Constant alarm above 4000RPM

laureniac1laureniac1 Member Posts: 253 ✭✭✭
Last year I got a constant alarm the day before I put the boat away I was running just a little over 4000RPM. My 2005 270 went into “guardian” mode and engine automatically throttled down to 1800RPM. Mechanic pulled code this year before I launched and said it was low voltage so we replaced both batteries. Of course went out yesterday boat was running great for about 10 mind and the alarm started again. Boat went back into guardian mode. Called mechanic back he said he will put it back on computer. Any thoughts? Thanks 

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