The worst one I have had was the lady that had bought one rang ne a few days later in a huff because her mower had grinded and clunked to a stop.
I Asked if she had mixed oil with the fuel and was assured that the servo had done that. Intrigued by this I went for a look, it appears that if your catcher gets full enough it will kill it.
Emptied the catcher and it went first pull. lol.
