93 20hp to 30hp?

[ThePartsMan]

I am looking at buying a 1993 Johnson 20hp but I'm not sure if it will be enough power.

Can the 25,30 or 35 hp carbs and intakes be put on to gain some power?

They are listed in the 20hp manual.

 

[noelm]

Re: 93 20hp to 30hp?

why not just buy the right motor in the first place? be heaps cheaper and the motor will run better (as it was intended)

 

[ThePartsMan]

Re: 93 20hp to 30hp?

Do you happen to have a low hour long shaft 30hp tiller for sale.

 

[1fishbone]

Re: 93 20hp to 30hp?

I am looking at buying a 1993 Johnson 20hp but I'm not sure if it will be enough power.

Can the 25,30 or 35 hp carbs and intakes be put on to gain some power?

They are listed in the 20hp manual.

I knew someone that tried that, (to a different size motor) changed the power head and carbs.
He gained about a 7mph increase but it drank more gas!

 

[jasper60103]

Re: 93 20hp to 30hp?

Do you happen to have a low hour long shaft 30hp tiller for sale.

Yea, I know how you feel. I don't see too many 30-35hp on craigslist, especially long shafts. I have two in my barn, but I don't think I would sell either of them.

 

[blimp]

Re: 93 20hp to 30hp?

very likely you can put a 30hp (or pre-84 35hp) carb and intake on there and get some more hp. I have done it on a '86 and it appears to be the same motor. As long as it is the 31.8 cubic-inch 2-cylinder engine...

 

[rodbolt]

Re: 93 20hp to 30hp?

your most likly gonna be looking at an intake,carb and ex tuner change.
the 20 had the tiny intake, which can actually be modified, the small venturi carb which cant and some had different tuners.
the rest was mostly the same.