25hp OMC's

[fillndablank]

I am looking at repowering an aluminum boat that I recenty acquired. It had no motor, and the max hp is 25 per the plate.

I want to get an OMC because that is what I have used in the past. I don't mind having something older, as I am mechanically capable and have no problem reading a manual.

So....before I start looking are their pros/cons to the 70's thru the early 90's motors? i.e thru hub exhaust.....different ignitions........

 

[BoatBuoy]

Re: 25hp OMC's

The 1977 and later 25's had CDI ignition, but it wasn't until the mid 80's before they had thru-hub exhaust.

 

[OBJ]

Re: 25hp OMC's

I would try and get as new as the pocket book would allow. What ever you look at, do take the time and have a trusted wrench check it out for you or if you know what to do to check the engine out, do it yourself.

 

[jimmbo]

Re: 25hp OMC's

The 25 hp during most of the 70s was a tiny 22 cu. in model. It wasn't until 1978 or 79 that the displacement was increased to the same as the 35hp.