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-   -   1994 Prostar sending unit (http://www.mastercraft.com/teamtalk/showthread.php?t=51746)

jude09 11-20-2012 01:52 PM

1994 Prostar sending unit
 
My feul gauge always reads 1/2 full. I assume it is the sending unit. Do I need to revome the fuel tank to replace the sending unit. It doesn't seem to have enough head clearance to remove unit.

mikeg205 11-20-2012 02:22 PM

Yes you have to remove it...you can buy sending units directly from http://www.isspro.com/

Double D 11-20-2012 02:40 PM

Getting them dialed in is another thing.... :rolleyes:

Jorski 11-22-2012 02:04 PM

Jude09,

If the problem were electrical, you would either read all the way empty or all of the way full all of the time.

I had this exact problem. The float that makes your unit work is in a tube. It has magnets on it that the electrical part of the sending unit reads and then send the information to your guage.

In my case, the foam ball, was sort of swollen from years of immersion. Likely yours is also. It could also be stuck due gum or varnish from the gas. The solution is to remove the unit, take the end cap off of the tube and pull out the foam ball.

Be careful, you don't want to knock the magnets off. I also shaved down the ball to make it move a little more freely inside of the tube.

This is worth a shot. You have to remove the old one anyhow, and it just might save you a couple of $$$$.

PS You can undo the clips at the bottom of the tank that hold it in place at the bottom. If you undo the breather vent hose at one end, you can pivot the other end of the tank around to get at the sending unit. This way you don't have to remove it completely.

Let us know how it turns out.

AZDave 11-23-2012 02:43 PM

I have gone 7 years with out it, but then I don't have my back seat in place so I can check it easily.

ricford 11-23-2012 06:10 PM

Fixed mine myself last year. I had to epoxy the magnets back into the foam float. I found some 2 part epoxy that was gas resistant at the local marina, but some guys have used super glue. Easy fix, there is a thread on it in the frequently asked questions section.


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