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How to *OMC electric shift clutch spring repair

OMC stern drive lower gearcase forward gear clutch spring assembly with step by step removal guide and pictures

  • Stern drive repair help for all electric shift hub assemblies
  • Outdrive years 1967-1977
  • Parts in picture are: reverse and forward gear, hubs, spring, spacer and bearing-pins
  • Snap ring pliers will be required to remove and inspect clutch springs and sleeve. They are listed in index under OMC tool.
  • Electric shift step by step pictures of all hub parts

By author Trish Dougherty

Electric shift repairs require 8 or 10 bolt housings be removed
Electric shift repairs require 8 or 10 bolt swivel housings be removed

Electric shift repairs requires the 8 or 10 bolt swivel housing be removed 1st before removing the lower prop shaft bearing retainer.

313455 USED
313455 USED

Forward / Reverse replacement clutch $199.15 after trade in. Price of spring is $299.15 which includes a $100 spring core deposit, which is refunded after original spring is returned for spring core refund.

A Reverse gear hub assembly
A Reverse gear hub assembly

Reverse gear hub assembly

AB
AB

Snap ring

pliers
pliers

Snap ring pliers required to check clutch spring

B Remove snap ring
B Remove snap ring

Remove snap ring

C
C

Slide reverse gear up

D
D

Reverse gear clutch spring and sleeve

E
E

Remove and save pins

F Note pin count is 40 units
F Note pin count is 40 units

Note pin count is 40 units

G Slide sleeve off gear and spring
G Slide sleeve off gear and spring

Slide sleeve off gear and spring

H Note the wider area in sleeve at top
H Note the wider area in sleeve at top

Note the wider area in sleeve at top

 Will only fit over spring one way note this sleeve is in very good shape
Will only fit over spring one way note this sleeve is in very good shape

Will only fit over spring one way note this sleeve is in very good shape

J sleeve before removed
J sleeve before removed

Sleeve before the clutch spring is removed

K Check to see if spring is broken in half
K Check to see if spring is broken in half

Check to see if spring is broken in half

L Spring breaks in half about one out of ten time
L Spring breaks in half about one out of ten time

Spring will breaks in half about one out of ten time in forward gear failures. This is due to high RPM engagement from idle speeds that are to high, bad wire connection and or a micro switch in shifter controls not functioning proper.

M 90 Present of the time spring breaks on the end tab
M 90 Present of the time spring breaks on the end tab

90 Present of the time spring breaks on the end tab

N Check tab and spacer
N Check tab and spacer

Check tab and spacer

O
O

See if the clutch coil will pull out of allen set screws

P
P

Check for wear spots

Q This unit shows no wear
Q This unit shows no wear

This unit shows no wear

R 3-32 allen wrench will be required if spring is broken
R 3-32 allen wrench will be required if spring is broken

3/32 of an inch allen wrench will be required to remove the spring if broken.

S Can take up to 120 inch pounds to remove screws
S Can take up to 120 inch pounds to remove screws

Can take up to 120 inch pounds to remove screws

T
T

Make sure new allen key is used per clutch spring coil. That's every 5 or 6 screws when removing forward springs.

U Note spacer layout on hub
U Note spacer layout on hub

Note spacer layout on hub

V
V

Spring end tab view this is the area that the spring breaks in the most.

W Broken spring end can be seen with out taking unit apart
W Broken spring end can be seen with out taking unit apart

Broken spring end can be seen with out taking unit apart

Y
Y

Use allen wrench socket when installing spring, will need socket set wrench torque valve of 30-35 inch pounds.

X Take note of thin end of spacer when putting unit back together
X Take note of thin end of spacer when putting unit back together

Take note of thin end of spacer when putting unit back together.

ZA
ZA

Spacer and gear

ZB
ZB

Left side of picture is a forward gear hub. Note no bearing needles

ZC Right side
ZC Right side

Right side shows reverse gear hub with 40 bearing needles. Use wheel bearing grease to hold in position when reinstalling reverse gear bearing assembly.

Loctite 248
Loctite 248

Loctite 248 used on allen screws take compound about 4 hours to set.