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Briggs and Stratton 6.25 wont start, pull cord pulls back when starting. Almost started but backfired through carb

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  • 247 Answers

Replaceing the spark plug will usually fix it. If not, it may need new points.

Posted on Oct 18, 2013

    CDUBYA Oct 18, 2013

    what kind of graphite? I have built many ATVs but this is my first lawn mower engine. Where would I find it?



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Posted on Jan 02, 2017

woobie dog
  • 1273 Answers

SOURCE: My Briggs stratton mtd lawn nower does't wanna


The recoil line isn't disengagimg when the engine first comes to life, and it's pulling back in under power, choking itself off. Here's what to do:

Remove the sheetmetal cowl that has the recoil starter in it. Remove the wire screen over the top of the magneto and ratcheting mechanism. The ratcheting mechanism is the four cornered part that the cowl fit onto, and it is screwed onto the crankshaft end where it comes up through the magneto. Use a block of wood and a hammer to unscrew the ratchet. Careful here; the ratchet has steel balls in it, and you don't want to lose them. Clean out the ratcheting mechanism and put a liberal dose of graphite in the cavity. If the steel balls are out of place, put them back evenly spaced, and work the ratcheting mechanism to distribute the graphite. Reassemble the mower.
Best regards, --W/D--

Posted on Aug 21, 2009

  • 496 Answers

SOURCE: we have a briggs and stratton sovereign petrol

If I'm understanding you correctly, the pull chord is out and will not retract so you can pull again?
If this is so, I'm thinking that there may be some obstruction keeping your spring from returning the rope. The spring is wound like a clock spring. When you pull the rope, the spring wants to bring it back. Sometimes a twig or dirt or other type of abnormality might prevent the spring from retracting your pull rope.
You might need to loosen the engine cover to remove the obstruction.
Good luck!

Posted on Aug 25, 2009

  • 143 Answers

SOURCE: briggs and stratton quatum 5 hp lawn mower engine will not start

Sounds like your ignition timing. If the blade hit something solid while cutting it might have bent the shaft or sheared flywheel shear key. This is not hard to replace, just remove the engine cover and flywheel. If its not that, it could be inside the engine and that would be a bigger job Stephen.

Posted on Sep 20, 2009

Testimonial: "good info! thanks"

  • 389 Answers

SOURCE: 13.5hp Briggs And Stratton snowblower.I tried to

Concerning your starter/pull cord problem, what has probably happened is that due to sitting idle for an extended period, the pinion gear had stuck in the down position on the clutch drive.

When you engaged it with power it spun as it was supposed to do but did not immediately spin up into the ring gear.

After you released the starter button and it began to slow down the gear spun up into the flywheel and jammed because it didn't have enough power to turn the engine.

A usually simple fix for this is to turn the engine backward by hand just enough to relieve the tension and the return spring will push the gear back down.

At this point, you can try the electric starter again and it should work properly. If it does not work, you will have to remove the starter and clean and inspect the starter drive on the top of the starter.

Concerning the fact that it would not start, you more than likely have some old fuel trapped in the bottom of the float bowl.

You may be able to remedy this by spraying some carburetor cleaner in the carb while trying to start it.

If it has spark and everything else is in good condition, it will start and run as long as it has carb cleaner getting to the engine so you may need to spray it a few times while it is running on that and sometimes the stale fuel problem will clear itself.

If it doesn't clear up and run on its own without the carb cleaner after 3 or 4 shots of spray you will need to remove the float bowl and clean it and the main jet with the carb cleaner.

Protect your eyes and bare skin while using the carburetor cleaner, it will injure you. Do not spray it on any rubber gaskets or seals, it will swell and ruin them.

Sorry for the "book" I wrote but I am trying to explore as many possibilities as I can to get you up and snow blowing!

Posted on Nov 05, 2009

Testimonial: "Cured the problem just like you said. Thanks"

  • 110 Answers

SOURCE: the timing on my 3hp briggs and stratton mower is

Timing is fixed - or at least it's supposed to be! There is a possibility that the flywheel key has sheared, allowing the timing to drift, but not likely.

No-start on Briggs engines are usually carb related. Test for spark, and if good, overhaul the carburettor.

Posted on Mar 16, 2010

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