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  1. #11
    Join Date
    Jun 2011
    New Jersey
    TORO,JACOBSEN,CRAFTSMAN Try this place . I get new crate motors very cheap - all few years old new stock surplus .


  3. #12

    Join Date
    Jun 2011
    I Don't Own a Mower :(

    Re: Briggs Vanguard HELP!

    ok guys got some new developments, with the MUFFLER OFF I sarted the engine up, and like before It needed full choke and about 50% throttle and smoked heavly for only a minute or two, then the smoking almost completely stopped. At this point I slowly took the choke out little by little until it was off completely then I messed with the throttle going from full to idle and eveything in between. Still no smoke and the engine seemed to be running happily with a slightly rough idle and heavy backfireing when ever throttle was quickly reduced. I decided to take the machine out for a test drive and it did pretty well, seemed to be lacking a little bit of power and would die under heavy sudden load but would start right back up.
    I investigated the muffler closely and foud some cracks on the back side of it and after banging on for a while I managed to get about a 1/4 cup of what looked like rusty carbon out of it, some chunks but mostly powder. at this point nothing else is coming out of the muffler and I dont hear anything rattleing around inside it.
    So after letting the engine cool COMPLETELY I crossed my fingers and tried starting it up. But it did the same thing, needed full choke and 50% throttle to run until it hit operating temp, only then could I dump the choke and play with the throttle, however the smoking seems to have stopped for the most part, I would say its atleast 90% better but smokes significantly more on cranking start up and when shutting down.
    At this point Ive got an engine with no muffler, that needs to be choked till it warms up, doesn't handle sudden load well at all, moderate all around power loss, smokes a little bit, and back fires when throttle is reduced quickly.
    Who wants to take a stab at it now??? ALL input is welcome

    Thank you all again for taking the time to help a stranger out

  4. #13

    1,000 Post Club
    pugaltitude's Avatar
    Join Date
    Jan 2012

    Re: Briggs Vanguard HELP!

    I think you have a leak down test mixed up with a compression test.
    A leak down test uses compressed air to flow through cylinder head and if any leaks from compression related components shows on a guage, red being bad to green being good.

    A cylinder balance test is a test to see if maybe its only running on 1 cylinder which if lost a lot of power could be your problem.
    you need to put a wire from engine earth and connect to metal connector on plug lead at spark plug while engine running. If engine cuts out its only running on one cylinder so problem would be on other cylinder.

    I think think THIS could be your problem.
    The "best" engine you will ever own!

    Briggs & Stratton MST.

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