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- Mercruiser and Alpha One (up to 1990) exploded view lower unit parts drawing
- Water pump components, impellers,
seals, shafts and gear sets
- Manufactured by GLM, California. All parts include a 2 year warranty
- Easy to identify photos with OEM Mercury
numbers
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Photo
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Description / OEM #
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Price
(USD)
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Price (Canadian)
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SEI Mercruiser Alpha 1 Gen 2 lower unit
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Item 1
SEI SE116 Aftermarket SEI lower unit Mercruiser Alpha One Gen 2 aftermarket lower unit. For 1991 and up models only, serial numbers OD470000-Up, For 4 cylinder,
V6 and V8 models up to 300 horsepower. Will not replace 2.00 or 2.40 ratio units.
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$1307.89
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$1699.89
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85590 Face seal
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#2 Face seal (now part #85592) 26-816575A2
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$9.89
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$12.89
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89630 Mercruiser water pump impeller
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#3 Impeller 47-43026T2
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$19.89
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$25.89
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31240 Gasket
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#4 Gasket 27-817277-1
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$4.95
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$5.95
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12500 Face plate
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#5 Face plate 817276-1
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$6.95
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$8.95
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30090 Gasket
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#6 Gasket 27-43033-1
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$4.95
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$6.95
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81390 O-ring
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#7 O-ring (5 units) 25-90011
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$9.89
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$12.89
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#8 Oil seal 26-66302
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$12.89
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$16.89
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23200 Mercruiser Retainer
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#9 Retainer 824519-1
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$4.95
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$6.95
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21580 Roller bearing
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#10 Roller bearing (1991-1997) 31-36387A1
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$51.89
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$66.89
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21584 Roller bearing
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#10 Roller bearing (1998 & up) 31-33138A1
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$44.89
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$57.89
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23210 Shim
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#11 Shim 15-42637A1
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$28.89
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$37.89
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11140 Drive shaft
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#12 Drive shaft 45-816919
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$529.95
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$699.95
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85581 Oil seal
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#13 Oil seal 26-816464-1
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$10.89
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$13.89
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81175 O-ring
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#14 O-ring 25-896522
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$4.95
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$6.95
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85140 Seal
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#15 Seal 26-45577-1
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$10.89
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$13.89
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31170 Washer
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#16 Washer (5 units) 12-19183-3
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$14.89
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$19.89
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21731 Draining Screw
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#17 Screw 22-8M0058389
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$10.89
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$13.89
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21610 Pinion bearing
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#18 Roller bearing 31-42647A1
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$43.89
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$57.89
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11091 Alpha 1 Gen 2 Forward gear set
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#19 Forward gear set (1991-95)
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$406.89
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$528.89
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11092 Alpha1 Gen2 Forward gear set
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#19 Forward gear set (1996-up) 43-878087A2
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$424.89
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$551.89
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32800 Washer
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#20 32800 Washer
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$4.95
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$6.95
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11190 Pinion nut
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#21 Pinion nut 11-35921
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$6.89
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$8.89
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12710 Trim tab anode
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#22 Trim tab anode 76214Q5
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$20.89
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$27.89
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11040 Shift crank
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#23 Shift crank 76865
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$67.95
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$89.95
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11030 Mercruiser Alpha 1 Gen 2 Shift spool
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#24 Shift spool 818349T1
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$86.95
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$114.95
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23220 Mercruiser Shim
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#25 Shim (1991-95) 3.500 O.D. 15-47397A1
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$18.89
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$23.89
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23221 Alpha 1 Gen 2 Shim
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#25 Shim (1996-up) 3.265 O.D. 15-44491A1
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$9.89
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$12.89
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21590 Bearing
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#26 Bearing (1.875 I.D./3.500 O.D.) 31-35928T1
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$63.89
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$82.89
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21591 Mercruiser Bearing
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#26 Bearing (1.750 I.D./3.500 O.D.) 31-828437A2
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$52.89
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$67.89
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21593 Bearing
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#26 Bearing (1.875 I.D./3.265 O.D.) 31-828439A2
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$128.95
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$169.95
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21820 Bearing
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#26 Bearing (1.750 I.D./3.265 O.D.) 31-30894A1
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$47.89
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$61.89
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11420 Roller bearing
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#27 Roller bearing 31-30895T
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$19.89
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$25.89
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11050 Spring
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#28 Spring 24-30893
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$4.95
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$6.95
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21131 Cross pin
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#29 Cross pin 17-8M0020941
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$4.95
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$6.95
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11060 Clutch
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#30 Clutch 52-853594T
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$170.89
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$221.89
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11155 Alpha 1 Gen 2 Prop shaft
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#31 Prop shaft 43-850308
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$349.89
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$455.89
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11013 Mercruiser Reverse gear
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#32 Mercruiser Reverse gear 43-828073A1
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$250.95
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$330.95
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#33 Thrust ring 68100-1
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$11.95
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$15.95
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21620 Ball bearing
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#34 Ball bearing 30-88957T
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$43.89
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$57.89
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83445 O-ring
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#35 O-ring (1 unit) 25-896524
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$4.95
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$6.95
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11410 Roller bearing
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#36 Roller bearing 31-30956T
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$19.99
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$25.99
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85130 Oil seal
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#37 Oil seal 26-14077
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$10.89
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$13.89
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85700 Oil seal
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#38 Oil seal 26-12224
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$15.89
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$19.89
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11381 Tab washer
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#39 Tab washer 14-18323
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$18.89
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$23.89
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21120 Cover nut
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#40 Cover nut 8M2011027
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$22.89
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$29.89
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21301 Thrust hub
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#41 Thrust hub 12-835467Q01
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$29.89
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$37.89
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#42 Lock washer 13-42351-1
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$4.95
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$6.95
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21360 Tab washer receiver
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#43 Tab washer receiver 12-31211Q03
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$8.89
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$10.89
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21200 Tab washer
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#44 Tab washer 14-816629Q
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$4.95
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$6.95
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21250 Prop nut kit
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#45 Nut 11-52707Q1
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$13.89
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$17.89
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11405 Bearing carrier
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#46 Bearing carrier 818763A10
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$157.95
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$207.95
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21031 Mercruiser Alpha 1 Gen 2 Lower shift shaft
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#47 Mercruiser Alpha 1 Gen 2 Lower shift shaft 815919A1
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$56.95
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$74.95
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85850 Sleeve
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#48 Sleeve 26-42133
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11071 Key
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#49 Key 28-43037
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$4.95
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$6.95
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12341 Carrier assembly pump housing
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#50 Carrier assembly pump housing 807929A1
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$28.89
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$36.89
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21015 Shift bushing
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#51 Shift bushing (now part #21017) 23-815921A21
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$19.95
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$25.95
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12702 Anode assembly
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#52 Anode assembly 806105Q1
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$22.89
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$29.89
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12824 Coupling assembly
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#53 Coupling assembly 816597A1
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$13.89
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$17.89
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12825 Guide tube
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#54 Guide tube 23-816583
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$6.89
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$8.89
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12834 Screw
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#55 Screw 10-816928
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$4.95
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$6.95
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21741 Screw
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#56 Screw 10-806327
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$4.95
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$6.95
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#57 E-ring 53-29641
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$4.95
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$6.95
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82110 O-ring
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#58 O-ring 25-21836
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11012 Thrust spacer
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#59 Thrust spacer 23-824108
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$4.95
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$6.95
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88180 Filler block
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#60 Filler block 821526
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12832 Screw
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#61 Screw 10-806290
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$4.95
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$6.95
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21491 Lockwasher
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#62 Lockwasher 13-69432
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$4.95
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$6.95
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12413 Pump housing
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#63 Pump housing
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12414 Water pump kit
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#64 Complete water pump kit (now part #12098) 817275Q5
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$111.89
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$144.95
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12043 Water pump service kit |
#65 Water pump service kit 47-43026Q06
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$49.89
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$63.89
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12722 Aluminum anode kit
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#66 Aluminum anode kit 888756Q03
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$42.89
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$55.89
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87511 Alpha 1 Gen 2 Gearcase seal kit
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#67 Alpha 1 Gen 2 Gearcase seal kit 26-816575A3
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$45.89
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$59.89
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12834 Screw
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#68 Screw 10-40003-27
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$4.95
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$6.95
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