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How do I lower a over raving 24hp over head valve briggs and Stratton motor

Put new governer gears in motor and new head gaskets as the heads were leaking.but did,nt change any thing else

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Take the rod from the governor lever to carby off and see if you can move the governor lever freely or if it lees like it is not in the governor weights and cog groove
is the governor lever moving against the spring outside the crankcase
I suspect that you may not have put the lever end in the gear slot properly when reassembling the motor and the lever is not shutting the throttle plate as it should to stop over rpms
hopefully you did it right and it is the location on the lever on the shaft outside that requires repositioning

Posted on Dec 18, 2016

Testimonial: "thx Bill the gov rod moved and it help. I still got to use the throttle arm to keep it not over reving and to not stall. but I can work with that if you can"t help with that. thanks again Ed"

  • 4 more comments 
  • Bill Boyd Dec 19, 2016

    there should be a spring connected to the governor arm that is tensioned by the throttle cable so check that area as well

  • eburkett Dec 21, 2016

    there are 2 springs and I think I put them in the same way as b4. I ran it 2 clean the snow and it is starting 2 idle better, but I don't gauge 2 check the rpm so I use the throttle, I got 2 borrow some 1;s gauge 2 check it. so thanks Bill 4 now.

  • eburkett Dec 31, 2016

    my motor is revving at 3900 rpm and the spec. is 3650 rpm tops. if I shorten the gov, spring will that help or is there something else I can do.
    thx Ed

  • Bill Boyd Jan 01, 2017

    there should be a heavy spring attached to the governor arm
    the other end to a plate that turns to the throttle setting
    that way the governor has to react against the spring tension ans so pushes the throttle lever to the idle position
    as you want more power , the throttle cable attached to the plate moves the plate and so reduces the spring tension on the gov arm
    the arm reacts and pulls the throttle further open --more rpms and power
    the throttle cable is not connected directly to the gov arm but is used to alter the gov spring tension
    there should be a rod connecting the gov lever to the carby butterfly shaft
    by this method the engine rpms is controlled by the spring tension on the gov lever which you alter by the throttle cable position
    see if you can set it up like that
    any governor controlled engine will have a very similar set up so studying other motors will give an idea of what I am talking about

  • eburkett Jan 11, 2017

    what would the compression be on the motor?

  • Bill Boyd Jan 12, 2017

    same as any 4 stroke petrol engine 150.-165 psi anything under 125 is considered worn


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  • 6 Answers

Did you check the steering pump, AC compression pump, etc or other engine components ? it could be something other than the engine.

Posted on Jan 11, 2017


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Posted on Jan 02, 2017

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SOURCE: 1996 honda prelude oil leak

did you check the steering pump, AC compression pump, etc or other engine components ? it could be something other than the engine.

Posted on Nov 18, 2008

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SOURCE: 1999 olds alero leaking coolant

problem could be heads bolts . i put new bolts in put a little sealer on them . make sure your bolt holes is clean free from debris. put a lillte sealer on intake gasket on top and bottom where coolants travel. if all was done . drain engine oil in clean container .set it aside. take radiator cap off .you a coolant pressure rise kit .put a pan under oil pan with drain plug still off .pressure your radiator about 10 psi. make sure you have antifreeze in radiator and engine . when you pressure up to 10 psi look under the car if coolant comes out oil pan. you got leaking head gasket. if not .put oil pan plug back on . put oil back in car . check your freeze plugs also.

Posted on Mar 17, 2009

  • 89 Answers

SOURCE: Head Gasket?? Valve cover Gasket???

the valve cover, requiring the removal of 4 to eight bolts, easy enough for the novice to remove and replace.
is the uppermost piece of the engine under all the hose's and wire's that run a muck. the head gasket on the other hand requires the removal of all that can be seen as you peer under the hood.if it is just an oil leak it should not require a head gasket .
my suggestion would be to use an engine degreaser
such as gunk or Castor oil brand follow there instructions.and then drive the vehicle 20 minutes or so and look for fresh oil to determine exactly where the leak is coming from

Posted on Nov 12, 2009

  • 1 Answer

SOURCE: nissan 300zx twin turbo, VG30DETT motor. coolant

if car has a oil cooler that uses coolant to lower oil temp. check that, if not you might want to get a coolant psi tester and try locating leak that way. but my expierence is that a head gasket problems cause this also if block was bored and machined that could also be the issue.

Posted on Mar 04, 2010

Testimonial: "good advice, pulled the head off and found that the gasket had ruptured towards the back"

  • 1374 Answers

SOURCE: leaking coolant from head gasket area and valve

Well the head gasket job will cover the valve cover gasket ( you have to do one to get to the other) Bring it to a repair shop its about a $1500 job.

Posted on Apr 19, 2010

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