HY10000LEk-2 - Troubleshooting

Oil type - SAE15W40 -1100ml

The machine is shipped without oil and it must be added before use.

Fuel Capacity - 25L - Petrol

• Check fuel lines, tank, cap and fittings frequently for cracks or leaks. Replace as required.
• Do not mix oil with petrol.
• Once fueling has finished refit the fuel cap and fully tighten. Wipe up any spilled fuel before starting machine.

STARTING & STOPPING MACHINE

NEVER start or stop engine with electrical devices plugged into the power outlets and devices turned on. Unplug all electrical loads from the unit's power outlets, or make sure that the main breaker is OFF (down) position, before starting the engine.

• Starting the engine - Recoil start
• Press the engine switch to ON then to start position

• Turn the fuel tap to the ON position

• Move the engine choke lever to the START position.

• For recoil start, firmly grasp the recoil handle and pull slowly until increased resistance is felt.
  Then pull rapidly up and away
• When the engine starts, move choke lever to the ½ - choke position till engine runs smoothly and
  then to RUN position. If engine falters, move the choke lever back to½ - choke position until
  engine runs smoothly and then fully RUN position again.

Warning : When starting engine, pull cord slowly until resistance is felt and then pull rapidly to avoid kickback. NEVER wrap the starter cord around your hand. 

Note :

If engine fails to start after 3 pulls, or if unit shuts down during operation. Make sure the unit is on a flat level surface and check for proper oil level in crankcase. This engine is equipped with a low oil level protection device. 

For Electric Start 

• Press and hold the switch buttin at START position until the generator starts
• When the engine starts, move the choke lever to½ - choke position till engine
  runs smoothly and then to RUN position. If the engine falters, move the
  choke lever back to½ - choke position until engine runs smoothly and then
  fully RUN position again.

Important

DO NOT overload the generator. DO NOT overload individual output sockets.
These outlet sockets are protected against overload with push-to-reset-type circuit
breakers. If current rating of any circuit breaker is exceeded, that breaker will open and the electrical output to that socket will be lost.

MAINTENANCE

IMPORTANT

Once a year replace the spark plug and the air filter. A new spark plug and a clean air filter helps the engine run better and last longer.

• Use spark plug F6TC, BPR4ES or Champion RN14YC.
• Stop the engine and remove the HT lead from the spark plug.
• Clean the area around the spark plug and remove it from the cylinder head.
• Set the spark plug's gap to 0. 70-0.80 mm (0.028-0.031 in.). Install the
  correctly gapped spark plug into the cylinder head and torque to lSft/lbs.

Spark arrestor service

• Shut off generator and allow the engine and muffler to cool down completely before servicing spark arrestor (located on the back of the muffler)
• Remove the clamp and spark arrestor screen.
• Clean the spark arrestor screen with a small wire brush.
• Replace the spark arrestor if it is damaged.
• Refit the spark arrestor.

Air filter service

• Replace the air filter once a year. Clean or replace if operating under dusty conditions
• Remove air filter cover and remove sponge filter element.
• Wash filter element in soapy water. Squeeze filter dry in clean cloth ( do not twist)
• Clean air filter cover before re-installing it
• Put a drop of engine oil onto sponge filter element. This will help avoid ice blocking during winter season.

Valve clearances

• After the first 50 hours of operation, check the valve clearance in the engine and adjust if necessary.

General 

• The generator should be started at least once every seven days and be allowed to run for at least 30 minutes

Non Starting issues

• Check Fuel & Oil – Make sure there’s enough fresh petrol and oil at the proper levels.

1. Prime the Engine (if required) – Press the primer bulb 3–5 times to push fuel into the carburettor
2. Set the Choke (if applicable) – If your machine has a choke, set it to "start" or "closed" for cold starts.
3. Engage the Safety Lever – Hold down the safety lever (if your machine has one).
4. Pull the Starter Cord – Firmly grasp the pull cord and give it a quick, strong pull. Repeat as necessary.
5. Let It Warm Up – Let the engine run for a minute before
   mowing.

If your 4-stroke engine won’t start, here’s a step-by-step
troubleshooting guide to help diagnose and fix the issue.

Check the Basics

• Fuel: Ensure there’s fresh gasoline in the tank. Old or stale fuel can prevent the engine from starting.
• Oil Level: Check the oil level using the dipstick. Some machine have a safety feature that prevents starting if oil is too low.
• Safety Lever (Brake Handle): Make sure you're holding down the safety lever (if your machine has one) while pulling the starter cord.

Engage the Safety Lever – Hold down the safety lever
(if your machine has one).

Check the spark plug

• Remove & Inspect: Pull out the spark plug using a wrench. If it's dirty, corroded, or wet, clean it or replace it.
• Test for Spark: Reconnect the spark plug wire, ground it to the engine, and pull the starter cord—look for a spark.
  No spark? Replace the plug

Check the Air filter

• A clogged air filter can block airflow and prevent from starting
• Remove the air filter and inspect it. If it's dirty, clean or replace it

Check the carburettor and fuel system

• Prime the Engine – If your machine has a primer bulb, press it 3-5 times.
• Check for Fuel Flow – Disconnect the fuel line to see if fuel is flowing freely. If not, the fuel filter may be clogged
• Clean the Carburettor – If the machine sat for a long time, the carburettor may be gummed up. Try spraying carburettor cleaner or disassembling and cleaning it

Inspect the starter mechanism

• Pull Cord Issues – If the cord is stuck or loose, check if the recoil mechanism is jammed.
• Make sure the safety switch is on

Check Compression & Engine Issues

• If your machine has poor compression, it may need professional repair. Pull the starter cord—if it moves too easily with no resistance, internal engine damage could be the issue.

Try Starting Fluid (as a Last Resort)

• Remove the air filter and spray a small amount of starter fluid into the carburettor.
• Try starting the machine. If it runs for a few seconds and dies, the carburettor likely needs cleaning. dies, the carburettor likely needs cleaning.

A clogged air filter can block airflow and prevent
starting.A clogged air filter can block airflow and prevent

A clogged air filter can block airflow and prevent
starting.

Cleaning the Carburettor

Tools Needed : 

✅ Screwdrivers
✅ spanner set
✅ Carburettor cleaner
✅ Small brush or toothbrush
✅ Compressed air (optional)
✅ Container for draining fuel

Step 1: Preparation & Safety

1. Turn Off & Disconnect the Spark Plug – This prevents accidental starts.
2. Drain the Fuel (if necessary) – If the fuel is old or contaminated, drain it into a safe container.
3. Locate the Carburettor – It’s usually behind the air filter housing, attached to the fuel line and throttle linkage.

Step 2: Inspect the Carburettor without Removing It

Before removing, check:
✅ Fuel Flow – Disconnect the fuel line from the carburettor. If fuel doesn’t flow, the fuel filter or tank may be clogged

✅ Choke & Linkages – Ensure the choke plate and throttle linkages move freely.

Step 3: Remove the Carburettor

1. Remove the Air Filter Housing – Unscrew and take off the air filter and cover.

2. Disconnect Fuel Line – Use pliers to remove the fuel line clamp, then pull off the hose. Be ready for fuel to leak out.
3. Disconnect Throttle & Choke Linkages – Carefully unhook these metal rods.
4. Unscrew the Carburettor – Use a wrench to remove the mounting bolts and take off the carburettor.

Step 4: Clean the Carburettor
Quick Cleaning (If Not Removing the Bowl)

1. Spray carburettor cleaner into the intake and choke areas.
2. Use a small brush to remove dirt build-up.
3. Blow compressed air through any openings.

Deep Cleaning (If Carb is Fully Removed)
1. Remove the Carburettor Bowl – Unscrew the bottom bolt (be careful, fuel may spill).
2. Clean the Float & Needle Valve – Check that the float moves freely. Spray cleaner into the small jet openings.
3. Clear the Jets & Passages – Use a wire, needle, or compressed air to clear the tiny fuel jets.
4. Soak the Carburettor (Optional) – For heavy dirt build- up, soak in carb cleaner for 15-30 minutes.
5. Dry & Reassemble – Let all parts dry completely before
putting them back together.

Step 5: Reinstall & Test
1. Reattach the Carburettor – Bolt it back in place and reconnect the fuel line, throttle, and choke.
2. Reinstall the Air Filter – Secure the air filter housing.
3. Reconnect the Spark Plug & Add Fresh Fuel
4. Start the Engine test for smooth running.

Step 1: Check the Spark Plug
Tools Needed:

✅ Spark plug wrench
✅ new spark plug (if needed)
✅ Insulated gloves
✅ Spark plug tester (optional)

1. Remove the Spark Plug

1. Disconnect the Spark Plug Wire – Pull off the rubber boot from the spark plug.
2. Use a Spark Plug Wrench – Unscrew and remove the spark plug.

2. Inspect the Spark Plug

• Black & Sooty? → too much fuel or dirty plug; clean or replace it.
• Wet with Fuel? → Engine may be flooded; let it dry or replace it.
• Worn or Damaged? → Replace with a new one.

3. Test for Spark

Method 1: Using a Spark Plug Tester

1. Connect the spark tester between the plug wire and spark plug.
2. Pull the starter cord and watch for a visible spark inside the tester.

Method 2: Grounding the Spark Plug

1. Hold the metal threads of the spark plug against the engine block.
2. Pull the starter cord while looking for a blue/white spark at the electrode.
3. No Spark? → the ignition coil may need to be replaced

Step 2: Test & Replace the Ignition Coil

Tools Needed:
✅ Mustimeter (for testing resistance)
✅ Screwdrivers/Wrench Set
✅ Replacement ignition coil (if faulty)

1. Locate the Ignition Coil

• The coil pack is near the flywheel under the engine cover.
• It has a wire that connects to the spark plug.

2. Test the Ignition Coil

1. Set your mustimeter to ohms (Ω).
2. Test Primary Coil Resistance:

• Touch one probe to the metal terminal where the kill wire
  connects.
• Touch the other probe to the coil’s metal base.
• Resistance should be 0.3–1.0 ohms (check your machine manual).

3. Test Secondary Coil Resistance:

• Place one probe inside the spark plug boot.
• Place the other probe on the metal coil base.

4. No Reading or Out of Range? → Coil is bad and needs replacement.

• Remove the coil and reconnect it outside the machine.
• Place a spark tester on the spark plug wire and try starting the machine.
• No spark? → the coil is bad.

3. Replace the Ignition Coil

1. Remove the Engine Cover – Unscrew the bolts holding the cover.
2. Disconnect the Old Coil – Unplug the kill wire and remove the mounting bolts.
3. Install the New Coil 

• Position it over the flywheel magnets.
• Use a business card (or 0.010"–0.015" gap gauge) between the coil and flywheel.
• Tighten the mounting bolts, then remove the card.

4. Reconnect the Kill Wire & Spark Plug

5. Reassemble & Test the machine

Step 3: Final Testing

1. Pull the starter cord – the engine should spark and run properly.
2. If it still won’t start, double-check:

• The spark plug is correctly gapped and working.
• The ignition coil is installed properly.
• Fuel and carburettor issues aren’t causing the problem.

If you need any help, please send us an email to [e-mail] or call us on 01646 687 880 if you need assistance.