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Bertram31.com General Bulletin Board
ISSPRO Fuel Sender
Posted By: Sean Burlingham In Response To: Re: Fuel pickup/nonskid (Capt Patrick McCrary)
Date: Monday, 6 March 2006, at 11:23 a.m.
I have a question on the information from this old thread.
On my B33 I removed the old tank sender (I believe it is original/factory-installed) and it was 20" long. An old post from Bruce allowed me to diagnose my problem as a bad sending unit (thanks Bruce).
Question is, the tank measures 25-1/2" in depth, and the sending unit is about at the lateral centerline of the tank. I can't see the shape of the bottom of the tank because of bulkheads surrounding it.
I'm wondering if maybe there isn't much fuel in the bottom 5" of the tank, due to the v-bottom shape of the hull that (maybe) the tank shape follows, and so perhaps Bertram put in a shorter sensor on purpose so as not to give a false reading on the gauge. If the above is correct, then say if there is only 10 gallons of fuel in the bottom 5" of the tank, a reading of 1/4 on a 25" sending unit would really mean you were effectively empty.
I'm thinking that I'll order a 22" long sending unit, and watch carefully what fuel I use and gauge readings to try to calibrate the thing.
Any thoughts? Or does anybody know what the shape of the bottom of the tank is on a B33? I'm going to call Bertram and ask them that question, but I haven't had too much luck with them in the past with things like this
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