You MUST change the valves which are located under the steps that go to the aft stateroom. the center valve is the crossover that allows the tanks to equilize if you need them. I would suggest leaving that open. However. You must control the flow of fuel from the forward tanks and the aft tanks. I use the forward tanks until they are low then switch to the aft tanks. Then when the aft tanks get about 1/4 i fill all of them up again and switch back to the forward tanks to start over.
Happy motoring. I just sold our beloved MC (1984 46') what a great boat she was for us...and the new owners love her. Kevin martin San Diego On Tue, Mar 20, 2012 at 4:18 AM, Frank Spor <[email protected]>wrote: > Good morning, I'm far from an expert on this, but I too own a 46', 1984 > Uniflite. As far as I can tell....and this is an estimate. 1900 rpm is a > good speed which gives you about 1 gallon per engine per mile. Probably > not exact, but easy numbers to work with. The information on my boat > indicates two, 50 gal tanks in engine space and 400 gallons under the bed > in the captains quarters. > > As far as I can tell there are cross feed valves between tanks. Mine > appear to be open. Like I said I'm no expert so if someone has better > information........ > > Good luck frank > > *From:* Doug <[email protected]> > *To:* [email protected] > *Sent:* Tuesday, March 13, 2012 1:26 PM > *Subject:* [UnifliteWorld] DDA 6-71 fuel efficiency > > I just purchased an '84 46' Uniflite w/ twin 410hp DDA 6-71 diesels. I'm > trying to get a feel for what I might expect with respect to fuel > efficiency. Hence, if anyone with comparable engines could respond with the > following info, I'd be very grateful: > > 1. Your engine's "sweet spot" in terms of engine RPM and related speed. > IOW, at what RPM/speed do you get the best fuel efficiency? > 2. What is your average fuel consumption in gph at this ideal RPM/speed? > 3. If not the same as #1, what RPM/speed do you generally cruise? > 4. What is your fuel efficiency at that RPM/speed? > > For each engine, I'm told this vessel has a 68 gal. tank forward and a 182 > gal tank aft. Do I need to switch between these tanks or is that done > automatically? How? > > Thanks for any and all responses. > > Doug > -- > You received this message because you are subscribed to the Google Groups > "UnifliteWorld" group. > To view this discussion on the web visit > https://groups.google.com/d/msg/unifliteworld/-/joMuFuii3JAJ. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/unifliteworld?hl=en. > > > -- > You received this message because you are subscribed to the Google Groups > "UnifliteWorld" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/unifliteworld?hl=en. > -- You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/unifliteworld?hl=en.
