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  1. S

    Briggs 31c707 17.5HP on Craftsman LT2000

    just reporting back... so it turns out the float bowl seal had perished - which means: 1. a definite cause of fuel loss, leading to me thinking it was "using" more fuel than it should 2. possibly has a bearing on fuel delivery too.. although... I also had a close look at the fuel filter, which...
  2. S

    Briggs 31c707 17.5HP on Craftsman LT2000

    Conversely, it seems to be USING more fuel than it should... not very scientific but i recall giving it a good amount, maybe a gallon and a half when i first got it. My other half tried to mow with it for about an hour, before reporting to me that it runs like a bag of <<bleep>>. Since then...
  3. S

    Briggs 31c707 17.5HP on Craftsman LT2000

    Yes please, that would be fantastic, I've pm'd you my email :)
  4. S

    Briggs 31c707 17.5HP on Craftsman LT2000

    ... you guessed it!! actually, the fuel tank is near empty, although enough fuel to run, lines SEEM clear on inspection, but will certainly look further into this and try with a decent amount of fuel in the tank
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    Briggs 31c707 17.5HP on Craftsman LT2000

    oh.. forgot to mention the mixture screw doesn't seem to do a whole lot. Apparently the thing to do is turn it fully clockwise, then back it off until the engine runs rough - then set it at halfway between those two points. Honestly, I couldn't detect any difference no matter where i have the...
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    Briggs 31c707 17.5HP on Craftsman LT2000

    another bit of info... the manual (for the mower) states carb can be "adjusted" by setting idle speed at 1750rpm and then turning mixture screw. setting idle speed is done by holding the governor back with thumb while bringing the idle screw to the correct position to achieve 1750rpm. bit of a...
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    Briggs 31c707 17.5HP on Craftsman LT2000

    Ok... so i gave the carb a clean, boil-washed it with detergent, sprayed out all the orifices with carb cleaner and compressed air. Back on the engine, still no better. idles ok at slow speed but very rough (sometimes backfiring) at high speed. Still wondering if the carb is kaput or whether...
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    Briggs 31c707 17.5HP on Craftsman LT2000

    indeed! I am in good hands clearly. Think I'll be having a good look at the carb tomorrow, already tried the usual few squirts with carb cleaner, but sounds like it needs deeper investigation, fairly sure there's a fuel starvation issue. Specs say idle speed should be 1750rpm (holding governor...
  9. S

    Briggs 31c707 17.5HP on Craftsman LT2000

    Thanks again - that makes sense now!
  10. S

    Briggs 31c707 17.5HP on Craftsman LT2000

    Thanks - that would make sense if it has no regulator - a bit confusing as the parts manual mentions one.. but then that could be only for specific models. I will investigate to see if I can spot a diode somewhere. What threw me about the ignition coil is that it has a wire on it, so assumed it...
  11. S

    Briggs 31c707 17.5HP on Craftsman LT2000

    Hi all, nice to be here... I recently got hold of a much abused Craftsman LT2000. Basically running like sh*t.. misfiring, backfiring, etc. Also, somebody has fitted a 42" deck to it (which is itself in a fairly sorry state) - the wrong size as this model of LT2000 takes a 36" deck. Anyway...
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