Re: [OMC-Boats] Successful fuel pump closure

From: Glenn Comcast <glennhalweg@...>
Date: Thu, 2 Aug 2007 01:35:50 -0500

The NAPA pump requires venting to the flame arrester here's a copy of the

----- Original Message -----
From: <aperakes@...>
To: "Evinrude & Johnson Boats of the 1960's and 70's"
Sent: Thursday, August 02, 2007 12:39 AM
Subject: [OMC-Boats] Successful fuel pump closure

> Many thanks for all the great replies with ideas and suggestions to
> resolve
> my fuel pump blues. The final outcome was that I drove down to Michigan
> Marine Gear in St. Clair Shores, MI, yesterday to see what they had. It
> was
> an AC part # 40393. Judging from the paperwork in the box, it was built
> ~1985 and from the diaphragm up the pump was identical to my original.
> Below the diaphragm the design was changed to delete the bowl/filter,
> similar to the Sierra and Carter replacements. Given my anxiousness to
> preserve time on the water during my vacation, I went ahead and picked it
> up
> for $205, including 6% MI sales tax. I then used the upper portion of the
> new pump (which included the new diaphragm I needed) and the lower portion
> of my old pump. This allowed us to get back on the water today to enjoy
> some perfect lake conditions. The dealer of course advised against this
> route, saying I should install an in-line filter instead, but as he was
> all
> out of in-line filters as was another dealer, this seemed like the best
> option. Given more time, that would perhaps be a safer route, but the
> glass
> bowl/filter have functioned just fine for 40 years so I don't see reusing
> it
> as a major risk.
> What I am more concerned about is the vent to atmosphere on the top of the
> pump. My original had a simple plug tapped into the 3/8" fitting with a
> 1/16" bore to vent. When the diaphragm failed, naturally it began pumping
> fuel into the cavity above the diaphragm and eventually out the vent and
> into the bilge. As I said, the new pump was identical from the diaphragm
> up, except it did not have the plug. Instead, the instructions said "vent
> to a safe location and check it with each use for fuel leakage." Given
> my recent experience, this seems like some good advice, although I haven't
> figured out exactly how to execute this. Short term I reused the plug and
> am checking for any signs of leaks with high frequency. If anyone has
> come
> up with some design solutions for the vent, I'd be very interested in
> hearing them. I highly recommend anyone with an open vent like this take
> extra precaution and think seriously about making some revisions.
> Again, thanks for the many replies and happy boating!
> Lee: I'll contact you separately after I return from vacation.
> Andy Perakes
> 1967 Johnson Reveler
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> OMC-Boats@...
Received on Thursday, 2 August 2007

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