1、 Daily inspection

1. Pre startup inspection
   • Oil levelEnsure that the oil level is within the range marked on the dipstick. Too little oil can lead to insufficient lubrication, while too much may cause oil leakage.
   • fuel levelCheck if the fuel tank is sufficient to avoid shutdown due to fuel shortage during operation.
   • Air filter cartridgeCheck if the filter element is clogged or dusty, and clean or replace it if necessary.
   • pre-wateringBefore starting, it is necessary to fill the pre filled water to prevent damage to the sealing ring caused by the water pump running idle.
   • Inlet and outlet water pipelinesCheck if the connection between the suction pipe and the outlet pipe is secure to avoid air or water leakage.
   • Inlet filter screenEnsure that the filter screen is not clogged with debris to prevent damage to the water pump from inhaling large particles.
2. Monitoring during operation
   • Water temperature and oil pressureObserve the water temperature gauge and oil pressure gauge to ensure they are within the normal range (such as water temperature not exceeding 90 ℃).
   • Abnormal noise and vibrationIf the water pump makes abnormal noise or vibration intensifies, it may be due to impeller jamming or bearing damage, and it needs to be stopped immediately for inspection.
   • outlet pressureCheck if the outlet pressure is stable. If the pressure is insufficient, it may be due to impeller wear or pipeline blockage.
3. Post-shutdown inspection
   • Drain plugAfter stopping the machine, unscrew the drain plug and drain the accumulated water in the pump body to prevent freezing and cracking in winter.
   • Water accumulation in the inlet pipePull the rope to open the bottom valve core and drain the accumulated water in the inlet pipe.
   • Appearance cleaningClean the dust and debris on the surface of the water pump to maintain good heat dissipation.

2、 Regular maintenance

1. oil change
   • replaceChange the engine oil after 1 month of use or 20 hours of operation.
   • Subsequent replacementReplace it every 6 months or after 300 hours of operation, using 4-stroke motorcycle oil.
   • PrecautionsThe oil level should be moderate (about 60 milliliters), as too much or too little can affect the engine life.
2. Air filter maintenance
   • washClean the filter element with a non flammable solution, let it dry, immerse it in clean engine oil, squeeze out excess engine oil, and then reinstall it.
   • replacement cycleClean every 3 months or 50 hours of operation, and shorten the cycle in harsh environments.
3. Spark plug maintenance
   • checkVisually inspect the spark plug for wear or broken insulation ring, and measure the gap with a plug gauge (standard is 0.70-0.80mm).
   • clean upIf the carbon deposition is severe, remove it with a knife, adjust the gap, and then reinstall it.
   • replaceIf the spark plug is damaged, a new part needs to be replaced.
4. Maintenance of fuel valve and muffler
   • Fuel valve cleaningClean every 3 months or 100 hours of operation to prevent blockages.
   • Silencer mesh coverClean every 12 months or 300 hours of operation to ensure smooth exhaust.
5. Cylinder pressure detection
   • inspection cycleCheck cylinder pressure every 6 months or 200 hours of operation to ensure normal engine compression.
   • exception handlingIf the cylinder pressure is insufficient, it may be due to worn piston rings or poor valve sealing, and disassembly and maintenance are required.

3、 Operating standards

1. Start and Stop
   • startTurn on the fuel switch, throttle to 1/2, close the choke valve, pull the starter lever until there is resistance, and then quickly pull it.
   • shutdownMove the throttle lever to the fully open position, turn off the engine switch and fuel switch to avoid direct shutdown at high speeds.
2. Operational requirements
   • CPC Gate WorkAvoid long-term low throttle operation to prevent poor engine lubrication.
   • Specially assigned person to superviseWhen working in areas with insufficient water sources, a dedicated person should be responsible for supervision. After working continuously for 3 hours, the machine should be stopped for inspection.
   • No pumping allowedDo not pump flammable or corrosive liquids (such as gasoline, acid, etc.) to prevent fire or equipment damage.

4、 Storage protection

1. Before long-term discontinuation
   • Carburetor treatmentClose the carburetor inlet valve and allow the engine to automatically shut down to prevent gasoline oxidation inside the carburetor.
   • Pump body cleaningPour clean water into the inlet pipe and clean the impeller chamber until all sediment is drained.
   • Fuel storageDrain the remaining fuel from the fuel tank and store it properly in a dedicated container.
2. storage environment
   • Location SelectionStore in a cool, ventilated, and dry place, away from sources of fire and flammable materials.
   • Dust protectionWrap the inlet and outlet with cloth or tough paper to prevent debris from entering.