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Manafacture: Dolmar File size: 11.27 mb File name: Language of manual:

Fuel leakage may lead to fire. If any leakage is detected during inspection, replace the oil pipe immediately. Fuel pipe INSPECTION OF BOLTS, NUTS AND SCREWS – Retighten loose bolts, nuts, etc. – Check for fuel and oil leakage. – Replace damaged parts with new ones for safety operation. CLEANING OF PARTS – Keep the engine always clean. – Keep the cylinder fins free of dust or dirt. Dust or dirt adhering to the fins will cause piston seizure. REPLACEMENT OF GASKETS AND PACKINGS In reassembling after the engine is dismounted, be sure to replace the gaskets and packings with new ones. Any maintenance of adjustment work that is not included and described in this manual is only to be performed by Authorized Service Agents. 21 STORAGE STORAGE WARNING: When draining the fuel, be sure to stop the engine and confirm that the engine cools down. Just after stopping the engine, it may still hot with possibility of burns, inflammability and fire. ATTENTION: When the machine is kept out of operation for a long time, drain up all fuel from the fuel tank and carburetor, and keep it at a dry and clean place. – Drain up fuel from the fuel tank and carburetor according to the following procedure: 1) Remove the fuel tank cap, and drain fuel completely. If there is any foreign matter remaining in the fuel tank, remove it completely. 2) Pull out the fuel filter from the refill port using a wire. 3) Push the primer pump until fuel is drained from there, and drain fuel coming into the fuel tank. 4) Reset the filter to the fuel tank, and securely tighten the fuel tank cap. 5) Then, continue to operate the engine until it stops. – Remove the spark plug, and drip several drops of engine oil through the spark plug hole. – Gently pull the starter handle so that engine oil will spread over the engine, and attach the spark plug. – Attach the cover to the cutter blade. – During storage, keep the rod horizontal or keep the machine upright with the blade edge oriented upward. (In this case, pay full attention to prevent the machine from falling.) Never store the machine with the cutter blade edge oriented downward. Lubricating oil may spill out. – Keep the drained fuel in a special container in a well-ventilated shade. Drain fuel Humidity Attention after long-time storage – Before startup after long-time shutdown, be sure to replace oil (refer to P 19). Oil will deteriorate while the machine is kept out of operation. Fault location Fault System Observation Cause Engine not starting or with difficulty Warm start problems Engine starts but dies Insufficient performance Ignition system Fuel supply Compression Mechanical fault Fuel supply Several systems may simultaneously be affected Ignition spark O.K. No ignition spark Fuel tank filled No compression when pulled over Starter not engaging Tank filled ignition spark existing Tank filled Engine idling poor Fault in fuel supply or compression system, mechanical defect STOP-switch operated, wiring fault or short circuit, spark plug or connector defective, ignition module faulty Incorrect choke position, carburetor defective, fuel supply line bent or blocked, fuel dirty. Cylinder bottom gasket defective, crankshaft seals damaged, cylinder or piston rings defective or improper sealing of spark plug Broken starter spring, broken parts inside of the engine Carburetor contaminated, have it cleaned Incorrect idling adjustment, carburetor contaminated Fuel tank vent defective, fuel supply line interrupted, cable or STOP-switch faulty Air filter contaminated, carburetor contaminated, muffler clogged, exhaust duct in the cylinder clogged 22 Operating time Item Engine oil Operating time Item Engine oil Before operation After lubrication Daily (10h) 30h 50h 200h Shutdown/ rest Corresponding P 13 Replace *1 19 Tightening parts (bolt, nut) Inspect 21 Fuel tank Clean/inspect — Drain fuel *3 22 Throttle lever Check function — Stop switch Check function 17 Cutting blade Inspect 11 Low-speed rotation Inspect/adjust 17 Air cleaner Clean 20 Ignition plug Inspect 21 Cooling air duct Clean/inspect 21 Fuel pipe Inspect 21 Replace *2 — Gear-case grease Refill 21 Fuel filter Clean/replace 21 Clearance between air intake valve and air discharge valve Adjust *2 — Engine overhaul *2 — Carburetor Drain fuel *3 22 *1 Perform initial replacement after 20h operation. *2 For the 200 operating hour inspection, request Authorized Service Agent or a machine shop. *3 After emptying the fuel tank, continue to run the engine and drain fuel in the carburetor. 2 TROUBLESHOOTING TROUBLESHOOTING State of abnormality Probable cause (malfunction) Remedy Engine does not start Failure to operate primer pump Push 7 to 10 times Low pulling speed of starter rope Pull strongly Lack of fuel Feed fuel Clogged fuel filter Clean Broken fuel tube Straighten fuel tube Deteriorated fuel Deteriorated fuel makes starting more difficult. Replace with new one. (Recommended replacement: 1 month) Excessive suction of fuel Set throttle lever from medium speed...

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