78 johnson 25 upgrade

[bailz2002]

I have an old 78 johnson 25hp on a 15 ft bomber marathon. Its a pretty heavy boat for the motor but local lake restrictions is why i have it. Was wondering is there anyway to upgrade it from like a 35 or anything to get more power out of it. I know you can do like 9.9 to 15 was just wondering my options. Also prop is non through exhaust and not getting enough RPMs prop choices are limited could that be fixed? conversion? thanks for your help.
got a super deal on motor is why i bought it

 

[jasper60103]

Re: 78 johnson 25 upgrade

I asked a similar question a while back. Something can be done, but it may not be practical. Maybe a lighter boat is the way to go?

http://forums.iboats.com/showthread.php?t=283482

 

[bailz2002]

Re: 78 johnson 25 upgrade

thanks for the link it helped alot !!

 

[tashasdaddy]

Re: 78 johnson 25 upgrade

the cost out weighs any benefits, better of trading boats or motors or both. get a nice tinny and enjoy yourself. the 25 would be great.