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Fouling Plugs on Clutch Side

I keep fouling on the clutch side plug, recoil side runs nice and dry, brown, tan colour...clutch side is black soaked with oil. tried searching the site, but it says url not found on all pages i clicked on.
 
are you having high oil usage if you keep the bottle full (above the line to your drive for your water/oil pump) if so you could have a center oil seal on your crank leaking causing the plug to keep fouling
 
So do your best to diagnose and eliminate crank seals as the problem. Find someone with a leakdown test kit, or build your own from parts at the hardware store.
A crank seal will lose pressure and fail the test.
Monitoring oil consumption above, and below the center cavity hose outlet on the tank can be another good way to diagnose center crank seals too but is not as precise or indicative as a leakdown test.

Other things that could cause this are possible, here's a few that come to mind:
-oil injector failure (stuck open, oil fouling)
-sticking fuel injector (fuel fouling)
-weak spark on the fouling plug
 
the other thing you could do is once it gets past that crankcase oil hose half way down the bottle in theory it should stop then. but i know from rebuilding these motors they store ALOT of oil in that cavity.
 
So do your best to diagnose and eliminate crank seals as the problem. Find someone with a leakdown test kit, or build your own from parts at the hardware store.
A crank seal will lose pressure and fail the test.
Monitoring oil consumption above, and below the center cavity hose outlet on the tank can be another good way to diagnose center crank seals too but is not as precise or indicative as a leakdown test.

Other things that could cause this are possible, here's a few that come to mind:
-oil injector failure (stuck open, oil fouling)
-sticking fuel injector (fuel fouling)
-weak spark on the fouling plug

what i was refering to ^^^

as danbot stated could also be other things also just the oil consumption would be the "quick" check to start off my seals leak a little not enough to foul plugs but over time oil will drop in the tank when not running down to the hose and stop
 
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