Forgot to mention the one simplest oops that has gotten me, I think Matt and others as well. The refrigerator door syndrome. Unit runs fine pulled out then after you put it back in it starts to falter and die. The tygon fuel line between the tray and pump can partially kink when you push it back on the slides. There was from the factory a screen door type spring to dress the hose but those have rotted away. It is about $2-3 for that section of hose at a mower shop.