B&M 77105 STARTER, GM, 168T RING GEAR, STAGGERED MOUNT - Manual (Page 4)

4
Table 1:
Trouble Shooting Information:
Pinion Gear Engagement: While
setting the face distance between
the pinion and the ring gear (see
Step
5) should yield proper
engagement, a final check should
be performed. After cranking the
engine multiple times, you should be
able to inspect the witness pattern
on the pinion gear to check for
proper
engagement. The gear
should show wear from the outer
face to between 1/4” & 3/8” back
towards the body of the starter.
Excessive Noise: If there is a high
pitched whine during cranking, the
pinion to ring gear mesh may be too
great. If there is a whine after
cranking there may be too little
clearance. Please see Step 6,
Figure 4 and Figure 5 for setting the
mesh, or center to center distance.
Slow Cranking: Generally this can
be attributed to low voltage at the
starter. The battery should be
checked, as well as wire size,
terminals, and switches. Keep in
mind any switches (such as
master kill switches used in race
cars)
must have very high
amperage ratings, between 400 to
700 amps.
R-Terminal: On older vehicles with
point type ignition systems, there
was an extra terminal and wire on
the original starter. This fed 12V
during cranking directly to the
ignition coil when cranking, serving
as a ballast resistor by-pass. The
B&M StarTek starter does not have
this terminal, as most modern
ignition systems do not require it. If
it is found that your ignition system
has low or no voltage during
cranking, connect a 10A/250V
diode in-line with the starter motor
connection to the positive on the
coil. The banded end of the diode
goes away from the starter. This
acts as a check valve, allowing
current to travel from the starter to
the coil during cranking, and not
allowing current to feed back to the
starter while the engine is running.
Cast Iron Starters: The B&M
StarTek Starter is intended to
replace OEM starters that were
equipped with an aluminum front
housing, or nose. If your original
starter was cast iron, more shims
may be required to obtain proper
ring gear engagement.
Starter Cable Length vs. Gage
Length 3’ 5’ 7’ 10’ 10+’
AWG 4 2 1 0 00
Tools List
Jack & Jack Stands
Work Light
Torque Wrench
5mm Allen
9/16” Socket + Ratchet
Flat Blade Screwdriver
1/2” Wrench
Tin Snips for cutting shims, (if
required)
Parts List
(1) B&M StarTek Starter
(2) Mounting Bolts
(2) Mounting Block Shims
(1) Shim Ring
(1) Outer Shim
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through Friday, and 7:30AM to 5:00 PM Saturday, PST.
Customer Assistance Helpline
Phone: 707-544-4761