Putting a later model timing/carb system on a ’55 Evinrude 25HP?

[mr-asa]

I’ve got a ’55 Evinrude 25HP. I have been told that I can take a later model carb and ignition system (from, I think, a ’58 or ’59 35HP?) and install them. The benefit is that the later models had a setting at WOT that would allow the engine to run more efficiently and save mileage.

Anyone have info on this and what I might need to do to get it setup and working?

[frankr]

I think you are speaking of the “Fuel Saver” system that first appeared on the 1956 30hp What it does is after getting up on plane, backing off with the throttle just a bit closes the carb throttle butterfly somewhat. Then, it is running at full spark advance and partially closed carb. Works ok on some boats, not so effective on overloaded rigs where full throttle is needed to keep it up on plane.

[mr-asa]

Sounds like it. Is it straight forward to get it installed on a 25HP?

[frankr]

I don’t know of-hand exactly what would have to be changed. I suppose a 30hp parts motor would be handy.

• This reply was modified 4 years, 4 months ago by frankr.

[Bob Wight]

Don’t know that it would help you much but here’s a couple progress pics of the fuel saver rod/linkage from when I was reassembling my ’56 30hp Johnson. Not sure if the cam roller assembly would mount up on your 55 intake but maybe so. If not, maybe you can swap out the ’56 manifold onto your ’55?

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."

• This reply was modified 4 years, 4 months ago by Bob Wight.
• This reply was modified 4 years, 4 months ago by Bob Wight.

1 user thanked author for this post.

mr-asa

[mr-asa]

Definitely helpful. I’ve got the carb and ignition plate from a ’58, but I don’t have the intake plate. Thanks Bob

[Author]

Posts