need more power out of evinrude 75

[hawk232]

mine is an '82 model. right now my 17' boat tops out at about 35, i would like to see above 40, ideally around 45. is there anything that i can do to the motor to make some additional power?

 

[WillyBWright]

Re: need more power out of evinrude 75

Nope. 75 is the most horsepower offered in a Johnnyrude triple. You're not going to see a 10mph gain without substantially more cubic inches. Mid 30s is about all you can expect out of a triple on a conventional boat. If you want 45+ out of your 75, you need to hang it on a racing hull.

 

[kenmyfam]

Re: need more power out of evinrude 75

I get mid 40,s with a 140hp V4 Johnson on a similar sized boat. My friend gets about the same as you with his 75hp on a similar sized boat although he has a Yamaha

 

[NealLauderman]

Re: need more power out of evinrude 75

how bout on a bass boat? Would that make it go any better than the deep v-hulls?

 

[mikesea]

Re: need more power out of evinrude 75

you would get more with the bass hull

 

[Dhadley]

Re: need more power out of evinrude 75

Neal, since we can't see your rig let's start with the basics. What prop do you have? Brand, style, pitch and diameter. What's the top (accurate) rpm? Accurate top speed? We'll figure the slip % and go from there.

You may be able to increase the efficiency some but gaining 10 mph is a real stretch.

 

[Chinewalker]

Re: need more power out of evinrude 75

I get about 40-41 out of my 1980 Johnson 75 on a lightweight 15-foot V-hull. That's about as good as you're going to get with a stock motor on a decent hull.

If you need more speed than that, get a bigger motor...

- Scott

 

[tashasdaddy]

Re: need more power out of evinrude 75

i get 45 out of this, but the hulls is only 850 lbs, 88 88spl
http://i46.photobucket.com/albums/f119/tashasdaddy/MVC-845S-1.jpg

 

[steelespike]

Re: need more power out of evinrude 75

Is your speed on GPS?
You may get a couple of MPH by fine tuning your set up.
Raise the motor verticly, be sure your prop is in excellent condition.
As stated give us the info requested and the guys may be able to get you set up with the best prop selection.
Your not likely to see 40 unless your setup is terrible now.