Fuel tank

mitch_houser

Cadet
Joined
Aug 26, 2011
Messages
25
05 Kenner 180v model 90 merc.fuel gauge not working wondering where to find sending unit to start testing before throwing parts at it good time of year to make repairs Thanks in advance Mitch
 

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Scott Danforth

Grumpy Vintage Moderator still playing with boats
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Jul 23, 2011
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49,893
Look for the fuel tank inspection hatch
 

Chris1956

Supreme Mariner
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Mar 25, 2004
Messages
27,966
A lot of those center console style boats have the fuel tank under the CC. Look for a pink wire running from the fuel gauge down into the deck under the CC. Pink is usually used for the sender wiring.
 

mike_i

Ensign
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Jun 28, 2017
Messages
947
I agree with the other guys. On my center console the tank is under the bench seat, very easy to access.
 

mitch_houser

Cadet
Joined
Aug 26, 2011
Messages
25
Thanks a lot guys we are going to have couple warmer days coming up soon.Not sure what the screws are holding onto with the seat I don’t want to take them out then they don’t grab when reinstalling.So I really didn’t want to take stuff apart I’ve got 3 battery’s under center console there might be a hatch under my 2 trolling batteries not sure would love for it to be there and fix this thing.
 

airshot

Vice Admiral
Joined
Jul 22, 2008
Messages
5,192
If your screws don't grab the second time around, go to the next bigger screw size. Or coat the threads with a caulk or sealant like goop. Run the screws in but not tight, until the sealant sets up, then snug them down.
 

mitch_houser

Cadet
Joined
Aug 26, 2011
Messages
25
I’m going to pull those batteries out of the way tomorrow see if there is a hatch under them and look for the pink wire there not that expensive think I’ll pull it out just put one in if that dosnt fix it I’ll dig into no power going to gauge (bad gauge) or whatever it is it will be fixed before we take it back out again
 

Chris1956

Supreme Mariner
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Mar 25, 2004
Messages
27,966
If you have an ohmmeter you can check the sender, w/o seeing it. Disconnect the pink wire from the gauge. The pink wire should have some resistance to ground, say between 30 and 250 ohms, if it is good and connected properly.

However, I find that the senders are the first to go. The last one I had to change, had a break in the sender coil, causing it to be open.
 

airshot

Vice Admiral
Joined
Jul 22, 2008
Messages
5,192
If you have an ohmmeter you can check the sender, w/o seeing it. Disconnect the pink wire from the gauge. The pink wire should have some resistance to ground, say between 30 and 250 ohms, if it is good and connected properly.

However, I find that the senders are the first to go. The last one I had to change, had a break in the sender coil, causing it to be open.
Good to know, My last two built-in tanks had stopped working at some point and after cleaning and retightening the connections, they started working again. Did not know there were parts to go bad other than a float ! Another old dog learns something new....
 
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