If you need further assistance, check out our service locator or contact our Customer Service Center at 1-87 to find where your nearest service center is located. This 7 HP engine enables the pressure washer to achieve 3,000 PSI and 2.7 gallons per minute. Using the spark plug socket and a torque wrench, tighten the plug to the specifications inside your engine owner’s manual. Hand tighten the plug making sure to not cross-thread it into the cylinder head. As above, properly gap the plug before placing it in the engine. If anything looks different, do not use the plug as engine damage may occur. Physically compare the new spark plug with the old one. Disconnect the spark plug wire, and keep the wire away from the plug to prevent accidental starting. If you need to replace the plug, make sure to only replace it with the exact model number or an equivalent cross-reference. This is done using a spark plug gauge and the gapping information from your engine owner’s manual. If the plug looks good, always make sure to check the gap before placing it back into the engine. If either is noted, replace the plug with a new one. ![]() The insulator should be free of cracks and carbon trails, the washer should be in place and free of cracks. Next, look at the outside of the spark plug. The carburetor is adjusted too rich (too much fuel) leading to overheating of the engine. Contact a trained service technician for accurate diagnosis.įigure 6: Replace spark plug. This is a serious condition, as the electrode may have fallen into the engine. Gap is set too far causing misfiring, hard starting and possible overheating.įigure 5: Replace spark plug. Insufficient spark or misfiring.įigure 4: Replace spark plug. ![]() The carburetor is adjusted too lean (too little fuel) leading to overheating of the engine.įigure 3: Replace spark plug. Normal wear and operating conditions.įigure 2: Replace spark plug. These are examples of spark plug conditions you may encounter:įigure 1: Good spark plug. Any other conditions noted, such has oil buildup, ash, blistering and fouling are indications of trouble that requires diagnosing by a trained service technician. The center insulator should be white and the electrodes should show no or very little wear.Įlectrode wear is common for spark plugs that have been used for many hours and indicate the plug should be replaced. You should be able to fully loosen and remove the spark plug with your fingers. With a spark plug tool or socket and ratchet, loosen the spark plug. Now you can remove the spark plug boot from the spark plug. ![]() If needed, while wearing safety glasses, use a few quick busts of compressed air to remove any debris. You do not want any debris to fall into the combustion chamber after the spark plug is removed. Important: Only work on the spark plug when the engine is cold to avoid burns.īegin by removing any dirt and debris that may be around the spark plug boot.
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