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Fowling plugs
Posted: Sun Aug 04, 2013 10:26 pm
by DJYZ250
Have 2006 YZ250, worked fine in hunter area, took to luee, fowled 3 plugs WTF??
Re: Fowling plugs
Posted: Tue Aug 13, 2013 12:23 pm
by 2TInstitute
Jetting is the answer look in your manual
Re: Fowling plugs
Posted: Fri Aug 16, 2013 1:11 pm
by Stankflapper
believe it or not I bet your rear silencer needs repacking!
Re: Fowling plugs
Posted: Fri Aug 16, 2013 9:52 pm
by TZR250
Stankflapper wrote:believe it or not I bet your rear silencer needs repacking!
why do you say that please
Re: Fowling plugs
Posted: Fri Aug 16, 2013 10:03 pm
by wheels999
TZR250 wrote:Stankflapper wrote:believe it or not I bet your rear silencer needs repacking!
why do you say that please
Not sure how that would be related.
Fouling plugs can happen for a number of reasons;
* low rpm operation for extended periods, plugs don't get hot enough to burn of oil residue
* too much fuel, too little air (jetted too rich, or air intake restricted (very dirty air filter), air density (e.g.. cold air / low altitude = higher density = leaner running, warmer air = richer running
* wrong plugs (too cold)
Re: Fowling plugs
Posted: Sat Aug 17, 2013 10:25 pm
by Link
Hi dont forget the rh crank seal sucking all the gearbox oil into the engine, always a suprizing source of fouled plugs. Link