Yamaha 2000 extended run fuel tank

[Welder99]

Hello all. I picked up a pair of used Yamaha 2000 generators like new. They came with the hook up to run both generators together. I would like to make an extended run fuel system to run off a 6 gal Boat tank gravity feed. I've read on line the generators don't have a fuel pump like the Hondas do so that's why I plan on using gravity feed. Has anyone here ever built system like this and can give me any pointers. I know there is a company that sells the fuel pump add on but I don't care to go that route. Any information would be very helpful. Thanks in advance.

[GordonThree]

Welder99 wrote:
Thanks GordonThree, I figured that would be the best way to go. I seen a few YouTube post showing how to do. There's one company has a kit for $250.00 for the parts which as far as I'm concerned is pretty pricey since I looked up the parts can be bought under $100.00. I seen some say as far as a fuel run on a basic fuel run with AC running would be some where around 6 hours generator tank only with no extended run fuel tank. Thanks again for the information.

Post back if you make the modifications, I might get inspired 🙂

[Welder99]

Thanks GordonThree, I figured that would be the best way to go. I seen a few YouTube post showing how to do. There's one company has a kit for $250.00 for the parts which as far as I'm concerned is pretty pricey since I looked up the parts can be bought under $100.00. I seen some say as far as a fuel run on a basic fuel run with AC running would be some where around 6 hours generator tank only with no extended run fuel tank. Thanks again for the information.

[GordonThree]

forgot to post this link last time

Vacuum Fuel Pump


Amazon Image

[GordonThree]

The best solution I've see is, install a fuel pump. It's a cheap part on Amazon, and good instructions on youtube.

I've tried gravity feed for my twin 2000's, with varying degree of success.

If you look at the system, you have the small on board tank that gravity feeds the carb, and you're trying to use a siphon to fill that small tank with a larger one.

1st time, the siphon kept breaking and no fuel would flow. This was due to air in the small tank.

2nd time, I filled the small tank TO THE BRIM, put on the special siphon cap, and then primed the big tank. This worked, but had me nervous.

3rd time I tried the same, but the siphon ended up finding the smallest leak in the special cap, and gas everywhere. The gasket those special caps come with is a very stiff rubber, and I don't think it's compatible with gasoline. After I let all the gas evaporate, the cap had glued itself onto the generator and needed a wrench to take off. Luckily it had not damaged the generator's tank.

That was years ago. I've found that I don't really need "extended run" to feed my habits. If I'm camping when it's hot enough to need lots of air-con, I camp at a state park with electric. I can get about six hours out of the on board tanks running my air-con.

If I ever get inspired to try again, I will do the fuel pump modification - now that my twins are out of warranty.