Thought I had the problem fixed earlier with installation of new water pump & t-stat. After operating @ 32-33 MPH for 45 - 60 seconds, the buzzer sounds and won't silence until motor is stopped & re-started. With the motor ideling afterwards, I'm able keep my hand in the stream from the tell-tale for about 30 seconds. The buzzer does not sound @ turn of key when starting. In fact I never realized I had a buzzer until I replaced the Power Pack on # 3 cylinder and when I took it out to test run after installation is when the buzzer began to sound which led me to replace the water pump & t-stat. The water temp in the river is about 83 Degrees. Any suggestions are appreciated .