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  1. #11
    New Member
    Join Date
    May 2013
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    13
    Location
    Tallahassee FL
    Tractor
    B&S

    Default Re: B&S 21hp v-twin governor adjusting problem

    It was my relative machine. He bought a new one two years ago and he is saying that it run funny last time.
    I just moved to a place with a huge yard so that is the reason I got it.
    The front side of the carbis exactly intake gates. The choke plate is on the engine side. If I start engine and push the intake (front) plate up with my finger - it runs fine. The problem is that I can't make it that way adjusting the mechanisn (according to the manual of course).
    Thanks for your help - if you could send me a picture how it supposed to be it would be awesome.

  2. #12
    Veteran Member
    Join Date
    Mar 2010
    Posts
    2,133
    Location
    Ontario
    Tractor
    CT235

    Default Re: B&S 21hp v-twin governor adjusting problem

    will do.
    Tim.

  3. #13
    New Member
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    May 2013
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    13
    Location
    Tallahassee FL
    Tractor
    B&S

    Default Re: B&S 21hp v-twin governor adjusting problem

    thanks a lot

  4. #14
    New Member
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    May 2013
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    Location
    Tallahassee FL
    Tractor
    B&S

    Default Re: B&S 21hp v-twin governor adjusting problem


  5. #15
    Veteran Member
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    Mar 2010
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    2,133
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    Ontario
    Tractor
    CT235

    Default Re: B&S 21hp v-twin governor adjusting problem

    Here we go. This is with throttle and choke controls closed, engine off.

    I also made an error in my description of the carb; you obviously can't see the throttle or choke blades looking into the inlet. Getting my motors mixed up.

    From manipulating the linkage though, I can tell that the throttle is closed when the motor is off, to answer your previous question.

    -20130509_160908-jpg
    Tim.

  6. #16
    Gold Member
    Join Date
    Nov 2012
    Posts
    254
    Location
    Newark, de
    Tractor
    International 424

    Default Re: B&S 21hp v-twin governor adjusting problem

    I have not seen a guide plate cause rods to bend on these engines. Overspeed will bend them for sure. If the Gov shaft was and is stuck not moving, could be your problem. Also when you replaced the rods there are 2 different rods for the intake and exhaust. Check the gov where it goes thru the block and make sure it moves freely, carburator throttle shaft must also move freely and not bind as it will also cause a problem. When they sit for long periods things get gummed and stuck.

  7. #17
    New Member
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    May 2013
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    13
    Location
    Tallahassee FL
    Tractor
    B&S

    Default Re: B&S 21hp v-twin governor adjusting problem

    thanks a lot it really helps. That means I have problems with governor mechanism not with springs.
    The valves guides came out ( it supposed to be pressed into the cylinder), there is a chance that it happened out of over speeding.I saw it happen on other engines. Of course I put proper rods. The engine runs - I can drive it up on trailer and back. It just has to be choke out. Otherwise it runs to fast. A lot of black smog though.
    Thanks for your help - I think I will have to crack it open and see what is going on with the governor mechanism.

  8. #18
    New Member
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    May 2013
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    Location
    Tallahassee FL
    Tractor
    B&S

    Default Re: B&S 21hp v-twin governor adjusting problem

    governor shaft is spinning about 1/8 of a turn ifthe shaft nut is released. Do you think its enough?
    Thanks again.

  9. #19
    Gold Member
    Join Date
    Nov 2012
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    254
    Location
    Newark, de
    Tractor
    International 424

    Default Re: B&S 21hp v-twin governor adjusting problem

    It should move a little more than that. does it feel tight or move freely?

  10. #20
    New Member
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    May 2013
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    Tallahassee FL
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    B&S

    Default Re: B&S 21hp v-twin governor adjusting problem

    Quote Originally Posted by sox3 View Post
    It should move a little more than that. does it feel tight or move freely?
    May be its just a bit more. It spins easily.

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