Mercruiser --> Gearcase Breakdown


Mercruiser
MR & Alpha One

CLICK ON THE PART YOU NEED BELOW
GLM18000
Gear Housing Assembly
---------------------


(OEM: 1623-8951A37)GLM12410
Water Pump Hsg
---------------------


(OEM: 46-96148T1)GLM12810
Cup
---------------------


(OEM: 48752T)GLM89840
Impeller
---------------------


(OEM: 47-89984)GLM23200
Retainer
---------------------


(OEM: 824519-1)GLM12833
Screw
---------------------


(OEM: 10-96411)GLM21180
Nut
---------------------


(OEM: 11-826711-9)GLM12830
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Seal
---------------------


(OEM: 26-38970)GLM12830
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Seal
---------------------


(OEM: 26-38970)GLM12830
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Seal
---------------------


(OEM: 26-38970)GLM12820
Tube Guide
---------------------


(OEM: 23-29804)GLM81160
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring
---------------------


(OEM: 25-30613)GLM81160
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring
---------------------


(OEM: 25-30613)GLM81160
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring
---------------------


(OEM: 25-30613)GLM21190
Nut
---------------------


(OEM: 11-13436)GLM21720
Washer
---------------------


(OEM: 12-36001)GLM11070
Key
---------------------


(OEM: 28-56654)GLM31020
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Gasket
---------------------


(OEM: 27-858524)GLM31020
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Gasket
---------------------


(OEM: 27-858524)GLM31020
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Gasket
---------------------


(OEM: 27-858524)GLM12510
Wear Plate
---------------------


(OEM: 32435)GLM31010
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Gasket
---------------------


(OEM: 27-85608-1)GLM31010
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Gasket
---------------------


(OEM: 27-85608-1)GLM31010
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Gasket
---------------------


(OEM: 27-85608-1)GLM12320
Water Pump Base
---------------------


Water Pump Base
---------------------


(OEM: 46-44292A3)GLM85040
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal
---------------------


(OEM: 26-16977)GLM85040
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal
---------------------


(OEM: 26-16977)GLM85040
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal
---------------------


(OEM: 26-16977)GLM85040
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal
---------------------


(OEM: 26-16977)GLM85070
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal
---------------------


(OEM: 26-89238)GLM85070
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal
---------------------


(OEM: 26-89238)GLM85070
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal
---------------------


(OEM: 26-89238)GLM81390
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring (2.188 I.D.)
---------------------

GLM82270
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring (2.125 I.D.)
---------------------


(OEM: 25-90011)GLM81390
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring (2.188 I.D.)
---------------------

GLM82270
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring (2.125 I.D.)
---------------------


(OEM: 25-90011)GLM81390
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring (2.188 I.D.)
---------------------

GLM82270
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring (2.125 I.D.)
---------------------


(OEM: 25-90011)GLM81390
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring (2.188 I.D.)
---------------------

GLM82270
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring (2.125 I.D.)
---------------------


(OEM: 25-38099)GLM81390
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring (2.188 I.D.)
---------------------

GLM82270
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring (2.125 I.D.)
---------------------


(OEM: 25-38099)GLM81390
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring (2.188 I.D.)
---------------------

GLM82270
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring (2.125 I.D.)
---------------------


(OEM: 25-38099)GLM21580
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Roller Bearing
---------------------


(OEM: 31-36387A1)GLM21580
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Roller Bearing
---------------------


(OEM: 31-36387A1)GLM21580
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Roller Bearing
---------------------


(OEM: 31-36387A1)GLM21580
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Roller Bearing
---------------------


(OEM: 31-36387A1)GLM23210
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Shim
---------------------


(OEM: 15-42637A1)GLM23210
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Shim
---------------------


(OEM: 15-42637A1)GLM23210
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Shim
---------------------


(OEM: 15-42637A1)GLM21800
Washer
---------------------


(OEM: 12-29395)GLM85581
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal
---------------------


(OEM: 26-816464-1)GLM85581
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal
---------------------


(OEM: 26-816464-1)GLM85581
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal
---------------------


(OEM: 26-816464-1)MAL9-76133
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Bushing Assembly
---------------------


(OEM: 23-30617A2)MAL9-76133
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Bushing Assembly
---------------------


(OEM: 23-30617A2)MAL9-76133
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Bushing Assembly
---------------------


(OEM: 23-30617A2)MAL9-76133
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Bushing Assembly
---------------------


(OEM: 23-30617A2)GLM81180
O-Ring
---------------------


(OEM: 25-25439)GLM32790
Washer
---------------------


(OEM: 12-27880)GLM21132
Clip
---------------------


(OEM: 18-20233)GLM21030
Shift Shaft
---------------------


(OEM: 77481-1)GLM85140
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Seal
---------------------


(OEM: 26-45577-1)GLM85140
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Seal
---------------------


(OEM: 26-45577-1)GLM85140
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Seal
---------------------


(OEM: 26-45577-1)GLM21731
Screw
---------------------


(OEM: 22-67892A1)GLM31170
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Washer
---------------------


(OEM: 12-19183-2)GLM31170
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Washer
---------------------


(OEM: 12-19183-2)GLM31170
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Washer
---------------------


(OEM: 12-19183-2)GLM31170
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Washer
---------------------


(OEM: 12-19183-2)GLM21870
Insert (Starboard)
---------------------


(OEM: 93423-1)GLM21880
Insert (Port)
---------------------


(OEM: 93424-1)GLM12822
Screw
---------------------


(OEM: 10-76156)GLM21161
Nut
---------------------


(OEM: 11-45812)GLM21170
Nut
---------------------


(OEM: 11-13439-1)GLM21740
Screw
---------------------


(OEM: 10-32470)GLM22430
Screw
---------------------


(OEM: 10-30206)GLM12670
Trim Tab
---------------------


(OEM: 31640A1)GLM21610
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Roller Bearing
---------------------


(OEM: 31-42647A1)GLM21610
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Roller Bearing
---------------------


(OEM: 31-42647A1)GLM21610
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Roller Bearing
---------------------


(OEM: 31-42647A1)GLM21610
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Roller Bearing
---------------------


(OEM: 31-42647A1)GLM11091
 INCLUDED IN: GLM11312
Foward Gear Set
---------------------

GLM11091
Foward Gear Set
---------------------


(OEM: 43-828072A2)GLM11091
 INCLUDED IN: GLM11312
Foward Gear Set
---------------------

GLM11091
Foward Gear Set
---------------------


(OEM: 43-828072A2)GLM11190
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Nut
---------------------


(OEM: 11-35921)GLM11190
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Nut
---------------------


(OEM: 11-35921)GLM11190
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Nut
---------------------


(OEM: 11-35921)GLM11190
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Nut
---------------------


(OEM: 11-35921)GLM11030
Shift Spool
---------------------


(OEM: 818349T1)GLM11040
Shift Crank
---------------------


(OEM: 76865)GLM23220
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Shim
---------------------


(OEM: 15-47397A1)GLM23220
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Shim
---------------------


(OEM: 15-47397A1)GLM23220
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Shim
---------------------


(OEM: 15-47397A1)GLM23220
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Shim
---------------------


(OEM: 15-47397A1)GLM21590
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
Bearing (I.D. 1.875)
---------------------

GLM21591
Bearing (I.D. 1.750)
---------------------


(OEM: 31-35928T1)GLM21590
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
Bearing (I.D. 1.875)
---------------------

GLM21591
Bearing (I.D. 1.750)
---------------------


(OEM: 31-35928T1)GLM21590
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
Bearing (I.D. 1.875)
---------------------

GLM21591
Bearing (I.D. 1.750)
---------------------


(OEM: 31-35928T1)GLM21590
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
Bearing (I.D. 1.875)
---------------------

GLM21591
Bearing (I.D. 1.750)
---------------------


(OEM: 31-828437A2)GLM11420
 INCLUDED IN: GLM25120
Bearing
---------------------


(OEM: 31-30895)GLM11420
 INCLUDED IN: GLM25120
Bearing
---------------------


(OEM: 31-30895)GLM11050
Spring
---------------------


(OEM: 24-30893)GLM21131
Cross Pin
---------------------


(OEM: 17-30632)GLM11060
 INCLUDED IN: GLM25125
Clutch
---------------------


(OEM: 52-853594T)GLM11060
 INCLUDED IN: GLM25125
Clutch
---------------------


(OEM: 52-853594T)GLM11155
Prop Shaft
---------------------


(OEM: 44-824110)GLM11013
 INCLUDED IN: GLM11312
Reverse Gear
---------------------


(OEM: 43-828073A1)GLM11013
 INCLUDED IN: GLM11312
Reverse Gear
---------------------


(OEM: 43-828073A1)GLM23140
Thrust Ring
---------------------


(OEM: 68100-1)GLM21620
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Ball Bearing
---------------------


(OEM: 30-88957T)GLM21620
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Ball Bearing
---------------------


(OEM: 30-88957T)GLM21620
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Ball Bearing
---------------------


(OEM: 30-88957T)GLM21620
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Ball Bearing
---------------------


(OEM: 30-88957T)GLM83445
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring
---------------------


(OEM: 25-31534)GLM83445
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring
---------------------


(OEM: 25-31534)GLM83445
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
O-Ring
---------------------


(OEM: 25-31534)GLM11410
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Roller Bearing
---------------------


(OEM: 31-30956)GLM11410
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Roller Bearing
---------------------


(OEM: 31-30956)GLM11410
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Roller Bearing
---------------------


(OEM: 31-30956)GLM11410
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM11312
 INCLUDED IN: GLM25125
Roller Bearing
---------------------


(OEM: 31-30956)GLM11405
Bearing Carrier
---------------------


(OEM: 818763A10)GLM85130
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal (inside)
---------------------


(OEM: 26-14077)GLM85130
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal (inside)
---------------------


(OEM: 26-14077)GLM85130
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal (inside)
---------------------


(OEM: 26-14077)GLM85700
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal (outside)
---------------------


(OEM: 26-12224)GLM85700
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal (outside)
---------------------


(OEM: 26-12224)GLM85700
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal (outside)
---------------------


(OEM: 26-12224)GLM85700
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Oil Seal (outside)
---------------------


(OEM: 26-12224)GLM32800
Washer
---------------------


(OEM: 12-92721)GLM11381
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Keyed Washer
---------------------


(OEM: 14-18323)GLM11381
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Keyed Washer
---------------------


(OEM: 14-18323)GLM11381
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Keyed Washer
---------------------


(OEM: 14-18323)GLM21120
BPI21120
MAL9-72155
Cover Nut
---------------------


(OEM: 79448)GLM21120
BPI21120
MAL9-72155
Cover Nut
---------------------


(OEM: 79448)GLM21120
BPI21120
MAL9-72155
Cover Nut
---------------------


(OEM: 79448)GLM21301
Thrust Hub
---------------------


(OEM: 12-825467)GLM21760
Lockwasher
---------------------


(OEM: 13-42351-1)GLM21360
Tab Washer Receiver
---------------------


(OEM: 12-31211A3)GLM21210
Tab Washer
---------------------

GLM21201
Tab Washer (Long Leg)
---------------------


(OEM: 14-31210)GLM21230
Lock Nut
---------------------


(OEM: 11-827614)GLM11120
Drive Shaft
---------------------


(OEM: 45-42634)GLM21330
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Slinger
---------------------


(OEM: 25-30271)GLM21330
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Slinger
---------------------


(OEM: 25-30271)GLM21330
 INCLUDED IN: GLM87510
 INCLUDED IN: GLM25120
 INCLUDED IN: GLM25125
Slinger
---------------------


(OEM: 25-30271)GLM21490
Washer
---------------------


(OEM: 12-29245)GLM11012
Thrust Spacer
---------------------


(OEM: 23-824108)GLM12702
Anode (not shown)
---------------------


(OEM: 806105A1)GLM11080
Key
---------------------


(OEM: 28-30281)GLM11091
 INCLUDED IN: GLM11312
Foward Gear Set
---------------------

GLM11091
Foward Gear Set
---------------------


(OEM: 43-828072A2)BPI12120
GLM12120
SIE18-3320
Water Pump Kit for Mercruiser MR Alpha One 1984-1991
---------------------


(OEM: 46-96148A8)BPI12120
GLM12120
SIE18-3320
Water Pump Kit for Mercruiser MR Alpha One 1984-1991
---------------------


(OEM: 46-96148A8)BPI12290
GLM12290
SIE18-3217
Impeller Kit Water Pump for Mercruiser
---------------------


(OEM: 47-89984T5)BPI12290
GLM12290
SIE18-3217
Impeller Kit Water Pump for Mercruiser
---------------------


(OEM: 47-89984T5)GLM12754
Anode Kit Aluminum for Mercruiser MR Alpha One 1984-1990
---------------------


(OEM: 888756Q02)BPI87510
GLM87510
SIE18-2652
Seal Kit Lower Unit for Mercruiser #1 R Alpha 1 1990 and Earlier
---------------------


(OEM: 26-33144A2)BPI87510
GLM87510
SIE18-2652
Seal Kit Lower Unit for Mercruiser #1 R Alpha 1 1990 and Earlier
---------------------


(OEM: 26-33144A2)BPI87510
GLM87510
SIE18-2652
Seal Kit Lower Unit for Mercruiser #1 R Alpha 1 1990 and Earlier
---------------------


(OEM: 26-33144A2)

More Kits Available

Complete Gearcase Assembly
Gearcase Rebuild Kit
Gearcase Seal / Bearing & Gear Kit
Lower Unit Housing Kit
Lower Unit Seal & Bearing Kit
Lower Seal Kit
Water Pump Kit

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