Originally Posted by GaryRudolph
I can fill it to about 75% full on level ground before the vent house starts leaking (I also rerouted the vent hose as high as I could go). I end up with a 2/3 full tank by the time I get to a camp spot.
I've seen it say 1/3, but that's usually because it's not level. Our tanks are so wide that it's hard for those gauges to be accurate. A 1 degree tilt throws it off a lot.
You might try talking to your local dealer's service department to see if they'll tell you about others with the problem. I have a 2012 XLR 300X10 and my dealer told me that they've had 4 of the newer XLRs with siphoning problems. I know thats what mine was doing because once it started running I'd be like....what the heck? cuz the water would keep coming out.
They're supposed to tell me what they did to fix it on Friday when I go pick it up. I wanted to see up in there but they didn't call me to give me a heads up that it was going in and mine has enclosed underbelly. I'll post up what they say if I don't forget. PM me if you are interested and haven't seen something.
It seems that pinching the drain hose once you're full would work.
Does your hose stick way down into the tank or can you tell? It must extend to the 1/3 level or it would stop siphoning higher up. Can you pull it out any?
Just some ideas.