Too much oil in pressure washer

I am assuming it is oil fouled rather than fuel fouled. Oil fouling is usually due to valve stem seal leakage. Most engines have the oil return on the cylinder head at the rear. When the engine is shut off, some oil pools at the rear of the head. If the valve guide seals are worn, then the oil will leak around the stem of the #4 valve and eventually foul the plug. If there are no real issues with the engine other than this one, it is usually best to keep a clean plug or two available and swap out the plug periodically when fouling is detected. Then clean the fouled one and keep for reuse later. If it is happening too often, getting the cylinder head reconditioned is a good idea.

new spark plug? flooding may have fouled the old one.

Oil has fouled the spark plug, This usually does not happen unless it got knocked over. Take out the plug and clean it off and see if it starts.

Things to check:
1) is water coming out of the bottom of the pump or is the oil in the crankcase high level and milky yellow. If so your seals are bad.

2) Your check valves might not be seating properly. A couple of fouled check vavles will cause either no pressure or pulsing pressure. A good inlet water strainer keeps foreign matter out of valves. But valves do wear out and get build up that keeps them from working right.

3) Your unloader valve might be worn or fouled. Bad unloader would usually show as low pressure ( but more than hose pressure) or low volume out the trigger nozzle.

Valves are your most likely problem.

Hello
Take out the spark plug and try pulling,if it is still hard then then there is a problem with the pull start mechanism.
Check the plug for oil fouling or fresh oil.If there is excessive oil you may have bad rings.

If in doubt, craftsman will honor the 1 year warranty no questions asked,for a new unit.

You must use the washer at full rpm - this is the way the units are set up to operate. If you don't your plugs will get fouled. Your spark plugs are fine.

Did you try a new spark plug. Old one may have fouled.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

drain the oil until the proper level is reached....let the unit sit for awhile until cool and then remove spark plug and clean it....i think it should be just fine....good luck

Oil level in pump and motor OK? Spark plug not fouled? Has it sat for a while - carb dirty? Running (loaded) throttle rpm not high enough?