I'm old school. I use a hand held airplane starter with a donut on it. It never needs a new belt, it never has a problem lining up, and it will bump start any motor I've come across without loosing up the glow plug. Best of all it is only about $20 for the motor and $5 for the donut. I have used the same donut and motor for the past 15 years. I have started my new P5, Sirios, many OS engines and will soon be using it for my WS7II.