Page 74 - OMC_Catalog_Flipbook

Stringer

COMPLETE UPPER AND LOWER GEAR HOUSING ASSEMBLY

APPLICATION CHART 1973-1985

Upper Upper Lower Lower
Model Year
Complete Housing Complete Housing
4-Cylinder, All 1973-1977 27500 27000 - -
4-Cylinder, All 1978-1985 27500 27000 28830# -
L6, 165 HP, 250 CID 1973-1977 27300 27000 - -

V6 Chevy, 3.8L, 229 CID 1981-1985 27400 27000 28830 28600
V6 Chevy, 4.3L, 262 CID 1985 27300 27000 28830 28600

V8 Chevy, 5.0L, 307 CID 1973-1977 27200 27000 - -
V8 Chevy, 5.0L, 305 CID 1978-1985 27200 27000 28830* 28600^

V8 Ford, 5.0L, 302 CID 1974-1977 27200 27000 - -
V8 Chevy, 5.7L, 350 CID 1978-1985 27100 27000 28830* 28600^

V8 Ford, 5.8L, 351 CID 1975-1977 27100 27000 - -
V8 Ford, 5.8L, 351 CID 1978-1979 27100 27000 28830* 28600^

*The GLM #28830 complete lower gear housing is a direct replacement for the 1981-1985 OMC
lower gear housing. The installation of the 1981-1985 ESA (Electronic Shift Assist) components and
shift cable are necessary to replace the lower gear housing on the 1978-1980 OMC sterndrives with
hydraulic shift.

#The GLM #28830 complete V6/V8 lower gear housing (large diameter) can be used to replace the
1978-1985 four-cylinder lower gear housing (small diameter) if the upper housing gear ratio is
changed to 21:20. The installation of the 1981-1985 ESA (Electronic Shift Assist) components and
shift cable are necessary to replace the lower gear housing on the 1978-1980 OMC sterndrives with
hydraulic shift.

^The GLM #28600 lower housing will not replace the 1978-1980 OMC lower housings with hydraulic
shift.

74