Gap setting for briggs-stratton 6.5 lawn mower

.030 is the proper gap setting.

What is the right spark plug and gap for my small engine Briggs Stratton ..look at this page it might help you out

Gap should be set at .030

.003-.005 Intake
.005-.007 Exhaust

0.28"

.030

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.

http://www.smallenginesuppliers.com/html/engine-specs/briggs/common_specs_single_cyl_lhead_engines.pdf

The proper gap is ..030" Here is the Briggs application chart for L-Head engines like yours.
http://www.manddsmallengine.com/briggs/info/plug7.html

Set plug gap at 0.030 inches -- standard recommendation is to change plug every year. Few do that -- cleaning and re-gapping is what most do. Platinum plugs last longer...

Charlie

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