PLEASE HELP WITH THIS PROBLEM

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CAJUN95

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Mar 13, 2007
Messages
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HELLO I JUST BOUGHT A 95 RAIGIN CAJUN WITH 95 MERC XR6 150 AND ITS IN MINT SHAPE BUT THE FUEL GAUGE WHEN I TURN THE KEY GOES ALL THE WAY TO FULL I MEAN BEYOND FULL AND THERE IS A 1/2 TANK I BOUGHT NEW SENDING UNIT AND IT STILL DOES IT CHECKED ALL THE WIRES EVEN RAN 2 NEW WIRES FROM THE SENDING UNIT TO THE FUEL GAUGE AND IT STILL DOES IS IT THE GAUGE?? OR SOMETHING I MISSED

AND MY OTHER PROBLEM IS THAT THE LAST TIME I WAS RUNNING THE BOAT AT WOT MY RPM GAUGE READS 6900-7100 WHITCH IS GROUNDS TO BLOWING UP MY MOTOR BUT IT DOESNT SOUND LIKE ITS RUNNING HIGH RPM ( IVE HAD OTHER BOATS )IS THERE A WAY TO CHECK THE TACH OR JUST BUY ANOTHER IF YOU GUYS COULD HELP ME YOU WOULD SAVE ME FROM BREAKING THINGS IN FRUSTRATION
 
Silvertip

Silvertip

Supreme Mariner
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Sep 22, 2003
Messages
28,771
Re: PLEASE HELP WITH THIS PROBLEM

You said you ran TWO new wires from the sender to the fuel gauge. Why two -- only one is needed. The gauge needs +12V when the key is on. The sender wire connects to the sender terminal and the ground terminal connects to the ground terminal on any other gauge. The instrument light can also hook to the light terminal on any other gauge. The fuel sender does need to be grounded.
 
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CAJUN95

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Mar 13, 2007
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Re: PLEASE HELP WITH THIS PROBLEM

EarestTBass said:
CAJUN95 said:
and the link you gave me doesnt work
Click to expand...

The link works fine for me.
Click to expand...

OK I DID EVERYTHING THE TELEFLEX LINK TOLD ME TO DO ...DISCONNECT THE SENDER WIRE ANS SHORT IT OUT WITH A WIRE TO GROUND AND IT DID THE SAME THING THE LINK SAID IT WOULD MEANING THE GAUGE WORKS BUT I KNOW THERE IS ABOUT A 1/2 TANK OF GAS SO ITS WRONG I SHOULD JUST GO GET ANOTHER GAUGE AND SEE I GIVE UP
 
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capngregg

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Oct 26, 2006
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Re: PLEASE HELP WITH THIS PROBLEM

Cajun,

Some years ago I had come across a '68 Century 19' and of course it had an inoperative fuel indicating system. I checked several sources and found that it had a 30 gallon fuel tank and verified that by accessing the tank and looking at the data plate.

I installed an aftermarket tank level indicator and found that without adjusting the float position, the quantity level was inaccurate. I emptied the tank and used a long wooden dowel rod to fabricate a fuel level "stick". By measuring from the bottom of the tank to the point at the top that I considered to be the "full" point, I marked the stick accordingly.

The empty point was determined by calculating the distance between the bottom of the pickup stand pipe and the bottom of the tank. I added another inch to that measurement to make sure I had a bit of a reserve. Halfway between those two points I marked the 1/2 tank level.

By ensuring the tank and boat were "on the level" so to speak, I could add fuel to the tank little by little and meaasure the fuel level with the stick. This in turn was used to adjust the fuel level sending unit from empty to full. It took a few tries to get the desired results but it has work great for the last 19 years.

By the way, I still carry that stick on the boat just in case the sending unit or the gauge die and untimely death.

My tank was shaped almost rectangularly with no odd offsets or anything so it was pretty straight forward. Some of the newer boats have custom formed tanks that are unusually shaped and therefore will have non-linear fill rates. All that really counts though is knowing when the tank is full and when it is almost (reserve) empty.

Good Luck!8)
 
WillyBWright

WillyBWright

Fleet Admiral
Joined
Dec 29, 2003
Messages
8,200
Re: PLEASE HELP WITH THIS PROBLEM

Just to be clear, disconnect the sender wire at the sender and turn on the key. If the needle doesn't move, good so far. Touch the wire to the sender ground wire and if the needle pegs, the gauge is good. Connect the wire back to the sender and if the needle pegs, the sender is shorted.

They usually fail the other way (no movement), but oh well. Disconnect the batteries to avoid sparks while replacing. The screws look equally distributed, but they aren't. You have to make sure all holes line up when installing the replacement. Instructions and a new gasket will come with it.

NO SMOKING! ;)

You'll have to adjust the length of the lever to the depth of the tank. Subtract an inch from your depth to allow an inch of reserve once the gauge shows Empty.
 
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CAJUN95

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Joined
Mar 13, 2007
Messages
7
Re: PLEASE HELP WITH THIS PROBLEM

WillyBWright said:
Just to be clear, disconnect the sender wire at the sender and turn on the key. If the needle doesn't move, good so far. Touch the wire to the sender ground wire and if the needle pegs, the gauge is good. Connect the wire back to the sender and if the needle pegs, the sender is shorted.

They usually fail the other way (no movement), but oh well. Disconnect the batteries to avoid sparks while replacing. The screws look equally distributed, but they aren't. You have to make sure all holes line up when installing the replacement. Instructions and a new gasket will come with it.

NO SMOKING! ;)

You'll have to adjust the length of the lever to the depth of the tank. Subtract an inch from your depth to allow an inch of reserve once the gauge shows Empty.
Click to expand...

thanks but i did all that already i removed the gauge and sender and wired it in my garage the way teleflex told me to do and the same thing happened its got to be the gauge plus i dropped it and broke the glass so either way i have to replace it and re wire but thanks for all your help i will let you all know if i fix it hoping
 
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perkdp

Petty Officer 1st Class
Joined
Sep 25, 2002
Messages
237
Re: PLEASE HELP WITH THIS PROBLEM

isn't there a float attached to a reostat to the sending unit to the guage? what's the possibilty something was changed and the twists in the float mechanism is turning the reostat too much ?
 
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CAJUN95

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Joined
Mar 13, 2007
Messages
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Re: PLEASE HELP WITH THIS PROBLEM

perkdp said:
isn't there a float attached to a reostat to the sending unit to the guage? what's the possibilty something was changed and the twists in the float mechanism is turning the reostat too much ?
Click to expand...

i doubt it its a brand new sender and the old one did the same thing
 
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CAJUN95

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Mar 13, 2007
Messages
7
Re: PLEASE HELP WITH THIS PROBLEM

PUT NEW GAUGE IT WORKS GREAT NOW THANKS FOR ALL YOUR HELP
 
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