Mercruiser Outdrive Parts Drawings *How to Videos

T.C. Electronics/Marine Home Page

Mercruiser Anodes - Sterndrive Trim Tabs

Stern drive - Bell Housing - Transom Anodes and Kits

12670 Trim Tab Mercruiser 31640Q4

12670 Trim Tab Mercruiser 31640Q4

Aluminum trim tab can be used for salt water, brackish and fresh water. Installed onto the lower unit on Mercruiser and Alpha models made between 1970 - 1990. Does not work with the Alpha 1 Gen 2 (1991 and up).

This tab will prevent corrosion of the aluminum drive housing, and will also offset the pull of the boat to one side due to the propeller rotation.

This part can be rotated before full tightening the screw - if the boat is pulling too much to the side after installation, loosen screw and rotate this part more to help compensate for the pull. GLM 12670 or OEM 31640-4 $10.00

12671 magnesium fresh water 31640T6

12671 Magnesium fresh water 31640T6

Made of magnesium, this part will only work properly to prevent outdrive corrosion in fresh water. Will not work in salt or brackish water. Compatible with all 1970 - 1990 models except Gen 2 Alpha models. Fin length is approximately 2-3/8" from base to fin tip. GLM 12671 or OEM 31640T6 $21.00

21740 Screw 10-32470

21740 Screw 10-32470

Replacement screw to secure tab into lower gear housing. Can be used for part 12670 aluminum, or 12671 magnesium. 2 screws included in package. GLM 21740 or OEM 10-32470 $4.00

12710 Lower Unit 76214Q5

12710 Lower Unit 76214Q5

This part is used on the Alpha 1 Generation 2 (1991 and up) models, and does not have a fin. Use screw 21741. GLM 12710 or OEM 31640Q4 $15.00

12754 Anode Kit 888756Q02

12754 Anode Kit 888756Q02

Complete anode kit for the MR / Alpha 1 models (1984 - 1990, serial numbers 6854393-OD469858) - includes part 12670 for the outdrive,12700 and 12713 for the transom, 12703 (includes screws) for the trim cylinders. GLM 12754 or OEM 888756Q02 $35.00

12722 Alpha 1 Gen 2 Aluminum 888756Q01

12722 Alpha 1 Gen 2 Aluminum 888756Q01

Complete set for the Alpha 1 Generation 2 models (1991 and up, serial numbers OD469859 and up). Includes part 12710, 12702 for the bearing carrier, 12703 for trim cylinders and 12711 for the upper gear housing. Includes bolts. GLM 12722 or OEM 888756Q01 $36.00

12713 Transom Mount 821631Q1

12713 Transom Mount 821631Q1

Mounts on the transom assembly. 2 required. Includes gasket and rubber insert. Price is per unit. GLM 12713 or OEM 821631Q1 $18.00 each

12700

12700

Installed onto transom housing, 2 included. Compatible with 1984-1990 outdrives. GLM 12700 or Mercury 55989Q9 $10.00