54 Evinrude Fleetwin 7 1/2 powerhead years

[AlwaysTradinOutboards]

I recently acquired a 1954 evinrude fleetwin 7 1/2 horse. After cleaning out the rats nest and seeing the amount of corrosion on the front of the block and carb areas I am thinking I may be better off swapping another powerhead onto this center section as the corrosion and the fact that neither cylinder has fire. What other year powerheads will bolt to this motor? If nothing else does anyone have any input on cleaning off corrosion from mouse urine? Paid a little much for the motor (50 bucks) but it came with the original 2 line cruise a day tank and I figured that was worth 20 or 30 by itself. Any help would be appreciated. Thanks

 

[F_R]

Re: 54 Evinrude Fleetwin 7 1/2 powerhead years

I recently acquired a 1954 evinrude fleetwin 7 1/2 horse. After cleaning out the rats nest and seeing the amount of corrosion on the front of the block and carb areas I am thinking I may be better off swapping another powerhead onto this center section as the corrosion and the fact that neither cylinder has fire. What other year powerheads will bolt to this motor? If nothing else does anyone have any input on cleaning off corrosion from mouse urine? Paid a little much for the motor (50 bucks) but it came with the original 2 line cruise a day tank and I figured that was worth 20 or 30 by itself. Any help would be appreciated. Thanks

1954 and 1955 will fit. The hoods are different so you would have to swap hood mounts too.

 

[1946Zephyr]

Re: 54 Evinrude Fleetwin 7 1/2 powerhead years

Gotta love them rats.

Are you sure your powerhead is shot? Maybe you just need to replace the areas that are affected. Maybe just a carb and ignition system replacement may be cheaper.

You got a pretty good deal for 50 bucks. Those tanks alone can go for 75.

 

[AlwaysTradinOutboards]

Re: 54 Evinrude Fleetwin 7 1/2 powerhead years

Actually the powerhead feels good as far as compression. Neither cylinder fires but I can see no visible flaws in either of the plug wires so I'm assuming points or coil is shot. The front of the powerhead just has an extreme amount of corrosion from urine and as far as the carb and intake area goes it looks like a big ball of "Dukie". Is there a good cleaner like Chem-Dip or something similar I can soak the corroded parts in to clean them real good? The mice must have set up residence for many years. If I could clean it up enough to repaint that would be sufficient. Just thought it may be easier to replace the entire powerhead but after seeing there are only 2 years that are the same that may be out of the question. Thanks for the info.

 

[bktheking]

Re: 54 Evinrude Fleetwin 7 1/2 powerhead years

A glass blaster will take all that crap off and not do damage and leave it ready for paint. If you have a compressor there is site if you google showing you how to make your own soda blaster, it's a tube with a hole cut in it and one end placed into a box of baking soda, it will clean that carb like new.

 

[1946Zephyr]

Re: 54 Evinrude Fleetwin 7 1/2 powerhead years

Okay, here is what I would do:

Remove the intake manifold. And strip it down completely to the bare metal.
spray a new coat of zinc chromate and 1954 Evinrude blue and that is good.

Pull the flywheel. Chances are, the points need to be cleaned and possibly replaced. Replace the condensors for sure. If the coils are "antique" and all cracked in the insulation, then those will need replacing.

No doubt that the carb is eaten up pretty good, so you may as well get a new one.

Is there any possibility that you could post some pics? This would give us an idea of what all is eaten up by rat ****.

Anyhow, those are a couple good places to start. I think your powerhead is okay and may be good enough to return to service. I would make sure that the venturi of the carb is completely clean and take a compression test. First, spray some WD-40 into the cylinders and get everything free and spinning around nicely.

I think if you get decent compression, your powerhead will be okay.

 

[samo_ott]

Re: 54 Evinrude Fleetwin 7 1/2 powerhead years

I would check compression with a gauge before doing any work to it. If it's good then I would look at spark. It's probably the coils. Then carb... Post pics so we can take a look, it might just be superficial.

 

[1946Zephyr]

Re: 54 Evinrude Fleetwin 7 1/2 powerhead years

Yea, I worked on a few of those. Steve, you seconded my advice. Check the compression first before you go into it.

I fixed a guy's Honda outboard once that was riddled with rats nests and ****. LOL I had to replace plug wires, because they chewed the insulation right off. LOL Why would they do that? That stuff is nasty.