My bet would be on a bad ground wire somewhere.
Definately electrical; look for corroded contacts or frayed wires.


On Sun, 10 Jun 2007 12:55:28 -0700, wrote:

I have a 2000 454 mercruiser with 200 hrs.
Each year I've noticed the alarm would sound and the engine would
temporarily lose power as soon as I hit the trim switch.(On plane
3000rpm) This seems to only occur once or twice a year.
The guages all read normal and all fluids are normal. Any Ideas?