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OMC stern drive gear set chart 1973 to 1986

OMC Model Number and year with GLM aftermarket
gear set numbers for year 1977 to 1986

Model Number
Year
Pinion forward gear set
Reverse gear
Clutch dog
100 to 165
1973
     
120 to 190
1974-1975
     
120* to 225 *
1976
     
120 to 190
1976
     
120 / 140
1977
     
120 / 140
1978-1981
   
22633
*165 to 235*
1976
     
*175 to 235*
1977
     
175 / 190 / 235
1977
     
185
1978
22621
22612
22625
185
1980-1981
22621
22612
22625
200
1979
22612
22612
22625
200
1980-1981
22612
22612
22625
225 / 245
1973-1975
     
225
1978
22621
22612
22625
230
1979
22621
22612
22625
230
1980-1981
22621
22612
22625
235
1975
     
235
1976-1977
     
240
1978
22621
22612
22625
245
1975
     
250
1979
22621
22612
22625
260
1979
22621
22612
22625
260
1980-1981
22621
22612
22625
2.5 liter
1982-1986
22631
22632
22633
3 liter
1982-1986
22631
22632
22633
3.8 liter
1982-1986
22623
22624
22625
4.3 liter
1985-1986
22623
22624
22625
5.0/5.7 liter
1982-1983
22623
22624
22625
5.0/5.7 liter
1984-1986
22623
22624
22625