Just to follow up on Dean's suggestion, I've had some as a no - start after a snow event up here, both the S- 300's and some of the smaller ones, where they quit on site, - I did some quick checks on - site before it had to be brought back to shop, and more than once I found a two wire plug underneath the injector pump and above the fuel filter that was soaked with water on the inside, effectively creating a dead short that caused the engine to not restart - It would crank over fine but refused to fire - After I cleaned out the plug, both sides, I reconnected it and sealed it externally to prevent further water intrusion, it turned over and fired up right away - hope that helps - good luck -

Roger Rutledge
Technician/Shop Foreman
Riverside Landscape Contractors Inc
Brantford, Ontario, Canada