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Old 04 January 2014, 10:28   #1
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Country: UK - England
Town: London/North Yorks.
Make: Honwave T40AE
Length: 4m +
Engine: Mariner 15hp 2s
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Hi Guys..
have read the forum for quite a while but don't post often..
I would like some advice on which size fuel tank I need..
my outboard is a late 90's 2s Mariner on a 4m Honwave..
I haven't used the engine enough to know what sort of consumption I can get from it yet..
the usual use for the boat is weekend fishing.. day and overnight.. and some playtime of course!!
no particular area .. I vary from Plymouth to Scarborough coastline wise
I have a 30l hulk tank which came with the engine.. but am thinking I won't ever use as much on a weekend..
I'm more than happy to carry a smaller tank and have a spare fuel container either onboard or ashore..
or is it simply the case I'm showing my inexperience by not being happy with what I've got..
it's just I am always aware.. size isn't everything!! :0#
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Old 04 January 2014, 10:39   #2
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Hp size of your engine would be usefull ; )
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Old 04 January 2014, 10:46   #3
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damn it... there was me trying to think of everything..
except the obvious!! :0#
it's a 15hp..
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Old 04 January 2014, 11:55   #4
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That's a big tank for a small motor. IIWY I would hold on to the hulk and test your consumption. Put in a known volume and keep a note of your hours run and distance covered. This might seem a bit loose, but I've found that it gives a VERY good indication of what your ongoing consumption will be as it takes your rig and driving style into account. After you know that, you'll be well placed to decide how you want to proceed. You might find that a pair of 12l tanks work well for you for lots of reasons...
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Old 04 January 2014, 12:07   #5
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Fuel

Hi there. I have a 3.5 honwave with a 15 hp four stroke and I carry a 25 litre fuel tank. I fill it before every bass fishing trip, cover lots of miles in 10 hour days and mostly at full chat and have never used much more than half a tank. Hope this helps
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Old 04 January 2014, 14:20   #6
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I have a 40HP and carry 26 liters or so as it is a 6.6 gallon tank. Only once I have ever wished I had more gas, and fortunately I did in a spare tank. I ran out right in front of the Coast Guard station as I was pulling back up to the boat ramp.

Realistically you could cut that amount of fuel in half, unless you are doing big trips.
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Old 04 January 2014, 16:34   #7
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Country: UK - England
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much appreciate your answers guys..
I think this season as suggested by willk I'll stick with the tank I have..
as said it will give me a chance to see what sort of fuel use I average out at.. and at least I know I won't run out!!
and let's me take my time on that well know auction site to nab a couple of cheap 12l tanks as suggested by PeterC..
by the sounds of it from Johnny 12l is enough plus a spare will be my best bet in the long run..
I did think the tank was far bigger than I'd need.. but it came free..
and at last I have been proved right!!.. as I've always had to tell the girls I've met.. size isn't always important :0$
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Old 08 January 2014, 18:14   #8
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On a 2 strokes engine expect a 12% fuel consumption of its HP at wot on flat waters. Example a 18 HP consumes 2.2 Gal/hour at wot, much less at 1/2 to 3/4 throttle.

Happy Boating
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Old 25 January 2014, 15:56   #9
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With 15hp and at WOT I'd expect usage at 5 litres+ an hour.

Calculate 1/3 there, 1/3 back and 1/3 reserve.

How far do you go?
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Old 25 January 2014, 16:00   #10
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You can never carry too much fuel, but can always carry too little. 30 Litres will last all weekend!
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