Mercruiser Outdrive Parts Drawings *How to Videos

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Mercruiser lower unit drawing *Outdrive parts 25-43

Lower gear-case outdrive drawing parts 25 - 43

  • Breakdown drawing of lower unit including trim tab, drain screw and insert screens
  • Photos and Mercury / Mercruiser OEM part numbers listed beside each GLM part number

Mercruiser parts 25-57

Mercruiser parts 25-57

12120 1984-1990 kit

12120 1984-1990 kit

1A
P/N 17100
GLM Marine aftermarket lower unit years 1972 to 1990 with 2 year limited warranty. No core deposit required. $795.95

87510 Seal kit OEM 26-33144A2

87510 Seal kit OEM 26-33144A2

B
# 87510 Seal and gasket kit $42.00

30010 gasket

30010 gasket

Item 25
P/N 30010
Shift shaft gasket washer (5 units) OEM 12-31266 $4.29

 

Item 26
P/N 85581
Oil Seal *Included in P/N 87510 parts*

21010 bushing assembly

21010 bushing assembly

Item 27
P/N 21010
Bushing assembly *Included in P/N 87510 seal kit

81180 o-ring shifter

81180 o-ring shifter

Item 28
P/N 81180
O-Ring *Included in P/N 87510 parts

32790 washers

32790 washers

Item 29
P/N 32790
Washer *10 units OEM 12-27880 $4.09

21132 clip

21132 clip

Item 30
P/N 21132
Clip OEM 18-20233

21030 lower shift shaft

21030 lower shift shaft

Item 31
P/N 21030
Shift shaft OEM 77481-1 $25.09

85140 Oil passage seal

85140 Oil passage seal

Items 32
P/N 85140
Seal OEM 26-45577-1 Included in P/N 87510 parts

Lower unit oil pump

Lower unit oil pump

Items 33A
P/N 401-11245-1 Mercruiser lower unit oil pump $9.15

401-11245-1

21731 Draining set

21731 Draining set

Item 33B
P/N 21731
Oil plug magnetic drain screw OEM 22-67892A1 $5.09

31170 Gasket for housing drain

31170 Gasket for housing drain

Item 34
P/N 31170
Washer Included in seal kit P/N 87510

21870 insert screen

21870 insert screen

Item 35
P/N 21870
Insert screen (stbd) OEM 93423-1 $4.09

21880 insert screen

21880 insert screen

Item 36
P/N 21880 Insert screen port side OEM 93424-1 $4.09

12822

12822

Item 37
P/N 12822 Screw *5 units OEM 10-76156 $5.09

21161 stainless steel lock nut

21161 stainless steel lock nut

Item 38
P/N 21161 Stainless steel lock nut OEM 11-45812 $4.09

21170 lock nuts 5 units

21170 Lock nuts 5 units

Item 39
P/N 21170 Lock nuts *5 units OEM 11-13439-1 $9.09

21740

21740

Item 40
P/N 21740 trim tab screw *2 units OEM 10-32470 $4.09

22430 Allen bolt

22430 Allen bolt

Item 41
P/N 22430 Bolt OEM 10-30206 $4.09

12670 Anode

12670 Anode

Item 42
P/N 12670 Trim tab
anode OEM 31640A1 $9.09

21600 bearing

21600 bearing

Item 43A
P/N 18-1150 Drive shaft OEM 31-92366A1 MC-1 / R serial 4893835 - 62255757 $75.29

21610 Drive shaft pinion gear bearing
21610 Drive shaft pinion gear bearing
Item 43B
P/N 21610 Drive shaft pinion bearing OEM 31-42647A1 MR / Alpha 1 serial 6225577 and up $43.15