i have a 200 johnson venom. i had the boat put up for the winter. Got it out and it did great the first time on the water. The 2nd time out my alarm went off and the check engine light came on. it did it off and on all day. its not the oiler, water pump. what i did notice was when i would trim the motor the voltage meter would go from the positive to way over in the negitive. the alarm and light goes on and off. it is not steady. any one got an answer?