GLM Products Inc - Upper Gear Sets
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GLM is proud to introduce our Upper Gear Sets for OMC Stringer!

All GLM upper gear sets come with:
GLM #21544 (OEM #382212) Bearing
GLM #21545 (OEM #379585) Bearing
GLM #21547 (OEM #375761) Bearing

GLM is the first in the industry to have all of the OMC Stringer upper housing gear ratios!

Different size engines require different gear ratios in the drive. The manufacturer changes
these ratios with different gear sets. The gear ratio change is in the upper gear housing*.
Below is a chart showing the tooth count for the different size engines used with OMC
Stringer sterndrives.

Engine
# of Teeth on Original Gears
GLM #
All 4-Cylinder Engines
21T/18T
22518 OEM #982244
3.8 Liter 229 Cubic Inch V6
21T/20T
22530 OEM #982835
165HP Inline 6-Cylinder
21T/19T
22514 OEM #984262
4.3 LIter 262 Cubic Inch V6
21T/19T
22514 OEM #984262
5.0L/302 Ford V8
21T/17T
22512 OEM #982259
5.0L/305 Chev. V8
21T/17T
22512 OEM #982259
5.7L/350 Chev. V8
21T/16T
22510 OEM #982261
5.8/351 Ford V8
21T/16T
22510 OEM #982261

*All lower gear housing ratios are either 2.0:1 for the four-cylinder engines or 1.83:1 for the six
and eight-cylinder engines.

Click Here to Download GLM's Upper Gear Sets Flyer.
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