Ryobi RY40402A User Manual 10 - Page 16

TROUBLESHOOTING IF THESE SOLUTIONS DO NOT SOLVE THE PROBLEM, CONTACT YOUR AUTHORIZED SERVICING DEALER. PROBLEM CAUSE REMEDY Engine fails to start. No fuel in tank. Fill tank. Spark plug shorted or fouled. Replace spark plug. Spark plug is broken. (cracked ­porcelain or electrodes broken) Replace spark plug. Ignition lead wire shorted, broken, or Replace lead wire or attach to spark disconnected from spark plug. plug. Ignition inoperative. Contact authorized service center. Engine hard to start. Water in gasoline or stale fuel mixture. Drain entire system and refill with fresh fuel. Engine is under or over choked. Adjust choke as necessary. Weak spark at spark plug. Contact authorized service center. Engine lacks power. Air filter clogged. Clean air filter. Refer to Cleaning the Air Filter Screen earlier in this manual. Engine overheats. Insufficient lubricant in fuel mixture. Mix fuel as described in starting ­instructions. Engine starts, runs, and accelerates Idle speed screw on carburetor needs Turn idle speed screw clockwise to in- but will not idle adjustment. crease idle speed. See Figure 16. Engine emits too much smoke Too much oil in crankcase. Drain lubricant and refill with correct amount of 10W-30 engine lubricant. See Adding/Checking Engine Lubricant in the Operation section of this manual. Engine rope cannot be pulled Oil has entered the combustion This is usually caused by storing the unit chamber. for an extended time with the engine in an upside-down position. Remove and clean the spark plug. Drain the oil out of the spark plug hole, then reinstall the spark plug. 12 - English