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  1. 07-15-2020, 08:19 PM #1
    Bruceleonard
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    1991 409 Javelin fuel tank capacity

    I just bought a 91 javelin 409 trying to figure out fuel capacity since my gauge is not working. Also how long roughly should I be able to run on that fuel capacity with a 225 optimax on that boat
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  2. Nightmare
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    #2 07-15-2020, 08:40 PM
    Can't help on fuel cap. On carbed motors, the rule of thumb reference consumption was: Figure 10% of your rated hp and that was how many gallons you would burn per hour at wot i.e. 200hp x .10 = 20 gal/hr wot. It's a starting point. Enjoy your new boat.
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  3. Bruceleonard
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    #3 07-15-2020, 10:27 PM
    Thank you
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  4. Javman389
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    #4 07-16-2020, 09:57 AM
    My 389 has a fuel tank that is approximately 40 gallons, I believe yours is the same. I would guess that motor at WOT gets at best 3 miles per gallon.
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  5. Bruceleonard
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    #5 07-16-2020, 10:19 PM
    Is WOT Wide open throttle?
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  6. Nightmare
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    #6 07-17-2020, 12:06 AM
    Quote Originally Posted by Bruceleonard View Post
    Is WOT Wide open throttle?
    Correct
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  7. joe409
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    #7 07-17-2020, 10:14 PM
    I have a 1996 409 it has a 51 gal tank
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  8. darryl1966
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    #8 08-03-2020, 12:19 AM
    my 1996 409T DC holds 52 gallons I was told , I can run all day and use less than a half tank of gas, stay of the loud pedal , cruise at 50 mph and it sips the gas, 225 Johnson ,
    1996 Javelin 409T DC /225 Johnson Venom
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  9. Bassalive
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    #9 08-03-2020, 10:36 AM
    I love the 409s man I miss the OMC boat group.

    I had a 379 TDC and she held 38 US GAllons.


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