Mercury Force 90 H.P. 1991-1992, Gear Housing - parts catalog
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Gear Housing
(1991-1992) - 1991E thru 1992C| Parts Diagram | ## | Part # | Description | Qty | Notes |
 | -- | 1600-817925A5 | Gear housing assembly complete-painted-1.931 type a & b | 1 | discontinued |
| 1 | 1600-817925A5 | Gear housing kit basic-painted type a & b | 1 | discontinued, replaces 1600-819190A3 | |
| -- | 1600-820588T1 | Gear housing assembly complete-painted-1.931 type c | 1 | discontinued, replaces 1600-820588A1 | |
| 1 | 1600-819231A13 | Gear housing kit basic-painted type c | 1 | ||
| -- | 1600-820588T1 | Gear housing assembly complete.-painted-1.931 type d | 1 | discontinued SN# 0E016973 thru 0E093699, replaces 1600-820588A1 | |
| -- | 1600-820588T7 | Gear housing assembly hi-alt - painted-2.21 type d | 1 | discontinued SN# 0E016973 thru 0E093699, replaces 1600-820588A7 | |
| 1 | 1600-820588A6 | Gear housing kit basic-painted type d | 1 | discontinued SN# 0E016973 thru 0E093699 | |
| 2 | 10-79953Q04 | Screw | 3 | replaces 10-F50109 | |
| 3 | 12-191833 | Washer, fiber | 3 | replaces 12-19183 | |
| 4 | 819232 | Anode type c & d | 2 | ||
| 5 | 10-F2317 | Screw, .250-20 x .875 | 2 | ||
| 6 | 826374 | Pin, gear shift arm, w/dl | 1 | ||
| 7 | 25-25007 | O-ring | 1 | ||
| 8 | 45-FS707628 | Driveshaft, lower | 1 | 1.93:1 - type a, replaces 45-FS694628 | |
| 8 | 45-FS707628 | Driveshaft, lower | 1 | 1.93:1-TYPE b&c | |
| 8 | 45-819738A2 | Driveshaft/gear assembly, lower | 1 | 1.93:1 - type d | |
| 8 | 45-820214A1 | Driveshaft/gear assembly, lower | 1 | discontinued 2.2:1 -type c&d | |
| 9 | 31-35924T1 | Bearing assembly | 1 | replaces 31-35924A1 | |
| 11 | 11-35921 | Nut, .625-18 | 1 | replaces 11-826375 | |
| 12 | 12-92721 | Washer | 1 | ||
| 13 | 31-42647A1 | Bearing assembly, roller | 1 | ||
| 14 | 15-819415A1 | Shim set | AR | discontinued 1 | |
| 15 | 8245191 | Retainer, driveshaft bearing upper | 1 | replaces F694961-1 | |
| 16 | 25-896523 | O-ring, 2.175 x .175, driveshaft cover | 1 | replaces 25-90011 | |
| 17 | FK721706 | Cover type a | 1 | discontinued | |
| 17 | 818074A1 | Cover assembly type b & c & d | 1 | ||
| 18 | 26-819740 | Seal, driveshaft water pump | 1 | ||
| 19 | 26-89238 | Seal, driveshaft | 1 | replaces 26-F694305 | |
| 20 | 26-817472 | Seal, gear shift rod, lower | 1 | ||
| 21 | 10-28668 | Screw, .250-20 x .875 | 2 | replaces 10-F1999 | |
| 22 | 13-26992 | Lock washer, .250 stainless steel | 2 | ||
| 23 | 25-F707305 | O-ring, cover | 1 | ||
| 24 | F694705 | Rod, gear shift, lower type a | 1 | discontinued | |
| 24 | F523705-1 | Rod, gear shift, lower type b & c & d | 1 | ||
| 25 | FA84621-1 | Coupling, gear shift | 1 | discontinued | |
| 26 | F707885 | Retainer, pitot plug | 1 | discontinued | |
| 27 | 892827 | Plug, pitot tube | 1 | discontinued, replaces F694226 | |
| 28 | 22-85822A12 | Connector assembly | 1 | discontinued | |
| 30 | 27-F694830 | Gasket, water pump lower | 1 | ||
| 31 | F699562 | Plate, water pump | 1 | ||
| 32 | 27-F694031 | Gasket, water pump, upper | 1 | ||
| 33 | 47-89984T3 | Impeller, water pump | 1 | replaces 47-F694065 | |
| 34 | 28-F694498 | Key, driveshaft | 1 | ||
| 35 | F694564-1 | Insert, water pump | 1 | ||
| 36 | 46-803757T | Body, water pump | 1 | replaces 46-F694060-2 | |
| 37 | 10-F2234 | Screw, #10 x 1.125 - type b & c & d | 1 | discontinued | |
| 38 | 16-30667 | Stud, .250-28X3.12 with dri-loc | 4 | replaces 16-826372 | |
| 39 | 12-71055 | Washer | 4 | ||
| 40 | 11-8267119 | Nut, .250-28 | 4 | replaces 11-13438 | |
| 41 | 25-F695830 | Gasket | 1 | ||
| 42 | 15-819416A1 | Shim set | AR | discontinued 1 | |
| 43 | 43-816434A5 | Gear, forward 1.931 - type a | 1 | replaces 43-FS694023 | |
| 43 | 43-816434A5 | Gear, forward 1.931 - type b & c | 1 | replaces FS707023 | |
| 43 | 43-816434A5 | Gear assembly, forward 1.931 - type d | 1 | ||
| 43 | 43-819287A2 | Gear assembly, forward 2.21 - type c & d | 1 | discontinued | |
| 44 | 23-819414A1 | Spacer set 89A thru 92C models | AR | discontinued 1 | |
| 45 | 52-816433T | Clutch, shift | 1 | replaces 52-816433 | |
| 46 | 17-8M0029889 | Pin, spring | 1 | replaces 17-F2419 | |
| 47 | 17-F84871-1 | Pin, shift | 1 | discontinued | |
| 48 | F90619-2 | Yoke, gear shift | 1 | ||
| 49 | 44-FA694098 | Propeller shaft assembly type a | 1 | discontinued | |
| 49 | 44-819284A3 | Propeller shaft assembly type b & c & d | 1 | discontinued | |
| 50A | 43-803843T | Gear assembly, reverse 1.931 - type a | 1 | discontinued, replaces 43-F2A694662 | |
| 50 | 43-816435 | Gear, reverse 1.931 - type b & c & d | 1 | ||
| 50 | F722662 | Gear, reverse 2.21 - type c & d | 1 | discontinued | |
| 51 | 31-12576 | Bearing, thrust | 1 | ||
| 52 | F707902 | Ring, thrust | 1 | discontinued | |
| 52A | 17-85500 | Pin, locating | 1 | replaces 17-F8580 | |
| 53 | 803906T | Spool, prop shaft | 1 | replaces FA707239 | |
| 54 | 31-12578T | Bearing, needle | 1 | replaces 31-12578 | |
| 55 | 31-30956T | Bearing, needle | 1 | replaces 31-30956 | |
| 56 | 26-14077 | Seal, prop shaft spool | 1 | replaces 26-F697555 | |
| 57 | 26-12224 | Seal, oil, prop shaft spool | 1 | ||
| 58 | 25-F707278 | Seal, prop shaft spool | 1 | ||
| 59 | 14-F707286 | Washer, tab | 1 | discontinued | |
| 60 | 819217 | Retainer | 1 | ||
| 61 | 14-816629Q | Tab washer | 1 | replaces 14-816629 | |
| 62A | 23-F523099-1 | Spacer type a | 1 | ||
| 62 | 803890T | Spacer type b & c & d | 1 | replaces F698099-1 | |
| 62 | 23-819057 | Spacer type b & c & d | 1 | ||
| 63 | propeller | Propeller, reference propeller application charts in accessories guide-propeller tab | 1 | ||
| 64 | F697299 | Washer type b & c & d | 1 | ||
| 64 | 12-F523282 | Washer type b & c & d | 1 | discontinued | |
| 65 | 11-52707Q1 | Prop nut kit, .750-16 | 1 | replaces 11-52707A1 | |
| 66 | 17-F85372 | Pin, gear shift rod lower | 1 | ||
| 67 | 18-F1015 | Cotter pin | 1 | ||
| 68 | 819176 | Retainer, shift rod seal | 1 | ||
| 69 | F698735-1 | Seal, exhaust | 1 | discontinued | |
| 70 | F694125 | Coupling, driveshaft | 1 | discontinued | |
| 71 | 53-818826 | Ring, retaining | 1 | discontinued | |
| 72 | 45-F694128 | Driveshaft, 20.00 inch | 1 | ||
| 72 | 45-F693128 | Driveshaft, 25.00 inch | 1 | discontinued | |
| 73 | 23-F438271 | Retainer, driveshaft spline seal | 1 | limited availability | |
| 74 | 25-819427 | Seal, driveshaft spline | 1 | ||
| 75 | 26-F694735-1 | Seal, waterline | 1 | ||
| 76 | 32-F523244 | Line, water inlet, 20 inch | 1 | discontinued | |
| 76 | 32-F500244 | Line, water inlet, 25 inch | 1 | discontinued | |
| 77 | 25-817491 | Grommet, .56 inside diameter | 1 | ||
| 78 | 25-F84342 | Seal, inlet waterline upper | 1 | ||
| 79 | F692117 | Bracket, waterline | 1 | limited availability | |
| 80 | 10-28636 | Screw, .250-20 x .750 | 2 | ||
| 81 | 10-F1491 | Screw, .312-18 x 3.75 | 6 | replaces 10-19924325 | |
| 82 | 10-19924100 | Screw, .312-18 x 1.00 | 1 | limited availability | |
| 83 | 12-F506186 | Washer, .340 x .734 x .105 stainless steel | 7 | ||
| 84 | F523116-4 | Snout, exhaust | 1 | ||
| 85 | 10-826377 | Screw, .312-18X.75, exhaust snout, w/dl | 1 | ||
| 86 | 10-19928100 | Screw, .312-18 x 1.00 | 1 | limited availability | |
| 87 | 12-F1856 | Washer | 1 | discontinued | |
| 88 | FK1203-1 | Seal kit | 1 | ||
| 89 | FK1204-1 | Pump kit, water | 1 | ||
| 90 | F707485 | Anode type b | 1 | limited availability | |
| 91 | 10-F1885 | Bolt, 5/16-18 x 4.25 - type a | 4 | discontinued | |
| 92 | 12-12038 | Washer | 4 | ||
| 93 | 25-62702 | O-ring, .301 x .070 | 4 | ||
| 94 | 10-F1112 | Screw, .25-20 x .875 - type a | 2 | discontinued | |
| 95 | 13-26992 | Lock washer, .250 stainless steel | 2 | ||
| 96 | 16-F694211 | Stud | 1 | discontinued | |
| 97 | 12-F8143 | Washer | 1 | discontinued | |
| 98 | 11-29488 | Nut, #10-32 - type a | 1 | limited availability | |
| 99 | F694615 | Rod, intermediate shift -type a | 1 | discontinued | |
| 100 | 53-F523411 | Ring, retaining, type a | 1 | discontinued | |
| 101 | 25-32507 | O-ring, 3.359 x .139 | 1 | ||
| 102 | 803940T | Spool assembly, propeller shaft type a | 1 | discontinued, replaces F2A523239 | |
| 103 | 31-30956T | Bearing, needle, roller -type a | 1 | replaces 31-30956 | |
| 104 | 26-F506118-1 | Seal, propeller shaft spool -type a | 1 | ||
| 105 | 25-F24278 | Seal, propeller shaft spool -type a | 1 | ||
| 106 | FA523485 | Anode, anti corrosion type a | 1 | discontinued | |
| 107 | 12-F523282 | Washer, splined -type a | 1 | discontinued | |
| 108 | 12-F8167 | Washer, .750 | 1 | ||
| 109 | 23-F694043-2 | Sleeve | 2 | discontinued | |
| 110 | 17-F8586 | Pin, dowel | 1 | ||
| 111 | 10-28668 | Screw, .250-20 x .875, type a | 4 | replaces 10-F1999 | |
| 112 | 13-26992 | Lock washer, .250 stainless steel, type a | 4 | ||
| -- | 892991 | Seal, exhaust not all models | 1 | replaces F719735-1 | |
| -- | FK719059 | Repair kit, gear housing skeg | AR | ||
| -- | FK1203-1 | Seal kit | |||
| -- | FK1204-1 | Pump kit, water |
Parts list covers the following S/N:
1991E thru 1992C
