1991 25 hp Johnson

[haz]

I'm going to look at a 91 25hp Johnson w/ controls next week. I was hoping you nice folks might have some opinions on this motor. Sorry I don't have a lot of details at this point. Are all of these motors the same i.e.; are they all twins, with oil injection? (I'm guessing/hoping it's got oil inj.) When I go to look at this motor is there anything I should be specifically looking at. Should compression be around 120?<br /><br />Any advice would be appreciated.<br /><br />thanks<br /><br />haz

 

[JB]

Re: 1991 25 hp Johnson

Howdy Haz.<br /><br />I don't think the 25s had VRO. Don't remember if the three cylinder 25s were available in '91, so it is probably a twin, and a great one.<br /><br />Compression should be over 90psi and within 10% of each other. Hot, blue or white spark to all plugs.<br /><br />Lower unit oil should be dark, not milky, and have no water in it.<br /><br />Good luck. That was a great engine in '91 and if it has been cared for well it should still be one.

 

[haz]

Re: 1991 25 hp Johnson

Is this the largest hp available for that particular block size? for example I believe the 9.9hp and 15hp OMC's are common blocks. I'm just thinking for the same weight I'd rather go with the larger hp.<br /><br />haz

 

[rickdb1boat]

Re: 1991 25 hp Johnson

haz <br /> Look and see if it has an oil tank to verify it has no oil injection(Doubt it on that small of a motor). It is a twin cylinder. A weight example is is 117 for a rope start and 120 with electric start for a 91' 25 HP. A rope start 15 HP of the same year weighs 77 pounds. 80 For an electric..<br /><br />BTW-Excellent Motors and reliable