BF135A•BF150A 9.TROUBLESHOOTING a. ENGINE • HARD STARTING • Use a known-good battery for troubleshooting. Does not come ON. Perform ignition (power) system trouble- shooting (P. 2-20). Does not sound. Perform warning system troubleshooting if the warning buzzer sounds twice but keeps sounding (intermittent sound). Does not turn. Perform starting system troubleshooting (P. 2- 23). No fuel or low level. Add fuel and restart the engine. Perform the following checks. Check for collapsed or pinched fuel line. Check whether the air vent knob of the tank is closed. Check the primer bulb for air leakage. Squeeze the primer bulb and check whether the fuel reaches the vapor separator.
If there is no problem, perform fuel supply sys- tem troubleshooting (P. 5-96). Fuel flow restricted. Abnormal. Perform fuel supply system troubleshooting (P. 5-96). Low compression. Perform the following checks and adjust- ments. Check valve clearance(P. 3-9) Check valve timing (P. 9-12) Check for loose cylinder head Check for damaged cylinder head gasket, valves and valve seats. Check for worn pistons, piston rings and cylinders. 2-14 Turn the ignition switch ON. Check whether the MIL comes ON for 2 seconds. Come s ON. Check whether the warning buzzer sounds twice. Sou nds. Check whether the starter motor turns. Tur ns. Check the fuel level in the fuel tank. Fuel le vel OK.
Remove the vapor separator drain screw and check whether the fuel flows out freely. Fuel flo ws freely. Remove the spark plugs and check for wet fouled electrodes. Nor mal. Dry the spark plug electrodes and check whether the engine starts. Does n ot start. Check whether the cylinder compression is normal (P. 2-15). Compres sion OK. Perform ignition system troubleshooting (P. 2-25).