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crusader marine 454

Discussion in 'Technical Discussion' started by David Houshar, Jul 2, 2016.

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  1. David Houshar, Jul 2, 2016
    #1
    David Houshar

    David Houshar New Member

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    not starting, has fuel pressure but, no fuel coming out of the spray jets.
    I can spray gas into the intake and it fires right up.
    looking for a trouble shooting guide
  2. K1W1, Jul 2, 2016
    #2
    K1W1

    K1W1 Senior Member

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    Blocked jets from sitting too long and the fuel in the carb turning to sludge would be a good thought
  3. Capt Ralph, Jul 2, 2016
    #3
    Capt Ralph

    Capt Ralph Senior Member

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    Q-jets or Holly carbs?
    Highly un-likley that there is fuel in the bowl and the accelerator pump(s) (squirters) are not squirting fuel.
    So, How do you know your getting gas?
    Stuck carb floats, stuck fuel pump check valves, leaking filter low side of pump and bad hoses I have witnessed.
  4. David Houshar, Jul 2, 2016
    #4
    David Houshar

    David Houshar New Member

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    I will check that. The fuel is good, both engines run off the same tank. I was thinking the exciter not sending a signal to the jets (throttle body injection)
  5. David Houshar, Jul 2, 2016
    #5
    David Houshar

    David Houshar New Member

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    throttle body injection - no bowl and no floats. checked fuel pressure - 35 psi
  6. Capt Ralph, Jul 2, 2016
    #6
    Capt Ralph

    Capt Ralph Senior Member

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    TBI has to be turned on. more than likely a electrical problem. Look for a crusader relay or breaker usually mounted on the stb riser, opposite riser from the ECM.
    Do you have a manual or schematic?

    Please be careful; Gas and electricity can get exciting, even deadly.
  7. David Houshar, Jul 2, 2016
    #7
    David Houshar

    David Houshar New Member

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    I do not have a manual. I checked the breakers and they have power on both sides. I would swap the jets with the other engine but the wiring doesn't lead to a plug, it goes into the wiring harness and I do not want to cut and splice.
  8. Capt Ralph, Jul 2, 2016
    #8
    Capt Ralph

    Capt Ralph Senior Member

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    There is a relay under that cover. If the other engine is running, swap the relays.
  9. David Houshar, Jul 2, 2016
    #9
    David Houshar

    David Houshar New Member

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    I can do that,does that relay have to do with that fuel delivery
  10. David Houshar, Jul 2, 2016
    #10
    David Houshar

    David Houshar New Member

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    The problem with this engine is fuel delivery
  11. Capt Ralph, Jul 2, 2016
    #11
    Capt Ralph

    Capt Ralph Senior Member

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    This rely turns the ECM options on. This energizes the TBI.
    You may or may not be getting a reliable spark also.

    It's one of those relays that help the engine get a full 12Vdc charge to the options and not have all the current go thru the key switch and all the way back.

    I had to dissect one of these Crusader 454s once and purchased an ECM module. Was lucky when I found that relay was old and not passing the required current. Since then, I have hit the nail on the head on some similar failures.
    It may show 12 Vdc on the output when testing a non running motor, but there is not any current flowing thru the micro contact. When the starter engauges, it's flat lined.

    It will take you a few minutes, but worth the experiment.
    As soon as you get that cover open, make sure the oil fill cap is back on. lil screws, short (real short) wires, tight place for lil fingers.

    The Crusader relay is about $60 and usually has to be ordered.
    I've started installing regular 40 Amp square relays and mounting them out side the cover (with new pig tail socket) and leaving the owners with spares.
  12. Capt Ralph, Jul 2, 2016
    #12
    Capt Ralph

    Capt Ralph Senior Member

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    Or, call in a tech. Remember what I said above; Gas and electricity can get exciting, even deadly.
  13. Capt J, Jul 3, 2016
    #13
    Capt J

    Capt J Senior Member

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    Another thing to check is your key switch. It might not allow everything to get voltage when you're trying to start it. There is also a relay that runs the TBI for a few seconds to put gas in the motor so it fires and I believe AND this might be your issue, they run the fuel pump and possibly TBI to an oil pressure switch so the motor doesn't keep getting gas if you're sitting there with key on and motor not running. BUT, at this point you can piss in the wind for weeks, I'd call a tech out.
  14. David Houshar, Jul 3, 2016
    #14
    David Houshar

    David Houshar New Member

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    I will try that and let you know how that goes. Thanks for all your help