Omc motor swap 2.5 to 3.0

vocky44

Recruit
Joined
Apr 9, 2018
Messages
1
I have an 88 bayliner with an omc 3.0 engine and long story short it got water in the Oil and am replacing it. I found a 86 omc 2.5 engine.

My question is will It be a straight swap just bolt up and go or do i need a conversion kit or should I not even bother. Both have omc outdrives.

Thank you in advance.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
50,356
unbolt one, bolt in the other, align as required

you will be down about 25hp going from a 3.0 to a 2.5
 

Bondo

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Apr 17, 2002
Messages
71,118
Ayuh,.... Plug, & Play,..... Externally they are the same, except the 2.5l doesn't use a harmonic balancer,.....
 
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