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    Bad sensor?

    I have now experienced the following twice almost exactly the same to the minute. 2011 5.7 horizon MPI inboard, 135hrs. Runs perfect for approximately 1hr cruising about 2100rpm. At the 1hr mark the guardian kicks in and the alarm goes off steady. I take the throttle down to idle and pop it out...
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    Battery bank bonding

    I recently purchased a boat with a bow thruster. It is powered by a completely isolated bank of 2 six volt batteries. No other loads. Do you think I should bond the negative side to the negative side of the bank of house batteries? It seems like if the banks are not bonded at negative there...
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    Mercruiser 350 mag MIE ECM

    Boat died today after running for two hours. I was running about 2800 went to throttle down and it just throttled down to dead. Turns over but no spark. Power is good to coil and ignition module. Also swapped out with a known working coil and module. Distributer turns and cap/rotor were ok. A...
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