Topic: 1971 Johnson 9.5 Fuel pump kit? – Antique Outboard Motor Club,Inc

This topic has 9 replies, 3 voices, and was last updated 1 year, 5 months ago by crosbyman.

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June 3, 2023 at 6:03 pm #276737
Buccaneer
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US Member
I was thinking about making a diaphragm for this little square fuel
pump from the subject motor, instead of spending $100 for a
new OMC one, or $10 for some Chinese junk, but then I seen
the kit below on EBay.
The EBay ad doesn’t list the 9.5 hp but just about every other motor.
It sure looks like it may be correct, looking at the one I took apart today.
Anyone know for sure? Thanks.

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June 4, 2023 at 4:06 pm #276760
fleetwin
Participant
US Member - 2 Years
Sorry, don’t know if that will work or not. My understanding is that the early versions of this fuel pump can not be rebuilt, but the later ones can. You have the kit, nothing to lose by trying.

Again, are you sure the pump isn’t working? Please don’t pull it apart “just because”, chances are good that a pump that was working before the rebuild won’t work afterwards. It is extremely important to make sure all those pieces maintain their orignal orientation. Also, many of the pumps have a little arrow indicating “up”, the pump won’t work if the arrow is pointing in a different direction
June 4, 2023 at 5:43 pm #276762
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To clarify, the pump on the motor is working, but it’s been on the motor for 7 years
since I have it, and Lord knows how long before that.
I just wanted to have a good pump ready if needed, so I was thinking about trying
to put a kit in the square pump from my “parts motor”.
I don’t have the kit yet, the photos of the kit were from EBay.
I guess I’ll try the kit and see if it fits the pump.

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June 11, 2023 at 6:17 pm #276963
Buccaneer
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I installed the $15 fuel pump kit in my spare, little square fuel pump today.
I don’t plan on trying it out anytime soon, but it passes the “Blow Test”
as described by the instructions when I was done.

It was a little nerve racking. The instructions generally “good”, but
it doesn’t me I didn’t get confused at times!

Not sure it will work better than the $12 Chinese fuel pumps,
but the kit material seem to be of good quality.

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June 11, 2023 at 9:20 pm #276968
crosbyman
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Canada Member - 2 Years
the main thing to do imho is to scribe one side with a felt marker to refit them as they were. for springs and mushrooms I glue them in place with a touch of Crazy glue to prevent these tricky parts from falling over during assembly or worse…. flying to nowhere 🙂

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June 11, 2023 at 11:09 pm #276970
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Not sure what the crazy glue would do to the diaphragm, but
marking it before taking it apart good advice! I took photos,
and marked it.

crosbyman wrote:

the main thing to do imho is to scribe one side with a felt marker to refit them as they were. for springs and mushrooms I glue them in place with a touch of Crazy glue to prevent these tricky parts from falling over during assembly or worse…. flying to nowhere 🙂

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June 11, 2023 at 11:27 pm #276971
crosbyman
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Canada Member - 2 Years
the glue does not touch the diaphragm. It goes on the base nipple where the spring rides and secures it in place and…on the plastic mushroom’s underside that fits in the Spring.

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June 12, 2023 at 9:07 am #276973
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Tubs, Nothing happens when I click “Reply” on my PM reply,
so here’s my response regarding orientation of the pump inlet
and outlet………

———————————

The “running” 9.5 had the older? “diamond” shaped fuel pump.
The parts motor fuel pump that I rebuilt, had the “newer?” style, smaller “square”
fuel pump, so I’m not sure if it’s even possible to put the inlet and outlet
in the same orientation as each other. Different pumps, but same powerheads,
so I “think” I got it back together in the original configuration.
$15 kit, but I’m hopeful it’s than a Chinese pump.

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June 12, 2023 at 9:08 am #276974
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I’ve never used Crazy Glue where I didn’t glue something I wasn’t suppose to,
including my fingers, lol

crosbyman wrote:

the glue does not touch the diaphragm. It goes on the base nipple where the spring rides and secures it in place and…on the plastic mushroom’s underside that fits in the Spring.

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June 12, 2023 at 10:32 am #276985
crosbyman
Participant
Canada Member - 2 Years
after you loose a spring or a mushroom…you will like Crazy glue… up to you 🙂

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1971 Johnson 9.5 Fuel pump kit?

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