Fwiw, the fuel tank/sending unit will be under the floor plate that is screwed down in front of the rear bench seat (in this pic it is the area in front of the big center seat).
But it sounds like it is more than likely your gauge.
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| Author: | BRBHorizon [ Wed Jul 06, 2016 7:26 am ] |
| Post subject: | Fuel gauge |
I did a search and found lots of useful info but nothing quite fits what's happening. I just bought the boat (1999 Horizon 180 BR with 130 Johnson) The fuel gauge appeared to be working just fine the first few times out (partial tank). Then I totally filled the tank. Having been out a couple of time since, I noticed the gauge has not dropped. Now I started to pay attention and see that when the ignition is "on" (engine running) the gauge shows full, with the key in the "off" position, the gauge drops to just over half, which I suspect is about right. This doesn't make any sense to me. I have managed to get the gauge out from the dash but I cannot find the sender unit. I have a deck pate in the bulkhead right in front of the gas tank/filler (starboard side) which I have removed but I can't see the sender. Any ideas guys? Cheers |
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| Author: | rpengr [ Wed Jul 06, 2016 8:46 am ] |
| Post subject: | Re: Fuel gauge |
The gas tank is in the center of the floor, and the sending unit is normally at the back end of the tank. Look for a deck plate under your rear seats, or possibly under your engine well. Usually, the first thing to check is the wiring connections (including the grounds). Also, the sending unit is usually less reliable then the gage, however: When your ignition switch is off, the gage should drop to "E", so that makes it sound like you have an issue with the gage itself. Also, you can test the sending unit without accessing the tank in the floor. You just need a digital electrical meter for ohm readings: . Disconnect the "S" lead from the back of the gage. . Check the resistance ("Ohm" reading) of the sending unit...check between the "S" wire and ground. . According to Faria, the Ohms should be: --- 240ohm at Empty --- 203ohm at Half Tank --- 33.5ohm at Full When you rock the boat, you should also see a fluctuation in the ohms because of the sloshing. If the sending unit seems to check OK, and the gage reads wrong even with cleaned up wires, then replace the gage. http://faria-instruments.com/site_manuals/IS0085E.pdf Ray |
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| Author: | BRBHorizon [ Thu Jul 07, 2016 8:31 am ] |
| Post subject: | Re: Fuel gauge |
Thanks for the tips. Looks like I should be able to trouble from the gauge end. I'll check that out tomorrow. Not sure if this makes a different as far as the tank/sender is concerned but I have an outboard (not I/O) Thanks |
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| Author: | Craig-o [ Thu Jul 07, 2016 4:57 pm ] |
| Post subject: | Re: Fuel gauge |
Does this boat have an automotive-type gauge cluster made by VDO? If so, my money is on the cluster and not the sender... Do a search for VDO cluster; you'll find lots of postings. |
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| Author: | 190 HORIZON O/B [ Fri Jul 08, 2016 10:23 am ] |
| Post subject: | Re: Fuel gauge |
I have the same problem, but on my 1995 190 horizon O/B but unsure if VDO made that gauge cluster. in seraching I do know that you can get the VDO cluster diagram online from CDI electronics. or even send it in for repair/refurbish for $350+ |
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| Author: | BRBHorizon [ Fri Jul 08, 2016 11:36 am ] |
| Post subject: | Re: Fuel gauge |
As best I can tell it's a Faria gauge and the good news (I think) is I narrowed it down to being the gauge. I testing the resistance from the sender and not only does it seem right but it goes up and down as I tilt the boat on the trailer. Not only that but the gauge is stuck at the half way mark even when totally disconnected. I hope my findings are correct. Thanks for all the help guys |
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| Author: | rpengr [ Fri Jul 08, 2016 12:50 pm ] |
| Post subject: | Re: Fuel gauge |
BRBHorizon wrote: As best I can tell it's a Faria gauge and the good news (I think) is I narrowed it down to being the gauge. I testing the resistance from the sender and not only does it seem right but it goes up and down as I tilt the boat on the trailer. Not only that but the gauge is stuck at the half way mark even when totally disconnected. I hope my findings are correct. Thanks for all the help guys That seems to be the gage for sure. With no power applied, it should have dropped to "E" Ray |
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| Author: | kmack [ Fri Jul 08, 2016 11:38 pm ] |
| Post subject: | Re: Fuel gauge |
Fwiw, the fuel tank/sending unit will be under the floor plate that is screwed down in front of the rear bench seat (in this pic it is the area in front of the big center seat). But it sounds like it is more than likely your gauge. |
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| Author: | BRBHorizon [ Sat Jul 09, 2016 8:16 am ] |
| Post subject: | Re: Fuel gauge |
New gauge ordered so fingers crossed. Thanks again for the help |
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| Author: | BRBHorizon [ Tue Aug 02, 2016 8:51 am ] |
| Post subject: | Re: Fuel gauge |
Thanks for all the replies they were a big help. Installed new Faria gauge and it seems to have solved the problem. It was far from an easy task, I'm 6'4" tall and working behind the dash was a chore. Why they insist on making wires so short is beyond me. The new gauge did not allow for pre-wiring them mounting. It had to be fully mounted first and then have the wires connected. There were a few choice words but it ended up OK. Cheers |
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| Author: | rpengr [ Tue Aug 02, 2016 10:03 am ] |
| Post subject: | Re: Fuel gauge |
Glad to hear it. Thanks for the follow up. |
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