The gearbox is fine. This started happening all of a sudden - I turned off the engine to pick up a skier, then upon restarting (difficult), the engine idled erratically, then shut down upon placing it in gear. Now a weird thing about this is that we pulled the boat out of the water and with ears on it, the motor started and ran fine. We put it in gear and it instantly rev'd to full throttle when called for. . . We placed it back in the water and it ran for maybe 15 minutes, then the same thing. Carbs were rebuilt less than a year ago. Plenty of fuel appears to be getting to the carbs. Pumping the bulb does not appear to help. Ignition module was replaced about 18 months ago. What else could it be? Thanks!