Westinghouse WH7500V portable generator

Oil change: Change the engine oil according to the procedure (to avoid impurities in the old oil corroding the engine).

Cylinder rust prevention: Remove the spark plug, inject 1 teaspoon of new engine oil into the cylinder, pull the starting rope 3-5 times (without ignition) to evenly distribute the engine oil on the cylinder wall, then reinstall the spark plug and pull the starting rope until the piston is in compression stroke (valve closed to prevent moisture from entering).

Battery handling: Disconnect the battery, store it separately after fully charging, and recharge it every 1-2 months (to avoid battery depletion).

After storage, remove and use:

Remove the dust cover and check the appearance of the generator for any damage or debris.

Connect the battery and check the oil level (replenish if insufficient).

Add fresh fuel (do not use fuel that has been stored for too long).

According to the normal start-up process, the engine may emit smoke for a short period of time (residual oil in the cylinder), which is a normal phenomenon and will disappear after running for 1 minute.

4. Maintain taboos and precautions

Do not use flammable solvents such as fuel or banana oil to clean components (such as air filters and machine bodies) to avoid causing fires.

It is prohibited to mix different brands and models of engine oil, and it is forbidden to use two-stroke engine oil or inferior engine oil (which can damage the engine).

When replacing spark plugs, the recommended model must be used and the tightening torque should not be too high (to avoid damaging the cylinder head threads).

When cleaning the air filter, do not twist or tear the foam filter element, and do not wash the paper primary filter with water (only air blowing).

After all maintenance operations, it is necessary to ensure that the components are securely installed and the screws are tightened to avoid detachment during operation.

Deep troubleshooting of common faults (including causes and solutions)

Possible causes of malfunction, troubleshooting steps, and solutions

Unable to start: 1. Battery is running low (electric start failure); 2. Insufficient or deteriorated fuel; 3. Spark plug malfunction (carbon buildup, improper clearance, moisture); 4. The fuel shut-off valve is not open; 5. Incorrect position of the air door (the air door of the refrigeration unit is not closed); 6. Low oil protection triggered; 7. The spark plug cap is not tightly inserted. 1. Check the battery voltage (≥ 12V), and charge or replace it if it is depleted; 2. Check the fuel gauge and add fresh fuel; 3. Remove the spark plug and check its condition; 4. Confirm that the fuel shut-off valve is in the "ON" position; 5. Close the air door of the cooling machine and open the heating machine; 6. Check the low oil alarm and replenish the engine oil; 7. Tighten the spark plug cap. 1. Charge or replace the battery; 2. Replace with fresh fuel; 3. Clean spark plugs, adjust clearances, air dry if damp, replace if damaged; 4. Open the fuel shut-off valve; 5. Adjust the position of the air door; 6. Add engine oil to the standard level; 7. Tighten the spark plug cap

Stop immediately after startup. 1. Low oil protection (insufficient engine oil); 2. Fuel pipeline blockage; 3. The load is not disconnected; 4. Blockage of carburetor; 5. Spark suppressors are blocked. 1. Check the low oil alarm and replenish the engine oil; 2. Check for blockages in the fuel filter and fuel pipes; 3. Confirm that all loads have been disconnected; 4. Clean the carburetor float; 5. Clean the spark suppressor filter. 1. Add engine oil; 2. Clean the fuel filter and unclog the fuel pipe; 3. Restart after disconnecting the load; 4. Disassemble and clean the carburetor (professional operation); 5. Clean the spark suppressor and replace it if it is damaged

Insufficient power/unstable speed during operation 1. Load exceeding the standard; 2. Insufficient fuel supply (clogged fuel filter, leaking fuel pipe); 3. Air filter blockage; 4. Spark plug carbon deposition; 5. The air door is not adjusted to the "OFF" position; 6. Poor fuel supply to carburetor. 1. Check if the total load exceeds 6000W. 2. Check if there are impurities in the fuel filter and if the fuel pipe is leaking; 3. Check the status of the air filter; 4. Clean the spark plug; 5. Adjust the air damper to a stable position; 6. Check the carburetor float oil level. 1. Reduce the load to the rated range; 2. Clean the fuel filter and repair the leaking oil pipe; 3. Clean or replace the air filter; 4. Clean or replace spark plugs; 5. Adjust the air door; 6. Clean the carburetor (professional operation)

No output voltage: 1. Circuit breaker tripped; 2. GFCI socket not reset; 3. Loose wiring or poor plug contact; 4. Internal winding failure of the generator; 5. Load short circuit triggering protection 1. Check if the control panel circuit breaker has tripped; 2. Press the "RESET" button on the GFCI socket; 3. Check if the output socket and wiring are loose; 4. Disconnect all loads, restart and test; 5. Check if the connected device is short circuited. 1. Reset the circuit breaker after checking for overload; 2. Reset the GFCI socket, if it still does not work, replace the socket; 3. Tighten the wiring and plugs; 4. If there is still no output, contact after-sales maintenance; 5. Replace faulty equipment