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hmeislin

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"I have a 99 7.4L with Bravo 3

"I have a 99 7.4L with Bravo 3 outdrive. when I plane the boat, my engine alarm goes off. Water temperature is fine, oil pressure is fine, gear oil reservoir is full. If I stay slow, less than 2500 RPM, the alarm never goes off. I've pulled each sensor wire and that is not the cause. any suggestions??"
 
"Is it MPI?
Could be your low

"Is it MPI?
Could be your low seawater pressure sensor.
This may mean your belt driven pump needs service, or your seawater pickup or strainer is plugging off. You should check all these items.

Rod"
 
"It is an MPI

I am not awar

"It is an MPI

I am not aware that an audible alarm will sound with low seawater pressure. The impeller was replaced a year ago, the water temperature is running normal so it is unlikely that too little water is getting through.

I appreciate any other thoughts?"
 
"How do you know the water pre

"How do you know the water pressure is adequate at higher rpm's?
If you have a partial blckage somewhere the pressure could be low, even though currently you are geting enough water to keep it cool.

If OK, then I guess you will need to have your codes read to see what it does not like.

Just my thoughts.
Rod"
 
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