I have a 2005, 25 hp that hasn't been used for about two years. When I started it, it runs but I need to keep the choke on about halfway, or it stalls. If I keep it partially choked, it runs fine. This tells me that perhaps it's got an air leak somewhere else? There is no gasket where the carb attached to the block, which seems strange. I put new plugs in and new gas, flushed all the lines. One thing I notice is that the fuel filter housing is not full of gas while it's running. Anyway, I live in the middle of nowhere so I'm hoping maybe one if the SB experts could come up with a simple explanation. Pescador? Where are you, amigo?