Alpha One & Gen 2 Outdrive Parts *Drawings *Videos

Alpha One shims and bearings (upper gearcase)

Upper gear case GLM aftermarket Alpha One shims come in packs of 5 Tapered roller bearings for Mercruiser stern drive upper gearcase R/MR and years 1984 - up Exploded view Mercruiser drawing click here P/N 23260 bore size 1.9375 and #23261 bore size 1.7813 available for top cover

21540 Mercruiser Bearing P/N 21540 OEM 31-35990A1 983891 $43.95	23270 P/N 23270 Shim kit OEM 15-36178A1 for bearings # 21540 / 21550 / 21560 $11.99
21520 set P/N 21520 Bearing set (includes spacer) OEM 31-35988A2 $179.99	23280 P/N 23280 OEM 15-35980A1 $12.99
21510 OMC Alpha1 Gen2 Upper cover bearing P/N 21510 1972 to 1995 OEM 31-6100A1 upper cover bearing 1-15/16" $33.99	23260 P/N 23260 OEM 15-45691A1 $9.99
21511 P/N 21511 Bearing (1996 - up) OEM 31-32575A1 $12.99	23261 P/N 23261 kit for P/N 21511 bearing $7.99

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