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  1. #1
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    Default 40 HP Force idle adjustment

    When i put my 40 hp Force motor into gear to go, in the water, the engine dies unless I sit there and let it warm up for about 15 minutes. It seems to idle fine, until it is put into gear, then it dies. in the water ( not on dry land ) Would increasing the idle speed correct this ? and if so can any one point me to the way to do that. There are several screws on the carb, but i don't want to go messing with any of them until I KNOW that i will not mess it up.

    In addition there is a note on the side of the engine that says that if the idle speed is adjusted, then the throttle cable must be adjusted In what way must the cable be adjusted.

    I imagine I could take it to ANOTHER marina to get it adjusted , but that is where it had been and i know what they did was adjust it , in the shop, WITHOUT having any water resistnace on the prop, as it does in the water, where it dies.

    Any advise would be appreciated

    Thanks

    Denny

  2. #2
    Fleet Admiral jerryjerry05's Avatar
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    Default Re: 40 HP Force idle adjustment

    Must be done in the water.Where are U located(profile).What are we working on?Year model.Any info U can think of.
    In the water,warm,in gear.should be about 750rpm.The tower shaft is where U adjust the idle.
    The end connector might need a small adjustment after you step up the idle.J
    IF YOUR OUTBOARD DOESN"T START WITHING A FEW SECONDS THEN SOMETHING"S WRONG!!!!

    Other websites are NOT the place to buy parts.They managed to screw up my last 4 orders.
    NO communication,NO follow through. Incompetent staff.Nuff said!

    Buy American made Cars and Trucks!!!Towing insurance for a boat,a GREAT thing.

    If you fix your problem,do the rest of the posters a favor and send in one more post telling who,what, how it was fixed.J

    88 Bayliner 21CC Twin 85hp Forces.

  3. #3
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    Default Re: 40 HP Force idle adjustment

    Currently in Pa this boat ( Alumcraft Angler ) is only / mostly used in Florida , last year I had this problem where i alwas had to advance the shift lever quickly to keep from staling upon engaging in gear. the motore is a 1996 Force 40 HP

    There is one spring washered screw on top of the carb about 2 " back from the opening, and one screw hold a half moon shaped accellerator lever . I do not know what you mean by the "tower shaft"

  4. #4
    Fleet Admiral jerryjerry05's Avatar
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    Default Re: 40 HP Force idle adjustment

    Get a manual FIRST!!! Do U have good compression(should have asked thet first)Then always put the year and model# and serial# when asking for help. ********** has diagrams for all Force motors.Follow this link to a generic diagram. Mercury Force outboard parts 40 H.P. (1992-1994) 0E000001 THRU 0E093699 SHIFT AND THROTTLE LINKAGE Diagram #11a is the towershaft the adjustment is done through #17/18 Loosen#18 and turn in #17 then retighten #17.J

    That screw on the carb is an air screw don't touch.If U already messed with it turn it in till it bottoms out.Then out 1 and 1/8th turn.
    IF YOUR OUTBOARD DOESN"T START WITHING A FEW SECONDS THEN SOMETHING"S WRONG!!!!

    Other websites are NOT the place to buy parts.They managed to screw up my last 4 orders.
    NO communication,NO follow through. Incompetent staff.Nuff said!

    Buy American made Cars and Trucks!!!Towing insurance for a boat,a GREAT thing.

    If you fix your problem,do the rest of the posters a favor and send in one more post telling who,what, how it was fixed.J

    88 Bayliner 21CC Twin 85hp Forces.

  5. #5
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    Default Re: 40 HP Force idle adjustment

    The yellow arrow is pointing at the idle speed adjustment screw. It has a lock nut to lock the adjustment. It's mounted on the arm attached to the vertical "tower shaft". The tower shaft rotates as you move the throttle back and forth. Screw it in to increase the idle speed. The screw with the spring on the carburetor itself is the idle mixture screw.
    Attached Images Attached Images

  6. #6
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    Default Re: 40 HP Force idle adjustment

    Possibly getting time to clean that carb.

    Mineral accumulation may be slightly restricting the very small passage for the idle fuel, making idle mixture just a hair lean, good enough to idle in Neutral but not quite enough for the load when shifted into gear.

    You may try opening the idle mixture screw, the one that passes thru a spring, turning it out (CCW) just an eighth turn, if this improves operation you should start planing on that carb cleaning.

  7. #7
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    Default Re: 40 HP Force idle adjustment

    Quote Originally Posted by pnwboat View Post
    The yellow arrow is pointing at the idle speed adjustment screw. It has a lock nut to lock the adjustment. It's mounted on the arm attached to the vertical "tower shaft". The tower shaft rotates as you move the throttle back and forth. Screw it in to increase the idle speed. The screw with the spring on the carburetor itself is the idle mixture screw.
    I NEVER would have guessed that that was the idle screw,,,,

    THANK YOU ALL !!! for the information, possible i can get it to run smoother this year on the Big O

    Denny

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