B&M 77105 STARTER, GM, 168T RING GEAR, STAGGERED MOUNT - Manual (Page 2)

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position. To re-clock the starter,
remove the three M6 x 1 mounting
bolts between the starter and the
mounting block and re-position
accordingly. Re-Torque to 8 ft-lbs.
Please see Figure 1.
STEP 5. With the starter installed
and clocked at the best position,
check clearance between the faces
of the ring gear and pinion gear.
There should be at least 1/16”
(.0625”, 1.6mm) space between
gear faces. Please see Figure 2.
If there is not enough clearance,
you will need to install the included
shim
kit. Remove the starter
assembly from the engine and
remove the mounting block. Install
the shim ring into the bearing bore,
place the outer shim on the starter
body, then re-assemble. This will
move the starter and pinion away
from the ring gear by approximately
1/16”. Please see Figure 3.
STEP 6. With the proper pinion to
ring gear face distance and the
starter assembly in place, the next
step is to check “mesh” or center to
center distance of the pinion and
ring gear. MAKE SURE THE
BATTERY
CABLES ARE
DISCONNECTED. Pull then gently
pry out the pinion to engage the ring
gear. Insert a wire gage as shown in
Figure 4. There should be .020” -
.035” clearance between the outer
part of the ring gear tooth and the
valley of the pinion. A standard 1.25”
paper clip (wire size ~.035”) has
been used as a gage.
If there is too little clearance:
Install one of the supplied mounting
flange shims and check again. The
mounting flange shim will move the
starter out by approximately 1/64”
(.016”). Please see Figure 5.
If there is too much clearance:
Trim one of the mounting flange
shims (see Figure 5) and install
under at the outer bolt only. Check
clearance again.
STEP 7. Connect the solenoid
switch wire. With the amperage
being considerable (~30A) to pull
the bendix, B&M recommends 12
Ga. wire as a minimum. Note: If
your original starter had a second
terminal, or “R” terminal, this can
generally be omitted. Please see
trouble shooting information at the
end of this procedure for further
information.
STEP 8. Connect the main cable to
the starter. Due to the high amperage required to turn the
starter motor, it is important to size
the wire in accordance to its length.
Keep in mind to size all ground
wires accordingly also, these are
carrying equal current. Please see
Table 1 for cable length versus gage
recommendations.
Figure 2: Pinion to Ring Gear Face Distance
Figure 3: Face Distance Shims