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  1. 07-13-2004 12:10 PM #1
    captbuddy Guest

    7.5 Onan Generator

    Can anyone give me an idea of the average fuel burn per hour on a 7.5 Onan diesel genset? It's a 1981 model, if that makes any difference. I've been told it depends on the load you are pulling. Thanks in advance.
    captbuddy
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  2. 07-13-2004 02:11 PM #2
    67HAT34C Guest

    ONAN 7.5 FUEL CONSUMPTION

    SPECS CAN BE FOUND IN THE OWNERS MANUELS. THESE ARE AVAILABLE THROUGH ONAN DEALERS. RECOMMEND YOU CALL A FEW, TALK TO THE OLD TIMERS WHO USED TO WORK ON THESE. THEY ARE A GREAT HELP. IF YOU CANT FIND THE BOOKS, TRY E BAY, THERE ARE ALWAYS MANUELS FOR SALE.

    I HAVE A 1985 4.0 MCCK, GAS. FACTORY SPEC FUEL BURN IS .7 GPH AT FULL LOAD. WOULD SUSPECT YOURS WILL BE LESS THAN .5 GPH.

    GOOD LUCK
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  3. 07-13-2004 03:35 PM #3
    FreestyleBruce Guest

    Onan Fuel Burn

    The manual for my 7.5kw MDJE says .5 gallons per hour under load.

    I tried to calculate it after a four day run and think that .5 sounds about right. The engine that the generator shares a tank with is more efficient than its friend on the other side of the boat. So its hard to tell.
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