Lazy Daze Owners' Group

We were finally bitten by lack of preventative maintenance on the generator in our 2011 27 RB. Lack of running it regularly while it sat for 6+ months in our pole barn resulted in expected ethanol related gremlins in the carb. On our trip south this year, the generator started surging pretty dramatically.

Having used highly concentrated gas/Seafoam mix with good success on outboards and other small engines, I picked up a can at Napa along with some 1/4" fuel line for a flushing setup. I came to find out, it's not as simple as running a line from a fuel can to the carb - something many of you are probably aware of. The fuel line leading into the carb from the coach tank is pressurized from a fuel pump somewhere. So, when I tried to tap into the carb with this existing fuel line dangling free - fuel spurted out as the engine was turned over. Since I've no real desire to climb under the RV and swap fuel lines somewhere behind the fuel pump, I'm considering another setup.

The thought is to place a 3-way valve in the fuel line just prior to the carb. Something like this:

Amazon.com : The ROP Shop Fuel Gas SHUTOFF Switch Valve 1/4" 2 Way Toro...

Position 1 would work as it currently does - fuel feeding from the main engine tank and through the existing fuel pump.

Position 2 (off, no flow) would allow the generator to be run dry, helping to avoid problems w/ethanol fuel remaining stagnant in the carb.

Position 3 would allow hooking up a flushing/storage fuel supply, either ethanol free fuel or a concentrated Seafoam mix.

The above will work if the following are true - which is where I could use answers from those in the know.

- If the fuel line is blocked from the main tank, as would be the case when the valve is off or feeding from the alternative fuel supply, will that harm the fuel pump? My guess is no, as it likely encounters that when the float bowl is full anyway. I'm guessing the pump is pressure sensitive, and shuts off when it can't pump?

- For the flushing setup, would keeping the fuel can above the carb be adequate allowing a gravity feed? I'd likely incorporate a fuel bulb to pump it to start, but I'm guessing the only reason a fuel pump exists is due to the generator carb being higher than the coach's fuel tank?

Appreciate any feedback - thanks!

The thought is to place a 3-way valve in the fuel line just prior to the carb. Something like this:
Amazon.com : The ROP Shop Fuel Gas SHUTOFF Switch Valve 1/4" 2 Way Toro...

- If the fuel line is blocked from the main tank, as would be the case when the valve is off or feeding from the alternative fuel supply, will that harm the fuel pump? My guess is no, as it likely encounters that when the float bowl is full anyway. I'm guessing the pump is pressure sensitive, and shuts off when it can't pump?

- For the flushing setup, would keeping the fuel can above the carb be adequate allowing a gravity feed? I'd likely incorporate a fuel bulb to pump it to start, but I'm guessing the only reason a fuel pump exists is due to the generator carb being higher than the coach's fuel tank?