Kubato ZG222

[Born2Mow]

Excessive idling WILL cause fuel vapors to build in the crankcase over time. Perfectly normal. Engine isn't designed to idle a lot. Full throttle/speed is what it's designed for.

The EPA has made carb, fuel tank AND engine breathers so complex that it's a wonder they can function at all. Certainly, most of it is counter to what the engine really wants. When 95% of the posts on a small engine forum read "my engine doesn't run right" or similar, you know something is amiss.

 

[lugbolt]

it's actually kinda rare to have an evap system problem on those mowers.

Stop and think for a minute. The engine (KZG770) is designed to run at 3500 RPM under a load for hours on end. Then, when someone is idling for a good while, the engine oil temp never gets hot enough to keep fuel vapors from building up in the crankcase. This is normal operation. "Why don't my car do it?"--because your car is designed to run at low rpm all the time. Different application.