Fuel tank sending unit leaks

Carol & Bob Larsen · Posted: Sun Mar 06, 2016 9:14 pm Post subject: Fuel tank sending unit leaks

I have a 20 gal tank that was disassembled by the previous owner for cleaning. The sending unit leaks around the joint when I fill it full. I tried removing it and using Permatex to seal it up, but it still leaks (the Permatex did slow it down some). Any suggestions on how to repair it?

Thanks,

Bob

South of Heaven · Posted: Sun Mar 06, 2016 9:23 pm Post subject:

Bob: Sorry, I can't help you with your problem (I'm sure another C Brat will do that shortly!)

It's good to see another Mass. C Dory owner on here! I launch frequently in Buzzards Bay during the warmer months (Bourne/Onset area). Last season I was contemplating heading further west in the water towards your neck of the woods. Now that I have more fuel range I'll definitely do it this year, plus Martha's Vineyard.

Good luck with you fuel leak issue.

T.R. Bauer · Posted: Sun Mar 06, 2016 11:32 pm Post subject:

Mine did that too. They never leaked much, more like an occasional seep, but I finally just replaced the tanks as I don't want gas leaking on the boat.

rogerar · Posted: Mon Mar 07, 2016 6:20 am Post subject:

I have the same problem, where can I source new ethanol proof gaskets or gasket sealer?
What if I buy the whole sender, is the gasket ethanol-proof?
Thanks
Roger

BrentB · Posted: Mon Mar 07, 2016 10:30 am Post subject:

Who makes the tank and fuel sender uni
Posting pics would help

I don't know if this will work but Moeller
has 5 Hole Gasket for Electric Sending Units (Includes Mounting Screws)
# 035728-10

see
http://moellermarine.com/moeller-marine/fuel-accessories/5-hole-gasket-for-electric-sending-units-includes-mounting-screws-035728-10/
or
http://moellermarine.com/

If a WEMA sender, you can measure it and email them for a gasket. see
http://www.wemausa.com/

Carol & Bob Larsen · Posted: Mon Mar 07, 2016 5:51 pm Post subject: moeller gasket

Thanks for the info Brent. I just ordered one from Amazon. I'm sure the old one will be toast after I pry it out of the Permatex. I have a suspicion that one or more of the screw hole may be stripped. I'll try to get the tank out this week...

Bob

BrentB · Posted: Mon Mar 07, 2016 6:17 pm Post subject:

Welcone, Bob

Request an album for pics and
post an update!

kennharriet · Posted: Tue Mar 08, 2016 12:12 am Post subject:

I replaced the Moeller fuel sending units on my tanks a couple years ago and had the same problem with leaking. Even though the holes in the gasket appear to be evenly spaced, they are not. The gasket will only fit properly in one position. Then be careful not to over torque. There should not be any need for sealant. Good luck, Ken

rogerar · Posted: Tue Mar 08, 2016 5:23 am Post subject:

THANKS! Love this site and it's knowledgeable wonderful members.
Roger