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Lost Comm. with Engine fault caused by fire extinguisher-gctid824651

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    Lost Comm. with Engine fault caused by fire extinguisher-gctid824651

    I recently had to remove my engine to replace the coupler for the B3 drive. We had to remove the batteries and the fire extinguisher in the engine compartment. After we put the engine and the batteries back, made all the connections we did not install the fire extinguisher in the engine compartment as it needed to be refilled. We then tried to start to engine but nothing about the engine seemed to work. The Smart Craft gauges on the dashboard kept on flashing "Lost Comm. with Engine" alarm and the engine did not crank. At some point we guessed and connected the fire extinguisher and, vila, all started to work. It seems that the electrical connection to the automatic fie extinguisher in the engine compartment is in series with the engine communications and if that connection is broken, so is the engine communications.

    May be others knew about this but I certainly did not. I didn't even read about it any where.

    Just be aware,
    Retired, computer expert / executive
    Bayliner 285 Cruiser / Mercruiser QSD 4.2L 320 HP Diesel
    Live in the Bay Area, CA, USA, boat in Turkey
    D-Marin @ Turgutreis in Bodrum/Turkey
    [email protected]
    [email protected]

    #2
    Good to know.

    Also, don't forget to remove the safety pin, if any, from the fire bottle after you install it. In my years of doing Vessel Safety checks I've come across 2 boats that still had the safety pin installed on the bottle. In both cases manual actuation would not have been possible.
    1999 3788, Cummins 270 "Freedom"
    2013 Boston Whaler 130 SS
    Anacortes, WA

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