johnson 20 hp when first came out?

[raczekp1]

hi.
i need some history about 20 hp construction.
maybe someone can give me some overview about this construction?
thanks

 

[F_R]

Re: johnson 20 hp when first came out?

Do you mean the 1966 22 cubic inch, model FD-20, or do you mean one much newer?

 

[raczekp1]

Re: johnson 20 hp when first came out?

i mean when first 20 hp motor came in,
the oldest construction of 20hp
in interesting in history of this motor, so thats why im asking.
thanks for any input.

 

[F_R]

Re: johnson 20 hp when first came out?

If it is history you want, you have to go back to the 1953 Evinrude Fastwin 15 hosepower at 19.94 cubic inches. That motor was improved somewhat to make it quiter in 1955, but still 15hp. The 15hp was added to the Johnson lineup in 1956. In 1957 the cylinder bore size was increased to 2-1/2 inches, increasing the displacement to 22 cubic inches and horsepower to 18. In 1966, Johnson modified the 18 a bit to make it horsepower, so that is the answer to your question.

The 22 cubic inch motor continued to be made as an 18 by Evinrude and 20 by Johnson. In 1974, the same motor was again modified to produce 25hp, from the same 22 cubic inches, and sold along side the 18-20hp.
In the late 1970's the 22 cubic inch motor was dropped, and replaced by a much different design making 35hp. The 35hp was detuned to make several versions producing 20, 25, 30hp. But not the same motor as the old 22 cubic incher. That is why I asked what vintage you are interested in.

BTW, Evinrude had a 20hp motor, model U, in 1929. Needless to say it was not even close to resembling the 15-18-20-25 of the 1950-70 period.

 

[kfa4303]

Re: johnson 20 hp when first came out?

Hi rac. I actually have a '66 FD-20C, 20 HP and it's awesome. Very strong for its size and couldn't be simpler to work on and maintain. Mine had good compression when I got, but was otherwise dead as a doornail when I got it and a parts motor for $100 total. Thanks to the forums here, I got it up and running strong in about 48 hrs., 24 of which was just waiting for parts. If you have the opportunity to get one for a good price, I say go for it. Granted, they're not as cool looking as their '50s era cousins, but the white fiberglass cowls are starting to grow on me now that I'm on my third '60s era motor. Here's a pic of mine. She's no looker, but she starts on the first pull and pushes me along in my 14' tinny at over 20 mph. (btw the PVC tiller extension works great and kind of matches the all white theme

 

[raczekp1]

Re: johnson 20 hp when first came out?

yes its nice old motor with long history.
thanks for both of you.
many years past but you still know history about each motor,
thanks once again

 

[kbait]

Re: johnson 20 hp when first came out?

F R waxes poetic! Love reading his posts/advice..

 

[1946Zephyr]

Re: johnson 20 hp when first came out?

I thought the 22 cube 25 came out in 1969?

Anyhow, I'm a big fan of those 22 cube motors and have had several in the past. They're easy to work on, parts are cheap and they're very reliable.