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Permanent Fuel Tank
I bought a 23 gal. tank from overstock.com for $140. It was made by Moeller and used on Lund boats. In 2011, boat manufacturers were required to install low permeable tanks when they ran out of their older stock. Low permeable tanks have a black nylon lining (as can be seen here). There are still a lot of older style permiable tanks being sold even though they are new old stock and unused. BoatUS did an experiment where they found that an old style 6 gallon plastic outboard tank lost almost a pint in 6 months. That's why gas goes bad.

To the left of the helm I'm putting in a regular fuel gauge connected to the tank sender. The fuel management system recommended still having a regular gauge. I have marked out the center of the hole for the gauge. Now I need to find my 2" hole saw again.

2400 rpm gives a SOG of 6.2 knots at .7 gallons per hour (supposedly 10 mpg, although I usually only get 8). At WOT I have seen it go as high as 3.6 gph.
Yes, I'm only in 5.3 feet of water, but I'm heading out of the little bay right in front of my cabin. It's cool.

Here is the interplay between my tach, my fuel management system, and my plotter. 700 rpm gives 2.4 knts at .0 gallons per hour. That is because my fuel management system doesn't give accurate rates at less than .1. It does keep an accurate account of overall usage at this rpm.

The fuel line goes down the starboard side and the fuel filter is now up off the deck under the splash well. You can just barely see the fuel management sending unit to the left and above the filter. I left a standard outboard line and bulb so that I can still use my Yamaha 12 gallon tanks. Total fuel would be 35 gallons for a range of +200 miles.

To the left of the helm I'm putting in a regular fuel gauge connected to the tank sender. The fuel management system recommended still having a regular gauge. I have marked out the center of the hole for the gauge. Now I need to find my 2" hole saw again.

So the radio got moved to a shelf above the window, a position I prefer. I noticed when moving the radio that the compass, which was on the same plane as the radio, shifted more than 10 degrees.

Here is the fuel management system gauge installed. Directions said to keep it at least 20" from the radio. I don't know which interferes with which, but it meant moving the radio.

And then I found this on Ebay. No longer made, it is a fuel management system that measures fuel usage per hour, total fuel usage, and has an adjustable low fuel alarm based on fuel usage. It is supposed to be accurate within about 1 liter on my 90 liter tank.

M

To the left of the helm I'm putting in a regular fuel gauge connected to the tank sender. The fuel management system recommended still having a regular gauge. I have marked out the center of the hole for the gauge. Now I need to find my 2" hole saw again.

Marco Flamingo
Jan 19, 2016

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