25 hp tricked out to 40 hp

[1946Zephyr]

Re: 25 hp tricked out to 40 hp

yeah right!

I one saw a 1972 20hp Johnson that was claimed to be 35hp after adding a 35hp carburetor to it, despite the 9 cubic inch dispacement dfference...

This model 25, was the 22 cube engine and it was based on the old 18 and 20hp displacement, with a lot of mechanical modifications, done at the factory. There's really nothing more you could do to these.

 

[Tig]

Re: 25 hp tricked out to 40 hp

How does someone trick out a 25 hp evinrude outboard to have 40 hp?

You mess with it and then make up a new horsepower number based on what you are hoping to accomplish by messing with it. When modifying, every perceived performance gain is matched by a very real decrease in reliability. I would pass on that motor.
If you want a 40, buy a 40.

 

[Tim Frank]

Re: 25 hp tricked out to 40 hp

You mess with it and then make up a new horsepower number based on what you are hoping to accomplish by messing with it. When modifying, every perceived performance gain is matched by a very real decrease in reliability. I would pass on that motor.
If you want a 40, buy a 40.

Well said, but I'd differ VERY slightly with the last item.
I'd say, if you want a 40, buy a 50....

 

[FLBert]

Re: 25 hp tricked out to 40 hp

My Cusion Just gave me two motors, (I made a post last night but I cannot find it now). One is an evenrude Coweling says 25 hp, Model no. FD-22E, When I go by the model No. it says that it is a 20 Hp Johnson. But when I look at the diagrams, the parts from the 1969 25 hp Evenrude is a better match, Such as the gear case and the lower unit. I am trying to locate a carb for this motor. My cusion pulled the carb from the motor below and put it on this one. He said that it never ran right after that

The other one is a 20 hp johnson Model No. FD-20C. Which I have not located any information on as of yet. The thing I have noticed is that all the parts are inter-changeable. Looks to be the smae power head, The lower unit and the gearcase are totaly different.

And, No, I am not going to try to make a 40 hp out of it.

I have located the other parts I need like the magneto and the gear case parts I need but, I can't find a carb and I am not sure which I should use once located. The one for the 20 hp or the 25 hp. The carb that was on there is shot.

I will try to post pics tomorrow.

I am going to re-start this post