Have a 5 year old Kawa Fv420 (14hp, OHV). Doing a lawn today, it started to lose power, then just quit, like it was out of gas, but it wasn't. Went over it tonight, found that there is no spark. Checked ign switch and safety cutouts, not the problem. I'm afraid its in the engine. Book says its a transistorized magneto so should be trouble free. Coils maybe? Any tests I can do to get to the problem? Hate to take to the repair shop, they are so busy. In fact, this is my backup mower. My primary machine is already in the shop for spindle bearing. Help! Grass is growing, and I'm out of mowers!