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X540 backfires when angage lawn mor for few times

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On my Murray lawn mower Briggs engine, after starting up, it backfires. What are the possible problems?

You timing needs checking and adjusting. The timing is too far advanced if it backfires through the carburettor, or retarded if it fires through the exhaust.

Nov 15, 2016 | Garden

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I have a sanli mulcher lawnmower about 3years old, always ervicedand looked after. last few uses its been gutless. today it was running but stopped. when I went to restart it, it made ratchetting sounds,...

Never heard of a sanli. If the engine is backfiring, indeed it could be out of time. One sure way to check if it is out, is to see if the flywheel key is sheared.
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Sep 05, 2010 | Garden

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I'am considering purchasing a x540. just trying to find out if there are any week spots with this mower.

I,a current John Deere lawn and garden tech say there is none.Just follow proper maintenance and machine would last for many years.

Nov 15, 2009 | Garden

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When letting out brake on lawn tractor it begins to backfire

if you have overhead valves, it is likely they are out of adjustment. These overhead valves are notorious for this, even having the retaing nut or the entire stud coming loose, or off. often the pushrod running loose against the guide will wear it entirely in two. Don't get too worried, these parts are relatively cheap, though having them installed and the valves properly set may cost a few bucks. be sure someone experienced with this problem does the repair or the valve will continue to come loose. This may not be your solution, but with backfiring, valves or ignition timing. Generally those two are the culprit. Yours backfiring under load makes me lean towards the valves.

Jul 17, 2009 | Craftsman 20 Hp 42" Deck Lawn Tractor

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It won't stay on.

I think you'll need to buy a new bulb,

May 16, 2009 | InFocus Proxima UltraLight X540 Multimedia...

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