Re: Dead 15hp.
Are you sure your kill switch is not switched to "STOP" or is possibly staying grounded even when switched to "Run"? Disconnect the switch wires and test the switch with an ohm or continutiy meter to prove the switch is not malfunctioning. If this engine has a stop button in the throttle handle (my 15 HP Merc has one), check that it is also not preventing a start. Either the "Kill" switch or the "Stop" button in the handle can cause a no-spark if either is malfunctoning. Look for the simplest cause first. The other causes can be expensive to fix.