115Hp Johnson, Can I put Bigger Carbs on?

[Heatman]

My son has A 79 115HP v-4 Johnson and I have A 84 85HP Johnson. (I guess his Johnson is bigger than mine!!) We wanted to know if he can put 140 carbs on his 115HP to give him more HP, and If so can I put his carbs on my 85HP? Next, Where can we get 140 carbs?<br /><br /> Thanks<br /> Paul

 

[ajp]

Re: 115Hp Johnson, Can I put Bigger Carbs on?

The carbs are probably the same, but HP is more from bore and stroke. The carbs just supply the necessary amount of gas. The 115hp is plenty of HP and uses plenty of gas as it is. If you want it to go faster, get a smaller boat.

 

[ledgefinder]

Re: 115Hp Johnson, Can I put Bigger Carbs on?

The 115 & 140 both have 1 & 5/16 carbs, I think. Not sure about the 85 (no 1984 85hp - do you mean 1974?). 140 has hotter porting & a somewhat tuned exhaust. All three are 93-99 cubic inch displacement.