AC Fuel gauges new tanks

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TADTOOMUCH
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Location: S.W. Michigan

AC Fuel gauges new tanks

Post by TADTOOMUCH » Sun Apr 28, 2019 8:58 pm

I replaced my galvanized fuel tanks with two Moeller poly tanks. When I hooked up my sender to the gauges they show full. So I removed the resistor from the back of the gauges thinking that would help. Now the engines won’t start and it pops the breaker on the dash. Do I need new gauges? Everything is wired properly and senders both give a range of 33-240 ohms? Any help?
Boat Name: A TAD TOO MUCH
Model: 1978 F-32 Sedan Cruiser
Engines: Twin Chry 360's 625 hrs original engines

2013 Mercury 300 Ocean Runner 9.9hp Merc 4 stroke

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prowlersfish
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Re: AC Fuel gauges new tanks

Post by prowlersfish » Sun Apr 28, 2019 9:24 pm

Sounds like you may have hooked the gauge power wire to ground or some how caused a short there . Are senders the ones you had or new with the tank ?
TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D
2009 TROJAN RENDEZVOUS
Port Kinsale 2010 & 2011. Solomons get together 2011.

mikeandanne
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Re: AC Fuel gauges new tanks

Post by mikeandanne » Sun Apr 28, 2019 9:43 pm

When I put new moeller tanks in the same year f32, the old AC gauges would not work, had to get new ones.....the resistance range was off....did you connect the new senders at the termination block in the side panel ? Mike
78 F 32

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TADTOOMUCH
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Location: S.W. Michigan

Re: AC Fuel gauges new tanks

Post by TADTOOMUCH » Mon Apr 29, 2019 8:47 am

Thanks for the replies guys. I did run the ground wire all the way to the termination block in the bottom of the gauge cluster in the dash. I ordered two new gauges and will install them this weekend and let you know. I suspected as much that the resistance range would not work with the new senders that came with the new tanks. Hopefully this solves the problem and I will have trouble free summer as far as fuel delivery goes. Now if I can keep it from snowing here in Michigan that would be great.
Boat Name: A TAD TOO MUCH
Model: 1978 F-32 Sedan Cruiser
Engines: Twin Chry 360's 625 hrs original engines

2013 Mercury 300 Ocean Runner 9.9hp Merc 4 stroke

User avatar
prowlersfish
2019 Gold Support
2019 Gold Support
Posts: 11673
Joined: Sat Nov 05, 2005 6:56 pm
Location: Lower Chesapeake Bay ,Va

Re: AC Fuel gauges new tanks

Post by prowlersfish » Mon Apr 29, 2019 6:40 pm

We can try and help you with the boat but help with snow is beyond what we can do .
TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D
2009 TROJAN RENDEZVOUS
Port Kinsale 2010 & 2011. Solomons get together 2011.

User avatar
TADTOOMUCH
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Posts: 500
Joined: Thu Jul 12, 2007 9:58 am
Location: S.W. Michigan

Re: AC Fuel gauges new tanks

Post by TADTOOMUCH » Mon May 06, 2019 2:23 pm

Well I installed two new fuel gauges (sierra heavy duty ) and they work great. If anyone needs two new AC Delco fuel gauges for their Trojan, let me know. I have two and they work great. Just didn't work with my new fuel tank sender unit.
Boat Name: A TAD TOO MUCH
Model: 1978 F-32 Sedan Cruiser
Engines: Twin Chry 360's 625 hrs original engines

2013 Mercury 300 Ocean Runner 9.9hp Merc 4 stroke

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