I have a Briggs/Daihatsu diesel on a Scag Sabre Tooth Tiger that will not start. The starter turns the engine just fine but it will not start. I charged the battery to make sure voltage was high enough. (I know my Ford won't start if voltage drops below a certain point) I even tried to spray a little starting fluid and got nothing. It just cranks and cranks. I check two fuses and both were good. Any thoughts on this or anyone seen similar?