120 hp vs 3.0 outdrive

jimg984

Chief Petty Officer
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Jul 16, 2007
Messages
403
friend has 1985 cris craft with a 3.0 mercruise outdrive with no engine when he got it....we are looking at a120 hp engine and not sure it will connect to outdrive.... need info bad,,, ths
 

Bondo

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Staff member
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Apr 17, 2002
Messages
70,468
Re: 120 hp vs 3.0 outdrive

Ayuh,... The 140hp,3.0l, 'n the 2.5l 120hp motors both have the same bolt holes in the same places, in the same sizes...

Easy swap....
 

jimg984

Chief Petty Officer
Joined
Jul 16, 2007
Messages
403
Re: 120 hp vs 3.0 outdrive

ty for your quick and simple reply... will the splines from the 3.0 outdrive match up with clutch splines on the 120, because he doent have the fly housing that was with the 3.0 outdrive.......pervious owner of the 3.0 let that go with engine ty
 

Silly Seville

Senior Chief Petty Officer
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Dec 5, 2009
Messages
798
Re: 120 hp vs 3.0 outdrive

will the splines from the 3.0 outdrive match up with clutch splines on the 120

Yes, the Alpha 1 input shaft splines will match the splines of the coupler of either the 120 or 140 engines.
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Re: 120 hp vs 3.0 outdrive

The only difference between a drive for a '120' and the drive for the '3.0' is the label on the back. EVERYTHING ELSE is the same, including the yoke splines, and the ratio.
 

Fishermark

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Oct 19, 2003
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5,617
Re: 120 hp vs 3.0 outdrive

I know you didn't ask... but just be aware that you will notice a big difference in performance. My father had an 18' Sportcraft which performed well with the 3 liter it came with. When that engine died, he replaced it with a 120. The difference was amazing - in a BAD way. If your main goal is simply to get from point A to point B, then yes, the swap will work. Just don't expect much in the way of performance.
 

jimg984

Chief Petty Officer
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Jul 16, 2007
Messages
403
Re: 120 hp vs 3.0 outdrive

ths for all the replies,,,, i welcome all input,,,,,easier to type than work, even with my bad spelling
 
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