Makita EM4250 Instruction Manual

Also see for EM4250: Instruction manual Parts Breakdown Instruction manual

Contents

Makita EM4250 Instruction Manual Manual pdf 20 page image

20CHECKING THE SPARK PLUGOnly use the supplied universal wrench to remove or to install the spark plug.–The gap between the two electrodes of the spark plug should be 0.7-0.8 mm–(0.028”-0.032”). If the gap is too wide or too narrow, adjust it. If the spark plugis clogged with carton or fouled, clean it thoroubhly or replace it.CAUTION: Never touch the spark plug connector while the engine is running(danger of high voltage electric shock).SUPPLY OF GREASE TO GEAR CASESupply grease (Shell Alvania 2 or equivalent) to the gear case through the–grease hole every 30 hours. (Genuine MAKITA grease may be purchasedfrom your MAKITA dealer.)CLEANING OF FUEL FILTERWARNING: INFLAMMABLES STRICTLY PROHIBITEDInterval of Cleaning and Inspection: Monthly (every 50 operating hours)Suction head in the fuel tankThe fuel filler (1) of the suction head is used to filler the fuel required by the–carburetor.A periodical visual inspection of the fuel filter is to be conducted. For that–purpose open the tank cap, use a wire hook and pull out the suction headthrough the tank opening. Filters found to have hardened, been polluted orclogged up are to be replaced.Insufficient fuel supply can result in the admissible maximum speed being–exceeded. It is therefore important to replace the fuel filter at least quarterly toensure satisfactory fuel supply to the carburetor.REPLACEMENT OF FUEL PIPECAUTION: INFLAMMABLES STRICTLY PROHIBITEDInterval of Cleaning and Inspection: Daily (every 10 operating hours)Replacement: Annually (every 200 operating hours)Replace the fuel pipe every year, regardless of operating frequency. Fuelleakage may lead to fire.If any leakage is detected during inspection, replace the oil pipe immediately.INSPECTION OF BOLTS, NUTS AND SCREWSRetighten loose bolts, nuts, etc.–Check for fuel and oil leakage.–Replace damaged parts with new ones for safety operation.–CLEANING OF PARTSKeep the engine always clean.–Keep the cylinder fins free of dust or dirt. Dust or dirt adhering to the fins will–cause seizure.REPLACEMENT OF GASKETS AND PACKINGSIn 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.Gear caseFuel pipeFuel pipeGrease holeHouse clampFuelfilter(1)0.7 mm - 0.8 mm(0.028” - 0.032”)