OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions on Other Engines Wesco OHV Four Stroke Engine Surprise.

I was dismantling this motor and found this cavity at the top of the engine under the magnetic flywheel. It is covered by a plate and gasket held on with two small bolts (removed). It has this steel mesh tucked in a cavity (visible in the photo).
Any idea what this is for? Very curious.

PCV valve MF. idea is to let air but not oil out - doesnt always work that way on the cheap ohv motors haha

Thanks for the fast response Tyler.
Do Hondas have this?

yep, definitely do. Also sport a better quality beige one way flap thats less prone to gumming up

MF all 4 stroke engines have the crank vent system, without it they would blow gaskets everywhere when the piston is on the downstroke the pressure has to go somewhere. On a 2 stroke this downstroke piston pressure is what pushes the fuel/air in the crankcase up above the piston through the transfer ports

Hi NormK and Tyler,

not such a surprise then, bog standard.
First time I've pulled off the upper flywheel from an OHV engine.