Maintenance (continued)
If after checking the fuel mixture and cleaning the air filter the engine still will not idle, adjust the idle speed screw as follows.
1.Start the engine and let it run at a high idle for a minute to warm up.
2.Release the throttle trigger and let the engine idle. If the engine stops, insert a small phillips or flat blade screwdriver into the screw next to the air filter cover (Fig.
NOTE: The cutting attachment should not rotate when the engine idles.
3.If the cutting attachment rotates when the engine idles, turn the idle speed screw counterclockwise 1/8 of a turn at a time (as needed), to reduce idle speed.
Checking the fuel mixture, cleaning the air filter, and adjusting the idle speed screw should solve most engine problems.
If not and:
•The engine will not idle,
•The engine hesitates or stalls on acceleration,
•There is a loss of engine power,
have the carburetor adjusted by an authorized service dealer.
REPLACING THE SPARK PLUG
Use a Champion RCJ6Y spark plug (or equivalent). The correct air gap is 0.025 inch (0.655 mm). Remove the plug after every 50 hours of operation and check its condition.
1.Stop the engine and allow it to cool. Grasp the plug wire firmly and pull the cap from the spark plug.
2.Clean dirt from around the spark plug. Remove the spark plug from the cylinder head by turning a 5/8 inch socket counterclockwise.
3.Replace cracked, fouled or dirty spark plug. Set the air gap at 0.025 inch (0.655 mm) using a feeler gauge (Fig.
Do not sand blast, scrape, or clean electrodes. Grit in the engine could damage the cylinder.
4.Install a correctly gaped spark plug in the cylinder head. Tighten by turning the 5/8 inch socket clock- wise until snug.
If using a torque wrench torque to;
0.025 inch
(0.655 mm)
Fig.
17
