have you ever rebuilt this fuel pump?

[outboardnut]

#236018

From what I know there are no rebuild kits for this pump.
I plan to use it on a Johnson 25 hp 1955 RDE-17.
I was planning on finding one at Tomahawk
I figure all I would have to do is find the correct thickness neoprene and I would be set.
But of course making nice holes for the screws may be a problem.
What are your thoughts?

[Ed@deathwish-outboards]

#236129

For making holes in gaskets I have a selection of old paper punches. If the material is thin you can sandwich it in between some heavy paper or thin cardboard. You could also clamp it between the pump housing halfs and run a sharp drill through the holes.

[trex014]

#236392

While I have yet to actually rebuild one of these pumps, I have given it considerable thought on how I would do it. The original diaphragm (#11 in the diagram) is actually two sheets of material with a brass rivet holding the two sheets together. Spring (#12) rides against the rounded head of the rivet so it does not wear through the diaphragm material. I guess you could find a modern equivalent of that brass rivet but I’m not sure how well it would work.

My plan when I do this project will be to use a single sheet of diaphragm material and separate the brass rivet from the old diaphragm and then solder it to the spring (#12) so there is a smooth surface riding against the new diaphragm.

Knock on wood, I personally have not yet found one of these fuel pumps in non functional condition, and I’ve been through over a dozen of this style. They all seem to pump just fine and I use regular ethanol pump fuel but I always run the motor dry before storage and keep the fuel fresh.

The holes for the screws don’t have to be as perfect as you think, as long as the gasket openings where air and fuel are moving through are pretty precise, just take a big needle and poke a hole through for the screws and call it good.

[crosbyman]

#236416

think this might fit …

Joining AOMCI has priviledges 🙂

[outboardnut]

#236494

crosbyman-what did you try to post?

[crosbyman]

#236515

similar fuel pump replacement… does it not show up ??

not original but if it works….

Joining AOMCI has priviledges 🙂

• This reply was modified 1 year, 2 months ago by crosbyman.

[outboardnut]

#236521

On my screen your post is blank
“kindle We’re sorry. This preview is unavailable.”

[crosbyman]

#236522

here is a screen capture… strange it shows up on mine

Joining AOMCI has priviledges 🙂

[davidk]

#236524

Blank on mine

[crosbyman]

#236531

well… we had lots of spoofing before… now it is blanks ?? mine shows up fine

how the the screen shot come out… blank also ??

Joining AOMCI has priviledges 🙂

[outboardnut]

#236538

The reason I posted the pump is that is small
Looks good for retro fit
I did see the screen shot

[amuller]

#237318

I have made diaphragms for these with this material from McMaster-Carr: 8969K531 “Ultra-Strength Oil-Resistant Buna-N Rubber, Sheet, 12″ x 12″, 1/64″ Thick” $5.49.

I can’t claim years of testing but it seems to hold up.

https://www.mcmaster.com/catalog/127/3862

[outboardnut]

#237336

I went to a meet a few weeks ago and saw how the diaphragm was constructed.
trex014 was spot on
trex014 solution sounds promising but I’m not going to try it.

[seakaye12]

#237845

outboardnut could you post the corresponding parts listing to the parts diagram that you posted above?

Thanks!

[outboardnut]

#237850

Hi I got my info from here
https://www.richardlpaquette.ca/25DE15V.PDF