Recent content by ARN Greencare

High lift blades are harder to spin than mulch blades. High lifts move more air...

Some of these things had governor spring issues causing what you're describing. It won't harm anything, and there's nothing wrong with the fuel management system. Some have different holes to position governor spring to make it less aggressive. Of course you'll need to reset the engine speed.

Run double blades.

Dude, your cam is worn out. It's obvious from the video you posted of the valves working.

Upper main bearing is usually first to go in these vertical engines.

You mean it surges at mid to full throttle under no load?