I have a 1987 Johnson 50 hp VRO that will run good at full throttle for about 15 mintutes, and then the warning buzzer goes off and then the engine dies. I mixed 50:1 in the tank to make sure I'm not overheating the engine, but it still happens. Plenty of water coming out too. Any ideas? I read a lot about converting from VRO to pre-mix. Maybe I should try that? <br /><br />John
