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  1. #1
    My Boats:
    new to me 388 slingshot 2000 velocity 390 sold 2005 390 velocity sold 2001 390 velocity sold 260 velocity sold 320 velocity sold 30ft velocity sold vr1 velocity sold 35 Cigarette sold. 34 phantom cur.
    Join Date
    Apr 2003
    Punta Gorda

    Whats the differance in fuel consumption 500carb or 500efi

    Do think its alot?

  2. #2
    Registered Ratickle's Avatar
    My Boats:
    43' Black Thunder, 39' Scorpion, 24' Empress, 10' Bonanza
    Join Date
    Feb 2006
    West Michigan
    I converted my Marlin from carb to Cutler Injection syystem with a 2000 Holley Dominator throttle body and my fuel comsumtion was almost cut in half. 509 dynoed at 575HP. Then I switched to 540's with 630HP from 420's in the 39 Scorpion and in the change converted from carbs to Haltec fuel injection and again the fuel comsumption was cut almost in half. I don't know what the change would be on stock engines but it would have to be an improvement too.

  3. #3
    Registered Canada Jeff's Avatar
    My Boats:
    Sunsation and Apache
    Join Date
    Dec 2003
    Ottawa, Ontario,Canada baby!
    I run an efi 500 and my buddy runs a 500 carb we both have the same boat, same speed. Fuel consumption has always been very close.

  4. #4
    My Boats:
    54' Searay cockpit motoryacht 36' Concept with t/250s and a 34'Rinker cruiser
    Join Date
    Jan 2001
    Albany NY
    I get 1.2 mpg all day long with my 500 efi's in the Gladiator

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