Ok... Let's do a little diagnostic test. 07 Howard Sportdeck with a 600sci. Last weekend we took the boat out and when the boat was under load and going over 4500 rpm the engine cut out intermittently. An alarm also sounded giving a three beeps then repeated. One time it cut out when I was coming out of the hole moderately aggressive. I checked the temperature, oil pressure, drive fluid etc. all looked perfect. When starting the engine it seemed a little slower to fire than normal. After it started it idled smooth and ran fine until it was under load and then had the bad miss. Aaron from Absolute Speed and Marine is picking up the boat tomorrow to take it in and have a look. What do you think is wrong?
water pressure related?
fuel supply problem?
The boat has been maintained well and has new plugs, impeller, all fluids changed etc recently. 50 hours on boat and motor.