alarm on 90 hp 2 stroke

[hudsoncrk]

Last weekend when I went full throttle on my 2004 90 hp mercury 2 stroke saltwater engine, after about 10 seconds a steady high pitched alarm went off which stopped when I throttled back to 3/4 throttle. I checked the oil tank and flow, full and flowing fine, water flow from cooling system was the same as usual, any idea what is causing the alarm to go off?

Joe

[RobD]

might be a thermostate problem,

[JUST-IN-TIME]

sounds like poppet valve and or

water pump
water pump housing
thermostats