Page 42 - OMC_Catalog_Flipbook

Cobra

LOWER GEAR HOUSING GEARS

HEAVY DUTY

Gear Set GLM #22666

Includes #21651 thrust washer**

When all three gears need replacing in your OMC Cobra Sterndrive the installation of the GLM
#22666 heavy-duty gear set is highly recommended. The heavy-duty gears can be used with
all four-cylinder sterndrives* from 1990-1993 and all V6 and V8 OMC Cobra sterndrives from
1986-1993. It is recommended that a new clutch GLM #22625 (this clutch is not included with
the gear set) be installed with the heavy-duty gears. The gears can be used with the standard
1-3/16" diameter prop shaft (1986-1990) or the heavy-duty 1-1/4” diameter prop shaft (1991-
1993).

GLM #22666 heavy-duty gears fit these STRONGER
OMC Cobra Sterndrive units: OEM gear sets are machined from
8620 forged steel. The GLM gear set is
machined from a higher alloy forged
3.0L/181CI 4-Cyl. Chev. 1990-93 steel. The stronger teeth and higher
4.3L/262CI V6 Chev. 1986-93 alloy steel results in a gear that is 50%
stronger than any other comparable
5.0L/302CI V8 Ford 1986-93 gear set. These durable gears are
5.0L/305CI V8 Chev. 1986-93 capable of operating with up to 300
horsepower.
5.7L/350CI V8 Chev. 1986-93
5.8L/351CI V8 Ford 1986-93 MORE DURABLE
The new GLM gear set has fewer,
larger, and stronger teeth. The pinion
gear has 12 teeth and the forward and
reverse gears have 22 teeth. The
IMPORTANT NOTE: original OEM gear set has 14 teeth on
the pinion and 26 teeth on the forward
and reverse gears.
The new heavy-duty GLM #22666 gears
will not interchange with the standard QUIETER
Cobra gears. For individual Cobra gear During the gear machining process,
replacement, you must use the standard an additional pass is made over each
tooth for a finer surface. This makes
duty GLM #22623 pinion and forward the gear operation especially quiet.
gears or the GLM #22624 reverse gear.

*Except 1990 2.3L
**For model year 1991 OMC increased the prop shaft diameter at the carrier needle bearing (not the prop splines) from 1-3/16 to 1-1/4 inches.
Some older gearcases may be fitted with the new large diameter prop shaft. The large diameter prop shaft utilizes a thrust washer (included
with this gear set) between the prop shaft and reverse gear. Discard the thrust washer when using the small diameter prop shaft.

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