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Mercury outboard spark plug chart
Mercury outboard spark plug chart









Set the spark plug gap OR at least check the gap compared to the other New spark plugsĩ9% of the time you will not have an issue with the spark plug gap being off.

mercury outboard spark plug chart

If it does make sure to remove any corrosion before continuing making sure not to get anything into the spark plug threaded hole. Especially in salt water environments the beginning of the threading where the spark plug goes in can have a tendency to start to corrode. Inspecting the spark plug holes where the spark plugs thread into the engine is also important because you can check for corrosion. This is one good way to check for possible future issues so you can resolve them now before they become worse.įor example if you look at the spark plug and notice the center electrode porcelain is very white it could indicate that there is a intake air leak or possibly an issue with the carburetion for that cylinder. Or if there is a major difference in the amount of build up on the spark plugs this could mean other issues are happening in the engine. If there is a major difference in the color between the spark plugs. Check to see if any of the diodes are broken, or if any of the spark plugs look different than each other. Take an extra minute to look at the spark plugs. This is a quick but important step that is often overlooked. With Spark Plugs removed Inspect the spark plug holes and old spark plugs A swivel extension allows the socket to pivot at an angle allowing better access. As the available space is not enough to access with a straight extension. Generally the lowest spark plug on the outboard motor is the one that gives people trouble while trying to reach it. Usually this is not needed but some outboard motors have a spark plug in a position that makes it difficult to reach with a straight extension. Sometimes a swivel socket extension may also be needed.

mercury outboard spark plug chart

Often you may need to use a 3 inch or even a 6 inch socket extension bar to reach the spark plugs properly and have enough clearance to use the socket wrench without hitting anything on the motor.Ĥ. Sometimes getting your socket to reach the spark plug can be tricky with all the other parts on the motor getting in the way. Or you can also use a deep socket that fits your spark plug nut pattern. There are many spark plug specific sockets that work great that you can use. Socket that fits your spark plugs properly. Preferably a torque socket wrench, but either a regular socket wrench or a torque socket wrench will work. Tools you will need to change outboard motor spark plugs











Mercury outboard spark plug chart