688 | Screw, 3/8 - 16 x 2-3/4 | 1 | replaces F1009 | |
| 4 | 12-F8104 | Washer | 4 | discontinued | |
| 5 | 10-28636 | Screw, 1/4 - 20 x 3/4 | 14 | replaces F1864 | |
| 6 | 10-94207 | Screw, 3/8 - 16 x 2 | 4 | replaces F1253 | |
| 7 | 10-32132 | Screw, 3/8 - 16 x 1-3/4 | 2 | replaces F1872 | |
| 8 | 10-53734 | Screw, 3/8 - 16 x 3 | 2 | replaces F1873 | |
| 9 | 10-F1699 | Screw, 1/4 - 20 x 1-1/8 | 1 | discontinued | |
| 10 | 10-F1504 | Screw, 1/4 - 20 x 1-1/4 | 2 | ||
| 12 | 17-20433 | Dowel pin | 2 | discontinued, replaces F8563 | |
| 13 | 10-98254 | Screw, 1/4 - 20 x 5/8 | 13 | replaces F1502 | |
| 14 | 817790A1 | Cover, transfer port | 3 | discontinued | |
| 15 | 27-820500A3 | Gasket, transfer port cover | 4 | replaces F40223 | |
| 16 | 27-8246152 | Gasket, cylinder head | 1 | replaces F476529-3 | |
| 17 | 900-819777T4 | Head | 1 | discontinued, replaces F720518 | |
| 18 | F665995 | Cover, cylinder head | 1 | ||
| 19 | 33-896329824 | Spark plug Champion UL-18V | 4 | replaces 33-8180071 | |
| 20 | 12-34437 | Washer | 18 | replaces F1987 | |
| 21 | 10-F1883 | Screw, 5/16 - 18 x 2-3/8 | 18 | ||
| 22 | 10-28668 | Screw, 1/4 - 20 x 7/8 | 4 | replaces F1203 | |
| 23 | 26-F664914 | Seal | 1 | ||
| 24 | F664068 | Thermostat 130 | 7.92 | ||
| 25 | 24-F664268 | Spring | 1 | ||
| 26 | 27-828319 | Gasket | 1 | replaces F476067 | |
| 27 | 819693 | Cover | 1 | replaces F476066-1 | |
| 28 | 10-F1107 | Screw, 1/4 - 20 x 3/4 | 4 | ||
| 29 | 53-F428096 | Ring, retaining | 1 | ||
| 30 | 2 | Thermo switch | 1 | replaces F695449-1 | |
| 31 | 1 | Gasket, exhaust port plate | 2 | replaces F695154 | |
| 32 | F698151 | Plate, exhaust port | 1 | discontinued | |
| 33 | 819313A2 | Manifold, exhaust port | 1 | replaces F723168-1 | |
| 34 | 10-F2237 | Screw, 1/4 - 20 x 3 | 25 | discontinued | |
| 35 | 22-47945 | Plug | 1 | replaces F19109 | |
| 37 | 2 | Gasket set | 1 | replaces FG1026-1 | |
| 39 | 37-F693398 | Decal, wiring | 1 | discontinued | |
| 40 | FK686943 | Tube, water jacket top | 1 | discontinued, replaces F686943 | |
| 41 | 32-F719418 | Tube, water jacket | 2 | ||
| 42 | 17-F719372 | Pin | 2 | ||
| 43 | 23-8283111 | Spacer, thermostat seal | 1 | replaces F719902 |
Parts list covers the following S/N:
120LD90B
