Halon system

Discussion in 'Gas Engines/Drives/Transmissions/Props' started by Luis, Dec 13, 2020.

  1. fwebster

    fwebster Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 6, 2006
    Middle Tennessee ; Panama City Beach, FL
    1996 450DA
    3116 Caterpillars
    The switch will just by pass the fire extinguisher system, it won't fix the problem. Your boat is 25 years old and is at the age where the Halon bottle may have leaked down.
    Luis likes this.
  2. Arminius

    Arminius Active Member

    Oct 30, 2019
    Bowrider 200 Select, 2003
    5.0L MPI, 260 hp w/Alpha 1 Drive
    The gauges I have seen have toggle switches on the front covered by a black rubber weatherproofing membrane. just push the bump. Or, use a lightweight jumper wire from a grounded surface to the wire on the bottle's screw-in sensor. Must be grounded for your engine to run but sensor stops grounding when pressure falls. This gas pressure is very temperature sensitive so it will become erratic towards the end.
    Luis likes this.
  3. Pirate Lady

    Pirate Lady Well-Known Member

    Jun 2, 2020
    Chesapeake, Middle River
    91 250 Sundancer, gorgeous, no you can’t buy it.
    454 Bravo 1.
    Try David Mearson, Old Line Marine. located in Pasadena but they travel.
    Office - 410-402-1096 Cell - 443-418-4408
    You are prolly going to wait a while at this time of year.
    Luis likes this.
  4. Arminius

    Arminius Active Member

    Oct 30, 2019
    Bowrider 200 Select, 2003
    5.0L MPI, 260 hp w/Alpha 1 Drive
    If your problem is the halon shutdown system, both engines should be inoperative. When the ground through the bottle is lost, both ignition leads are disconnected by separate relays in the shutdown box. You can bypass by putting both ignition leads on the same screw. Here's a picture of a box and a gauge. I agree that it would be best to have some help on this. This stuff is built to be bullet proof so loose wires are much likelier than bad components. https://www.fireboy-xintex.com/wp-content/uploads/2014/07/Engine-Shutdown-18005-ES-ELS.pdf
    Luis likes this.
  5. hughespat57

    hughespat57 Active Member

    Sep 25, 2016
    Rock Hill, SC
    300 Sundancer 1994, trailered tri-axle LoadRite roller
    Mercruiser 5.7 260HP Alpha One Gen II, twin
    hope you already solved this but as before, it is likely electrical not the fire bottle itself.

    Not every boat had the full engine shutdown automated system. Many only had the basic horn and light.
    When the horn went off you shut down the engines they did not shutdown on there own

    If you have the full fire control system and the bottle discharges the system will shut down both engines and both blowers.
    And the bypass switch will allow restart. Which you noted you cant locate, likely because you don't have the full system.

    Since the port side starts this is not likely the problem.

    Just ignore the fire bottle for now and focus on normal engine no start issues.
    Does it have spark?
    Does it have 12 volt at the coil?
    Does it have fuel?
    Luis likes this.
  6. Luis

    Luis New Member

    Nov 2, 2020
    Baltimore, MD
    1996 330 Sundance
    Twin mercruiser
    Hi again…here is the update, but first let me just thank you all for the advice.
    “Hughespat57” definitely knows his stuff.
    After having the mechanic take a look at the issue, here is the short version:
    1. The halon system had nothing to do with it.
    2. The alarm was the horn and light alarm which triggers for an engine malfunction. It happens to light up the light labeled as the halon system alarm.
    3. The issue was a belt which needs replacement.

    Once again, thanks so much everyone, and I hope that if this happens to anyone, maybe this info may help.
    hughespat57 likes this.

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