Overheating

Caint seem to firgure this out? 150 ox66 fuel injection alarm going on at high rpms tryed replacing water pump,thermostats and popit valve only have 200 hrs.

[boats.net]

If you have Yamaha gauges it should light either low oil or overheat warning light to help determine problem. Check the oil level on engine oil, if it gets below bottom line on tank it will sound an alarm.

overheating

Found what the problem was after pulling off heads water jackets were packed up