OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions on Other Engines Rover 2 stroke Suzuki hard to pull start

Hi everyone, I have a Rover Suzuki M120X 2 stroke mower.

It's now hard to pull start with the plug in - gets stuck on compression stroke. It spins easy with the plug out.

My brief research suggest some sort of overpressure, but these engines don't seem to have pressure relief valves?

Any ideas?