I have a Johnson Ocean Runner 175hp and an alarm sounds after it has been started and idles for about 15 seconds or so. The alarm sounds for about 5 seconds and then shuts off. The check engine light stay on. The water temp guage does not register but the "pisser" has plenty of water coming out. The alrma sounds everytime, even when the motor has been running. The motor has run fine like this without any hic-ups.