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Portable petrol tanks?

voya12m All Messages By This Member #6900 Hi all, does anyone have any experience using portable petrol (gasoline) tanks for the outboards on their cat? The regulations are very strict for a permanent tank mounted below deck, so that would be good to avoid. ?But if you use portable (20 liter or 5 gallon) tanks don’t you have to keep switching them out at sea because you can use 5 gal rather quickly? Perhaps someone has used a Y valve attached to two different portable tanks?? I am building a 12 m Voyager, with two outboards in the 9.9 - 25 hp range. I want to be able to cross oceans, and carrying some extra jerry cans of petrol is fine. My question is about what kind of tank and size to use that will actually fuel the outboard.? Cheers Patrick
Alweereengijp All Messages By This Member #6902 开云体育 Good plan and no problem. Just store them in them in fresh air and out of direct sunlight. Two 9.9 Yamaha workhorses will be plenty. On crossings you only use them if there is no wind. Then only one engine running for a speed of 5 knots. Will not even use a gallon/hour. Keep it simple and two completely separated systems for max redundancy. You have all the time to switch and fill a tank under no wind conditions. toggle quoted message Show quoted text Op 22 nov. 2017 om 20:49 heeft voya12m@... [k-designs] <k-designs@...> het volgende geschreven: ? Hi all, does anyone have any experience using portable petrol (gasoline) tanks for the outboards on their cat? The regulations are very strict for a permanent tank mounted below deck, so that would be good to avoid. ?But if you use portable (20 liter or 5 gallon) tanks don’t you have to keep switching them out at sea because you can use 5 gal rather quickly? Perhaps someone has used a Y valve attached to two different portable tanks?? I am building a 12 m Voyager, with two outboards in the 9.9 - 25 hp range. I want to be able to cross oceans, and carrying some extra jerry cans of petrol is fine. My question is about what kind of tank and size to use that will actually fuel the outboard.? Cheers Patrick
andrewklees All Messages By This Member #6906 Hi Patrick. Yep theres no problem there. As previously stated, separate system for each motor and tanks in well ventilated area are the go. On my single outboard set up, I use 2 x 45l tanks plumbed into 1 fuel/ water separating filter. The filter has 2 inlet ports in it and I put a small ball valve in each port to select one or both tanks. Works well and did not cost much. There is a large selection "portable" fuel tanks out there. I personally would install the biggest ? ones that will fit in the space you have. After all you don't have to have them full all the time if weight is a problem. As for size, you might want to do some calculations in relation to fuel load and intended usage, before you get too carried away. The down side of petrol outboard motors in relation to diesel motors, is they can be thirsty. My 25hp high thrust yamaha gives 6.5 - 7 kts in calm conditions @ about 3.5 - 4l hour (1/3 - 1/2 throttle) in the Kd860. I think it uses about 9l hour @ full throttle. Does not sound like much, but if theres no wind and you have a long way to go, it soon ads up. Cheers..Andrew.
Bernd Kohler All Messages By This Member #6904 Separate the aft part of the cockpit benches and store there the petrol tanks. For good ventilation drill big holes in the bridge deck.? Bernd
Paul T. Howard #6908 I have a 37foot cat with lifting outboard(s) and have made ocean passages. The tanks do require occasional changing and re-filling at sea that I try to do in calm conditions and try to only motor in calms with the outboard(s) up when it is rough. I put a gerry can on the cockpit seat above the portable tank and use a siphon hose to fill the portable tank at sea.? The siphon hose unit I have has a copper fitting with a marble inside at one end with a 6foot x 1/2" diameter hose attached.? To start the siphon the marble end of the hose is put to the bottom of the full gerry can and jiggled up and down a few times to start the siphon and lifted out of the gerry can when I want to stop the siphon.? There is no spillage unless you allow the tank to overfill. I carry a couple of these units, one for water and one for fuel, as they are light and only cost $10-15.00 each. They are variously called: Shaker Siphon;, Moeller Siphon Pump; EZ .5" x 6" siphon hose; Shoreline Marine Easy Shake Siphon Hose, etc. Available at Canadian Tire, Walmart, etc. I have been using these for fifteen years and the only maintenance is to change the hose every five years or so as the fuel eventually hardens the hose. I wouldn't go cruising without them. Paul Howard
voya12m All Messages By This Member #6913 ?Thanks for the replies - clear, practical, and encouraging. Bernd, I was previously thinking of putting the tanks under the aft steps, but then I would have to climb out of the cockpit every time to refill. So there is a good fit in the aft end of each cockpit bench for a 12 gal (45 L) portable tank. That should give us 24 hours of slow motoring in calm conditions (one motor at a time). And more fuel in portable cans as needed.? Cheers Patrick?

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