Assessments - 3, GPA: 3.3
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Fluid in the crankcase. Internal damage. Consult with an authorized servicing dealer. Consult with an authorized servicing dealer. Consult with an authorized servicing dealer. NOGood compression?Loose spark plug. Excess wear on cylinder, piston, rings. Tighten and re-test. NOYESDoes the tank contain fresh fuel of the proper grade? Refill with fresh, clean unleaded gasoline witha pump octane of 87 or higher mixed witha 2-cycle air cooled mixing oil that meets orexceeds ISO-L-EGD and/or JASO FC classifiedoils at 50:1 gasoline/oil ratio. Fuel incorrect, stale or contaminated; mixture incorrect. NOYESIs fuel visible and moving in the return line when priming? Check for clogged fuel filter and/or vent. Priming pump not functioning properly. Replace fuel filter or vent as required; restart. Consult with an authorized servicing dealer. NOIs there spark at the spark plug wire terminal? The ignition switch is in “O” (OFF) position. Shorted ignition ground. Faulty ignition unit. Move switch to “I” (ON) position and restart. NOYESYESCheck the spark plug.If the plug is wet, excess fuel may be inthe cylinder. The plug is fouled or improperly gapped. The plug is damaged internally or of the wrong size. Crank the engine with the plug removed, reinstall the plug, and restart. Clean and regap the plug to 0.024 - 0.028inch (0.6 - 0.7 mm). Restart. Replace the plug with an NGK BPMR6A or equivalent resistor type spark plug of the correct heat range. Set spark plug electrode gap to 0.024-0.028 inch (0.6-0.7 mm). YESWhat To Check Possible Cause Remedy LOW POWER OUTPUT Is the engine overheating? Operator is overworking the unit. Carburetor mixture is too lean. Improper fuel ratio. Fan, fan cover, cylinder fins dirty or damaged. Carbon deposits on the piston or inthe muffler. Cut at a slower rate. Consult with an authorized servicing dealer. Refill with fresh, clean unleaded gasoline witha pump octane of 87 or higher mixed witha 2-cycle air cooled mixing oil that meets orexceeds ISO-L-EGD and/or JASO FC classifiedoils at 50:1 gasoline/oil ratio. Clean, repair or replace as necessary. Consult with an authorized servicing dealer. What To Check Possible Cause RemedyEngine is rough at allspeeds. May also have black smoke and/orunburned fuel at the exhaust. Clogged air cleaner element. Loose or damaged spark plug. Air leakage or clogged fuel line. Water in the fuel. Piston seizure. Faulty carburetor and/or diaphragm. Service the air cleaner element. Tighten or replace. Repair or replace filter and/or fuel line. Replace the fuel. See page 7. Consult with an authorized servicing dealer. Engine is knocking.Overheating condition. Improper fuel. Carbon deposits in the combustion chamber. See above. Check fuel octane rating; check for presence ofalcohol in the fuel (pg. 7). Refuel as necessary. Consult with an authorized servicing dealer. Troubleshooting Guide (continued) ADDITIONAL PROBLEMS Poor acceleration. Clogged air filter. Clogged fuel filter. Lean fuel/air mixture. Idle speed set too low. Clean the air filter. Replace the fuel filter. Consult with an authorized servicing dealer. Adjust: 3,000 (±250) RPM (min-1). SymptomPossible Cause Remedy Engine stops abruptly. Switch turned off. Fuel tank empty. Clogged fuel filter. Water in the fuel. Shorted spark plug or loose terminal. Ignition failure. Piston seizure. Reset the switch and restart. Refuel. See page 7. Replace fuel filter. Drain; replace with clean fuel. See page 7. Clean and replace spark plug, tightenthe terminal. Replace the ignition unit. Consult with an authorized servicing dealer. Engine difficult to shut off. Ground (stop) wire is disconnected orswitch is defective. Overheating due to incorrect spark plug. Overheated engine. Test and replace as required. Idle engine until cool. Clean and regap the plug to 0.024 - 0.028inch (0.6 - 0.7 mm). Correct plug: NGK BPMR6A or equivalent resistor type spark plug of the correct range. Idle engine until cool. Cutting attachment rotates at engine idle. Set idle: 3,000 (±250) RPM (min-1). Replace spring/shoes as required, check idle speed. Inspect and re-tighten holders securely. Engine will not idle down. Engine idle set too high. Engine has an air leak. Set idle: 3,000 (±250) RPM (min-1). Consult with an authorized servicing dealer. Engine idle too high. Broken clutch spring or worn clutchspring boss. Loose attachment holder. ADDITIONAL PROBLEMS SymptomPossible CauseRemedyExcessive vibration. Warped or damaged cutting attachment. Loose gearcase. Bent main shaft/worn or damaged liner. Inspect and replace attachment as required. Tighten gearcase securely. Inspect and replace as necessary. Cutting attachment will not rotate. Shaft not installed in powerhead or gearcase. Broken shaft. Damaged gearcase. Inspect and reinstall as required. Consult with an authorized servicing dealer. Emission System Warranty Statement Your Warranty Rights and Obligations The California Air Resources Board, the U.S. Environmental Protection Agency and Shindai...
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