Interesting... The 895cc Vanguard is about 31 HP. When running on Propane, the HP drops to around 30. I almost purchased the 32 HP gasoline for this reason, but only have a small area where the bahia is so thick that I have to slow down a bit to prevent bogging. I was sold on the propane due to the lack of fuel related problems. As far as pulling from both tanks, I don't see anything in the lines that prevent this and I haven't had any issues in doing so. I'll give it a closer look tomorrow.