Need help

Discussion in 'Boating and Boat Rigging' started by Smitty03, Apr 24, 2020.

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  1. Apr 25, 2020 #16
    Smitty03

    Smitty03

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    I can’t tell you if the fuel filters been changed I know the fuel separator has. How many fuel filters are on it?
     
    Smitty03, Apr 25, 2020
    Smitty03, Apr 25, 2020
  3. Apr 25, 2020 #17
    Smitty03

    Smitty03

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    I think something fuel to, I forgot to mention it runs fantastic except after we troll for awhile when we go to take off it is loaded up an takes like a mile to clear it self out before it gets up an goes again
     
    Smitty03, Apr 25, 2020
    Smitty03, Apr 25, 2020

  5. Apr 25, 2020 #18
    Smitty03

    Smitty03

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    It acts like it either loaded up or starving for fuel u have to ease into the throttle little by little to eventually get to full but that’s only after trolling
     
    Smitty03, Apr 25, 2020
    Smitty03, Apr 25, 2020
  6. Apr 25, 2020 #19
    kroppe

    kroppe

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    Fuel starvation.

    Check (replace) all of the supply lines and filters.
     
    kroppe, Apr 25, 2020
    kroppe, Apr 25, 2020
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  7. Apr 25, 2020 #20
    kroppe

    kroppe

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    What year is your engine? Do you have an engine number? Can you post photos?

    This should be easy to narrow down. Throttle plate movement is what it is - it should move from closed throttle to WOT without question or equivocation. If it doesn't, something is wrong at the carburetor (linkage) or in the shift cable along its length, or at the helm.

    After you describe the behavior after fishing, it sounds more and more like fuel starvation. Look at this video at 0:52, the fuel filter is shown. Do you have this type of carburetor?

     
    kroppe, Apr 25, 2020
    kroppe, Apr 25, 2020
  8. Apr 25, 2020 #21
    kroppe

    kroppe

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    kroppe, Apr 25, 2020
    kroppe, Apr 25, 2020
  9. Apr 25, 2020 #22
    WALLEYE MIKE

    WALLEYE MIKE Staff Member Admin Super Mod Mod

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    Is yours a 4 bbl carb? I had a much heavier boat and one time had a hard time getting it on plane. I found the problem that the 4 bbl wasn't kicking in. There was a "tit" on the linkage that broke off and made it so it didn't kick in. Can't tell you what the RPM's were.
     
    WALLEYE MIKE, Apr 25, 2020
    WALLEYE MIKE, Apr 25, 2020
  10. Apr 25, 2020 #23
    Smitty03

    Smitty03

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    Thanks kroppe I appreciate it!! An yes I do have a 4 barrel holly on it. It’s an 87 4.3omc with cobra out drive
     
    Smitty03, Apr 25, 2020
    Smitty03, Apr 25, 2020
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  11. Apr 25, 2020 #24
    kroppe

    kroppe

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    Last edited: Apr 25, 2020
    kroppe, Apr 25, 2020
    kroppe, Apr 25, 2020
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  12. Apr 25, 2020 #25
    WALLEYE MIKE

    WALLEYE MIKE Staff Member Admin Super Mod Mod

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    Take off the top of the air filter unit. Then fully depress the accelerator and you should see the back 2 butterflies open. If not only your 2 front barrels are working. Might not be it but worth a look.
     
    WALLEYE MIKE, Apr 25, 2020
    WALLEYE MIKE, Apr 25, 2020
  13. Apr 25, 2020 #26
    Smitty03

    Smitty03

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    Thanks I appreciate it I’m going to look at it tomorrow an I’ll let you guys no what I find out!
     
    Smitty03, Apr 25, 2020
    Smitty03, Apr 25, 2020
  14. Apr 26, 2020 #27
    Smitty03

    Smitty03

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    So I looked at it today I found out (don’t know if normal) when I push throttle all the way down the throttle by the carb opens all the way.... but between neutral an half closer to half it closes an then I got about three inches left back to netural on the shifter it’s self. Sorry if it’s confusing to under stand best I can explain it
     
    Smitty03, Apr 26, 2020
    Smitty03, Apr 26, 2020
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  15. Apr 26, 2020 #28
    wildcoy73

    wildcoy73

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    The lower pitch makes the engine reach maximum rpm at slower speeds. Conversely, a higher pitch will deliver greater top speeds, but slower acceleration. ... If you're changingpitch on a recreational boat, remember that each inch of pitch is worth about 200 rpm. Lowering the pitch will increase rpm and vice versa. Sep 27, 2019

    Sent from my SM-N960U using Michigan Sportsman mobile app
     
    wildcoy73, Apr 26, 2020
    wildcoy73, Apr 26, 2020
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  16. Apr 26, 2020 #29
    kroppe

    kroppe

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    Thanks smitty. I'm not really sure from the explanation. Is there another way to describe what's happening? Did it seem normal to you?

    Are you saying that the throttle plates close when the helm throttle is at the halfway position?
     
    kroppe, Apr 26, 2020
    kroppe, Apr 26, 2020
  17. Apr 26, 2020 #30
    Smitty03

    Smitty03

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    Yes that’s what I meant to say,
     
    Smitty03, Apr 26, 2020
    Smitty03, Apr 26, 2020
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