Old Johnson Outboard steering

[thetragichippy]

Hey Guys,

I'm planning a project and I had a question. I plan on using an old 3.5 HP johnson outboard on a homemade pontoon boat(I'm using hobie hulls). It will be a lite boat and I only plan on 3-4 MPH tops.

My question is throttle control. I will be using cable/pulley for steering but how do i control throttle? This motor has the throttle that goes from left to right across the front(if my memory serves me correctly). Could I use a throttle cable from say a riding lawnmower and mount it and bolt the end of the cable to the throttle control? Not sure how to handle it. Any help would be great.

 

[R.Johnson]

Re: Old Johnson Outboard steering

That engine was never made for, or intended to be remote controled. A lawn mower cable run's the throttle. You have to also advance the spark. That's what that lever on the front does. Gas, and spark advance both.

 

[thetragichippy]

Re: Old Johnson Outboard steering

I'm with you on it never being designed for it, but I think it can be done. That slider that advances spark and fuel should be able to be moved using a cable from a lawnmower, motorcycle, etc.... It just needs to move a pretty good distance and thats where the problem might start. Just seeing if anyone has any better ideas. I'm temped to put a 5 hp briggs aircooled outboard on it, but I have this one laying around.

 

[F_R]

Re: Old Johnson Outboard steering

Believe it or not, Martn had a remote control adapter for just such a situation. A real Goldberg, but...

However, you might want to consider a cable that only controls the carburetor throttle and leaves the spark at full advance. That is what they do on racing motors.

 

[thetragichippy]

Re: Old Johnson Outboard steering

Believe it or not, Martn had a remote control adapter for just such a situation. A real Goldberg, but...

However, you might want to consider a cable that only controls the carburetor throttle and leaves the spark at full advance. That is what they do on racing motors.

THANK YOU F_R

I will post what I come up with!