Mercury Force 90 H.P. 1991-1992, Crankshaft and Piston - parts catalog
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Crankshaft and Piston
(1991-1992) - 1991E thru 1992C| Parts Diagram | ## | Part # | Description | Qty | Notes |
 | 1 | 400-816989A5 | Crankshaft kit | 1 | discontinued 3, 7 |
| 2 | 30-803893T | Bearing, ball, upper | 1 | replaces 30-F284659-2 | |
| 3 | F316579 | Seal, crankcase | 2 | ||
| 4 | 31-818050T4 | Bearing assembly, crankshaft lower main | 1 | replaces 31-FA523014 | |
| 5 | 26-828627 | Seal | 1 | replaces 26-F523146-1 | |
| 6 | 1100-818070A1 | Cage assembly, bearing 91E models | 1 | discontinued | |
| 6 | 1100-819312T4 | Cage assembly, bearing 91H/92C | 1 | discontinued SN# 0E000001 thru 0E0093699 3, 7, replaces 1100-819312A1 | |
| 7 | 26-828627 | Seal | 1 | replaces 26-F523146-1 | |
| 8 | 10-92160 | Screw, .250-20 x .750 stainless steel | 5 | ||
| 9 | 11-F1968 | Nut, .750-16 | 1 | ||
| 10 | 19-F2067 | Cap, plastisol, crankshaft end | 1 | discontinued | |
| 11 | 31-803604T | Bearing assembly, center main | 2 | replaces 31-FA85655-1 | |
| 12 | 53-F85410 | Ring, snap | 2 | discontinued | |
| 13 | 17-823605 | Pin, locating pressed into block | 3 | ||
| 14 | 31-819193 | Cage/roller set | 2 | ||
| 15 | 28-F85498-1 | Flywheel key | 1 | ||
| 16 | 600-818052T6 | Connecting rod assembly | 3 | replaces 600-818052A6 | |
| 17 | 10-91012 | Screw, .250-28 special, connecting rod | 6 | ||
| 18 | 31-62596A2 | Cage/roller set, connecting rod | 3 | ||
| 19 | 700-834797A4 | Piston kit standard | 3 | discontinued 3, 7, replaces 700-819690A1 | |
| 19 | 700-834797A5 | Piston kit .010 o.s | OPT. | discontinued 12, replaces 700-819690A2 | |
| 19 | 700-834797A6 | Piston kit .030 o.s | OPT. | discontinued 12, replaces 700-819690A3 | |
| 20 | 31-F335217-1 | Bearing 26, piston pin | 3 | ||
| 21 | 41-F85017-3 | Pin, piston | 3 | discontinued | |
| 22 | 23-826806 | Spacer, piston pin | 6 | ||
| 23 | 39-820457A2 | Ring set 2 rings, piston standard | 3 | discontinued | |
| 23 | 39-820641A1 | Ring set 2 rings, piston .010 o.s | OPT. | discontinued 12 | |
| 23 | 39-818129A2 | Ring set 2 rings, piston .030 o.s | OPT. | discontinued 12 | |
| - | 27-809748A1 | Gasket set, powerhead | replaces 27-FG1028-2 | ||
| - | 27-820725A1 | Gasket set | |||
| - | 800-817608A22 | Short block | discontinued, replaces 800-817608A6 | ||
| - | 800-817608A22 | Powerhead assembly | discontinued, replaces 800-817608A17 |
Parts list covers the following S/N:
1991E thru 1992C
