Re: [OMC-Boats] Fuel Sending unit

The senders are stock Stewart-Warner 240-33 ohm "floating arm" units
available just about anywhere with industry-standard 5-bolt mounting
flanges. You can pick them up for around $25 - $40. BE sure and
measure the tank depth and insure the arm has enough clear travel for
the sender arm. Before you discard your original sender, check it with
a ohm meter. 240 Ohms in the EMPTY position, around 30 to 40 ohms in
the FULL position. Usually the wiring, ground or gauge fails long
before the sending unit but not always. Also check the float for
leakage (buoyancy).

There are better sending units employing reed or inductive
technologies that require sizing to the near-exact height of the tank.
Moeller offers them as well as others. I've never tried them but I
have replaced the original sending unit with an AC branded unit I got
at NAPA years ago.

Again any of these DO NOT need to be MARINE-RATED. Just be sure and
properly ground the tank when you re-install it and install a new
gasket and double check for leaks.

By checking the tank professionally cleaned and re-lined at any
radiator shop, they will also pressure test it for leaks.

Just google 240-ohm Fuel sending units you'll find toms of hits.

LEE

On Aug 9, 2009, at 4:36 PM, BLDFW wrote:

> Since I have my tank out and cleaned up, and since it's not working,
> now is the time to change out fuel sending unit. I've looked in my
> parts book but it does not cover the gas tank or the sending unit.
> I checked online for a universal sending unit but not seeing
> anything listed for my local parts store.
>
> Anyone swap one out? What did you do for a replacement?
>
> Also, I cleaned out my tank and overall it's pretty clean. I did
> detect some surface rust on the inside roof of the tank which I took
> a wire brush to and got as much as I could reach off. I'm thinking
> between the pickup tube screen (which does not rest on the bottom,
> and the inline fuel filter any residual particles that might fall
> off will likely not be problematic. Given that, I'm not seeing a
> need to have the tank relined. It doesn't look that cruddy and it's
> not showing any signs of being compromised. Thoughts?
>
> -Bill
> Dallas, TX
> 1970 Evinrude Explorer - 155 Buick V6 - OMC Sterndrive
> http://www.photobucket.com/evinrude_explorer
>
>
>
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Received on Sunday, 9 August 2009