mercruiser120 to mercruiser165 repower

[dade61782]

i have a 1976 glasstron with a 120 mercruiser i want more power can i use my 120 outdrive with a 165 motor

 

[whywhyzed]

Re: mercruiser120 to mercruiser165 repower

short answer, no...it's got a different gear ratio than the 6 cyl compatible o/d.
But, if you swap the drive to 6 cyl ratio, it's probably one of the easiest engine conversions one could do in a boat....
A 3.0 140HP would be the easiest and would work with current drive, just require prop pitch adjustment....

 

[Alumarine]

Re: mercruiser120 to mercruiser165 repower

The 165 might be too long and probably requires a different front motor mount location.