The bottom of our tank is not flat, it slopes downhill a bit toward the pickup tube at the front so boat trim would have to change a lot to affect this (on our 37/40).
I can confirm I have put up to 44 US Gallons in our tank when it was completely empty. On your tank, does your pickup tube end far short of the bottom somehow? Ours is quite close to the bottom so we depend on the Racor to separate the crap and water out that would be left on the bottom of the tank by a shorter pickup tube. Ken H. On Wed, 30 Oct 2019 at 16:10, Josh Muckley via CnC-List < cnc-list@cnc-list.com> wrote: > The pickup tube is near the forward part of the tank. Have you done > anything to change the pitch of the boat? If you removed bow weight or > added stern weight or both, this could change the pitch such that fuel > collects further from the pickup tube. > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > > > > > On Wed, Oct 30, 2019, 2:47 PM Tom Buscaglia via CnC-List < > cnc-list@cnc-list.com> wrote: > >> I have a puzzle. I was on my way to fill up last trip out for a nice >> weekend rendezvous with out club when I ran out of fuel. Fortunately, I >> was close enough to our club in the inner harbor. I dropped the dinghy and >> ran to shore to get a gerry can of diesel. When I finally got to the gas >> dock in Tacoma she only took 24.5 G of diesel. I made sure that the filler >> tube was open and even intentionally overfilled it to make sure the vent >> was clear (than god for my catch can!) I made sure the tank was topped off. >> >> I have never trusted by gauge as it would show empty when there was 1/2 a >> tank left. I used to chart all time and distance religiously in my old >> boat and did the same on Alera initially. Then I realized that unlike out >> old 35 MK1 Alera had a functioning Hobbes meter. So over the last few >> seasons I got lax and instead of copious logging I just take a picture of >> the Hobbes meter at every fill up. Made sense and eliminated the problem >> of accounting for sailing time on long runs. Based on the Hobbes meter >> reading from the last fill up the engine ran 26 hrs. Very consistent with >> my established burn rate of 0.9 GpHr. >> >> I started to suspect that maybe the PO had replaced the original 40G tank >> with a smaller one. However, when I checked my log book I have had several >> occasions where the fill up was more than30G.. Not many, but more than one >> or two over the 25G mark. >> >> The rancor is clean and aside from need to bleed the system down to the >> injectors to get her started after the stall out, no air leaks in the fuel >> system. Motoring in flat seas, so sloshing fuel is not it either. >> >> Have at it C&C sleuths...I am at a loss. >> >> >> Tom B >> >> .¤º°`°º¤,¸¸,¤º°`°º¤¤º°`°º¤,¸¸,¤º°`°º¤. >> Tom & Lynn Buscaglia >> SV Alera >> C&C 37+/40 >> Vashon Island WA >> (206) 463-9200 >> www.sv-alera.com >> >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> > On Wed, Oct 30, 2019, 2:47 PM Tom Buscaglia via CnC-List < > cnc-list@cnc-list.com> wrote: > >> I have a puzzle. I was on my way to fill up last trip out for a nice >> weekend rendezvous with out club when I ran out of fuel. Fortunately, I >> was close enough to our club in the inner harbor. I dropped the dinghy and >> ran to shore to get a gerry can of diesel. When I finally got to the gas >> dock in Tacoma she only took 24.5 G of diesel. I made sure that the filler >> tube was open and even intentionally overfilled it to make sure the vent >> was clear (than god for my catch can!) I made sure the tank was topped off. >> >> I have never trusted by gauge as it would show empty when there was 1/2 a >> tank left. I used to chart all time and distance religiously in my old >> boat and did the same on Alera initially. Then I realized that unlike out >> old 35 MK1 Alera had a functioning Hobbes meter. So over the last few >> seasons I got lax and instead of copious logging I just take a picture of >> the Hobbes meter at every fill up. Made sense and eliminated the problem >> of accounting for sailing time on long runs. Based on the Hobbes meter >> reading from the last fill up the engine ran 26 hrs. Very consistent with >> my established burn rate of 0.9 GpHr. >> >> I started to suspect that maybe the PO had replaced the original 40G tank >> with a smaller one. However, when I checked my log book I have had several >> occasions where the fill up was more than30G.. Not many, but more than one >> or two over the 25G mark. >> >> The rancor is clean and aside from need to bleed the system down to the >> injectors to get her started after the stall out, no air leaks in the fuel >> system. Motoring in flat seas, so sloshing fuel is not it either. >> >> Have at it C&C sleuths...I am at a loss. >> >> >> Tom B >> >> .¤º°`°º¤,¸¸,¤º°`°º¤¤º°`°º¤,¸¸,¤º°`°º¤. >> Tom & Lynn Buscaglia >> SV Alera >> C&C 37+/40 >> Vashon Island WA >> (206) 463-9200 >> www.sv-alera.com >> >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
