idling a little erratically, also coughs a bit and black smoke whenever I up-throttle sharply, so I decided to check plug...to my surprise my usual spark plug tool did not fit, it's a 5/8 hex plug instead of usual 13/16..ok, no biggie.Get 5/8 plug socket...but...plug is also 19mm reach , ie, equivalent to Champion N9YC or NGK BP7ES in reach for example..which I find odd for any Briggs motor..
Every way you look at it, this plug looks odd for Briggs 4stroke.
Definitely Briggs engine, has several sticker tags on it..looks like some kind of variation of a Quantum engine..even though I know Yard King mowers are NOW Chonda-engines..whih that confusion might be why it could have wrong shape/style plug in it.
.then I look in plug hole... looks not long enough not enough threads to match that 19mm reach plug..which is bad of course because means last 2-3 threads on plug could get deposits on tjem and jam plug in plughole... ..BUT...BUT..otoh, hole appears TOO long for usual common Briggs spark-plug size..which of course has same reach as a Victa Champion CJ8..whatever reach that is classed as..maybe 1/2 or 5/8?
So I try to look up engine model in online plug catalogues..absolute nightmare . So is trying to get anywhere with it on Briggs&Stratton USA site...these Yard King mowers are non North American market anyway, so this engine series it might not even be listed there at all.
anyone know what it is and what plug it takes?
I have images of ID stickers on engine and front of chassis shell.
