OMC electric shift flat rate repair *Parts drawing *Video

T.C. Electronics/Marine (416) 751-7326 Home Page

OMC electric shift gear-head rebuild (how to series)

OMC Stringer sterndrive lower gearcase step by step rebuild
electric shift gear-head assembly

  • Gear-head rebuild help for 8 or 10 bolt swivel housings
  • Prop shaft bearing retainer (gear-head) years 1967-1971
  • Swivel housing does not need to be separated from gearcase for this repair
  • Two oil seals and bearing will be removed
  • Three oil seal and one bearing will be installed
  • Electric shift step by step pictures of outdrive rebuild
  • How to series for Electric shift outdrive forward or reverse coil repairs.
  • Clutch spring and swivel housing rebuilt

381849 Used gear head assembly OEM 381849

381849 Used gear head assembly OEM 381849

By author Trish Dougherty

680 Loctite is used on this bearing retainer (gear-head-assembly) to install 3 seals when rebuilding 1971 to 1977 OMC stern drive.

OMC outdrive showing sand blasted gear-head area
OMC outdrive showing sand blasted gear-head area

Sandblast or wire brush lower unit outdrive area, so not particles fall into stern-drive when we pull gear-head assembly out.

A Clean out screw hole with 13/64 drill
A Clean out screw hole with 13/64 drill

Clean out screw hole with 13/64 drill.

B Drill out 5/8 inch deep
B Drill out 5/8 inch deep

Drill out 5/8 inch deep.

C Tap size is 1/4 inch 20 n.c
C Tap size is 1/4 inch 20 n.c

Tap size is 1/4 inch 20 national coarse thread.

D Re-tap about 1/2 inch deep
D Re-tap about 1/2 inch deep

Re-tap about 1/2 inch deep.

E 7/16 wrench required
E 7/16 wrench required

7/16 wrench required.

F Only 2 bolt holes required
F Only 2 bolt holes required

Only 2 bolt holes required.

G
G

Remove the 4 screws from gear head assembly.

H
H

Remove old o rings.

I Install new o rings from seal kit P/N 87620
I Install new o rings from seal kit P/N 87620

Install new o rings P/N 87620.

J Remove gear-head with bearing carrier puller
J Remove gear-head with bearing carrier puller

Remove gear-head with bearing carrier puller.

K Can allso just pry out just holding screw
K Can allso just pry out just holding screw

Can allso just pry out just holding screw.

L Remove by hand after 3/8 of an inch
L Remove by hand after 3/8 of an inch

Remove by hand after 3/8 of an inch.

M
M

Can now remove screws.

N Notice groove on water seal area of drive shaft

Notice groove on water area of drive shaft and groove on oil seal area of the lower part of drive shaft

 

Notice groove on oil seal area the lower part of drive shaft .

Wire brush bearing retainer
Wire brush bearing retainer

Remove o-ring and clean old gasket compound from unit with fine wire brush

Machine new oil seal area to 1.500 inches
Machine new oil seal area to 1.500 inches

Lathe will be required to machine front face to hold extra oil seal. Machine new oil seal area to 1-1/2 inch, you can be over by up to .007 if using 680 and .003 with 609 green Loctite retaining compound. Note Loctite products are listed under tools if you need to purchase this item.

Remove old bearing and seals
Remove old bearing

Remove old seals and bearings by pushing on bearing. Then sandblast or wire brush old gasket compound off gear-head assembly. Note Johnson gasket retaining compound is listed under tool if required.

Clean bearing and seals of any 680 loctite
Clean bearing and seals of any 680 loctite
 

Machine new oil seal area to 1.500 inches
Machine new oil seal area to 1.500 inches

By author Trish Dougherty

Lathe will be required to machine front face to hold extra oil seal. Machine new oil seal area to 1-1/2 inch, you can be over by up to .007 if using 680 and .003 with 609 green Loctite retaining compound. Note Loctite products are listed under tools if you need to purchase this item.

Remove old bearing and seals
Remove old bearing and seals

Remove old seals and bearings by pushing on bearing. Then sandblast or wire brush old gasket compound off gear-head assembly. Note Johnson gasket retaining compound is listed under tool if required.

Push bearing all the way thru to remove parts
Push bearing all the way thru to remove parts

Push bearing all the way to to remove oil seals and bearing parts

Press-half-way-if-not-replacing-bearing
Push bearing all the way thru to remove parts

Press only half way if you are not replacing with new bearing.

Coat 3 oil seals with 680 loctite
Coat 3 oil seals with 680 loctite

Loctite must be applied to outside on three seals.

Cover inside bearing and seal area with 680 loctite
Cover inside bearing and seal area with 680 loctite

680 Loctite must be applied to inside of retainer

Install new bearing with the number up
Install new bearing with the number up

Now you can install bearing 1st and seals after.

Will require one 22860 bearing OEM 379504
Will require one 22860 bearing OEM 379504

Will require one P/N 22860 bearing OEM 379504

Install first seal spring area down
Install first seal spring area down

Cover bearing, seals and o-ring area before painting with zinc chromate primer. Place 2 or 3 coats of clear lacquer over that to stop corrosion.

Install till flat
Install till flat

Install till flat

Install second oil seal with spring area up
Install second oil seal with spring area up

Install second oil seal with spring area up

Two seals installed here
Two seals installed here

Two seals installed here

Line up and install third oil seal
Line up and install third oil seal

Line up and install third oil seal and wipe off excess 680 Loctite compound

Insert oil seal till flat on top
Insert oil seal till flat on top

Insert 3rd oil seal till flat on top.

 

Clean bearing and seals of any 680 Loctite. This is a used electric shift with rebuilt gear-head

Used electric shift with rebuilt gear head
Used electric shift with rebuilt gear head

Used electric shift with rebuilt gear head

Used electric shift with rebuilt gear head
Used electric shift with rebuilt gear head

P/N U-22-540 Used gear head assembly OEM 381849 with 3 seals in propeller shaft area. Bearing retainer has three seals located in different areas. This is so any groves that may be on the old prop shaft will not come in contact with the newly placed seals. Gear head assembly has zinc chromate primer with clear coat paint. $179.09

Shaft view electric shift 1971-1977
Shaft view electric shift 1971-1977

OMC sterndrive shaft view for electric shift years 1971-1977

Used electric shift with rebuilt gear head

Used electric shift with rebuilt gear head

This is a standard rebuilt used electric shift sterndrive from T.C.Electronics/Marine