2002 Sundancer 510DA Fuel Tank Sending Units

[cersos]

All of my fuel tank sending units are toast. I found one under the stairs under a hatch, but the other 2 tank sending units are evading me.

Does anyone know where they are?

 

[stephens013]

Call the sea ray guys at Merritt Island ( 321-449-8628 ). They'll tell you how to get access to the satarbord sending unit. The center unit requires removing the salon floor. I know because my center sending unit it toast. Just have to relie on calculated run time and so on. Having said that, make double sure it's the sending unit and not the wiring or the guage. That's a pretty easy multi meter check. Gauges are easy to replace.

 

[cersos]

Thank you for the quick reply. I just assumed the sending units. I'll test the easily accessible ones first.

Thanks,
Steve

 

[Brett H]

Check out post #67 on the following:
http://clubsearay.com/index.php?threads/official-510-da-owners-group.94762/page-4#post-1121099

The Service School pdf on page 14 seems to indicate the specifics you are looking for.

 

[cersos]

You guys are the best!

 

[dtfeld]

This isn't a difficult job depending on access, and I just replaced both of mine with Maretron TLM-100's tank level senders which put the fuel gauge on a NEMA2000 network.

I'm assuming these are the standard SAE 5 bolt pattern regardless of what type sender, but be aware that these can only go in one way. Mark the center of the each bolts on the tank and mark a line across the top of the sender onto the tank for reference reinstalling (pointing forward for example).

Once you get the old sender out mark the top of the gasket (if you flip it, it wont line up), line up the holes and transfer your reference line onto the new gasket and sender. Carefully line up your reference lines on the gasket and then the sender and get one bolt started. Once you have 1 started, the rest line up easily.

Here's what the bolt pattern looks like.

 

[cersos]

Great information, thank you.

 

[ttmott]

Also, many of us changed to these WEMA sensors. They are a much better design, reliable, accurate, plug-n-play, and very economical.
Like Dave (dtfeld) says above they are a standard SAE 5 hole flange. All you need is the depth of the tank(s).
https://kus-usa.com/product/sss-ssl-sender/