I have a 2001 Baja 232. Is there any an adjustment to the fuel guage which is made by Gaffrig precision enginering?

id like to know too

Mine was reading around half full and I took 60 gals I think the tank holds 89

232 holds 74 gallons

Mine does the same, 30 gallons left to go after it hits the full mark, there is an adjusting screw on the sender I guess, Gonna try it this fall when i winterize

I got to look at the sender yesterday. No adjustment on the outside. I redid all the connections to see if it helps. Tank is full now so I can not pull the sender mechanism to check it for movement etc. I will do that when I am low on gas.

Is there an float arm?? usually they have a float that goes up and down.. like a toilet float.

Possibly bend it?? if show full too soon, then bending it up would work... trial and error method though...

I usually kept my 25ol full and knew how much it would take to fill at 1/4, 1/2.. 3/4 was always crap shoot as it really started to move to 1/2 quickly after I burned close to 1/2 half tank. 33ol has been a challenge.. don't want to carry around 186 gallons of fuel when that would last us 4-5 trips.

Float arm would be inside tank and length of arm should be 1 inch shorter than the depth of your tank if it is aluminum and 1.5 to 2 inches if it is plastic.
With tank near empty I would remove sender completely and check it for proper length and movement. If that does not take care of the problem I may replace sending unit.

One other thought would be to add a resistor to the sender output line . I would have to check with the more electrically intuned boaters to see if that might work