How To Check Spark Plugs In Boat

Since 1968 west marine has grown to over 250 local stores with knowledgeable associates happy to assist.

How to check spark plugs in boat. If your outboard wont idle right. Disconnect the spark plug lead from the coil tower. Try to remove the spark plugs by hand the ensure the plugs are properly seated. Gently pull the boot and cable away from the spark plug.

Inspect the spark plugs for damage to the insulator tip boot and upper and lower insulators. After the wire is removed use your socket wrench with the spark plug socket to remove the spark plug. These are the two most common types of spark plugs used in outboards. Then remove the plug and as dennis recommended vacuum out any loose debris.

The coil tower is connected to the secondary circuit. Next check the spark plugs for signs of fouling. To know for sure if a fouled or damaged spark plug is the cause of your boats engine issues youll need to examine the spark plugs. How to test spark plugs using a basic multimeter duration.

Five important diagnostic checks to use connect a spark plug wire onto the end of the plug and fasten the alligator clip to a bolt or to bare metal for a good ground connection. Place the socket around the spark plug and turn the socket counterclockwise. Use a spark plug wrench to remove the plugs one at a time and tag them to identify the cylinder in which they were installed. Leaving the original spark plugs in place and while remaining clear of moving parts have someone crank the engine over.

Ensure the spark plug wires are properly connected. The secondary circuit sends the electrical charge from the coil to the distributor where the voltage is then sent on to the spark plugs to fire the engine. Grab the spark plug boot and turn it 900 counterclockwise. Here is the difference between surface gap perma gap spark plugs and j style spark plugs.

A fouled spark plug occurs when the plug isnt burning fuel normally leaving damage to the plug which can cause the engine not to start. With the plugs in wrap a rag around the end of a screw driver spray rag with some carb cleaner then wipe around the plug and get out as much gunk as possible. Shop read reviews or ask questions about spark plugs at the official west marine online store. A normal spark plug will appear dry with a grayish color.

How to rule out a spark plug as your problem duration. Then get the rag and screwdriver in there again and keep cleaning until satisfied. Inspect the entire wire from the plug to the magneto beneath the armature plate.