Question about Briggs & Stratton Lawn-Boy Insight Series 21-Inch 190cc 650 Series Gas Powered Engine Variable Speed Self-Propelled Lawn Mower
The timing is fixed by way of woodruff key in the crank which locates into a chanel in the flywheel and is not adjustable. If you mean the air gap between the ignition unit and flywheel then set it to aprox .002-.005 inch
Posted on Mar 07, 2015
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Posted on Jan 02, 2017
Sounds like you will need to clean your carburetor.
Sometimes you can get by with priming it a few times, and letting it
run a few times like that and it will flush the gunk out of the jets,
but most of the time you will need to rebuild the carburetor.
If the mower is over a couple years old, then I also recommend that you
buy and install a new carburetor repair kit, because the diaphragm will
get hard and that will cause it to be hard to crank.
When you clean your carburetor and remove the jet screws, count the
number of turns it takes to seat the jets from their original position.
That way when you go to put the jets back in, you know how many turns
they were in/out.
Please do not forget to rate me, Thanks
Good Luck, I hope this helped
Posted on May 26, 2010
Briggs lists it as .006 - .010 on this 6 HP L-head engine. The .010 width can easily be attained by using a standard sized business card as a feeler gauge (and it doesn't stick to the magnets in the flywheel). I double up the card, loosen the coil and let the magnets in the flywheel draw the pickup legs in until they press on the card, tighten up the retaining screws (threadlocker is optional) and your air gap is set.
Posted on Jun 10, 2011
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