How Do You Troubleshoot A 1990 Mercury Boat Motor?
Troubleshooting your own 1990 Mercury boat motor is a detailed but not complicated process. You should check the engine over when you bring the boat out for the new season, and at least once during the season. Inspecting the engine and electrical systems for any problems or impending problems may save you a lot of inconvenience, especially if you are taking the boat out on a fishing trip with friends. Put the mouse ears on the lower unit over the intake ports, hook up the hose, and turn on the water. Set the voltmeter to 20 volts. Remove the battery cover and put the red positive lead from the voltmeter on the positive of the battery and the black lead on the negative. It should read 12.3 volts or better. If not, the battery is discharged and must be checked further for charging. Take the caps off the battery and check the water level. It should be close to the top. If not, fill it with distilled water. Chlorinated water kills battery acid. While keeping the voltmeter connected to the
