How to Maintain a Gentrax Inverter Generator

Gentrax inverter generators are known for their reliability, fuel efficiency, and quiet operation—perfect for camping, caravanning, or backup power. Regular maintenance ensures your Gentrax generator stays in top working condition and lasts for years. Here’s a step-by-step guide to keep your unit running smoothly.

? Maintenance Checklist (Quick Summary)

✅ 1. Before Each Use

• Check Oil Level: Use the dipstick. Top up with SAE 10W-30 if low.

• Inspect Air Filter: Ensure it’s clean and dry.

• Look for Leaks: Fuel or oil leaks can indicate worn seals or loose connections.

• Fuel Level: Always use fresh unleaded petrol (91 RON or higher).

?️ 2. Oil Change

Tools Needed:

• Oil tray

• SAE 10W-30 oil

• Funnel

• Rag

Steps:

1. Warm up the generator for a few minutes.

2. Turn it off and place it on a level surface.

3. Remove the oil filler cap and tilt the unit to drain into a tray.

4. Replace with fresh oil using a funnel (check user manual for capacity).

5. Refit cap and wipe excess oil.

Tip: Dispose of used oil responsibly at your local recycling centre.

?️ 3. Air Filter Cleaning

Steps:

1. Open the air filter cover (usually on the side).

2. Remove the foam filter element.

3. Wash in warm soapy water, then dry completely.

4. Lightly oil the filter with engine oil and squeeze out the excess.

5. Reinstall and secure the cover.

? 4. Spark Plug Check

Steps:

1. Remove the spark plug cap and use a wrench to unscrew the plug.

2. Inspect for carbon buildup or damage.

3. Clean gently with a wire brush.

4. Check the gap (typically 0.6–0.7 mm) and adjust if needed.

5. Reinstall carefully and tighten.

Note: Replace the spark plug if it's heavily worn or damaged.

⛽ 5. Fuel System Maintenance

• Avoid stale fuel by emptying the tank if the generator won’t be used for over 30 days.

• Use fuel stabiliser if storing with fuel.

• Clean the fuel filter and tank every 6 months.

? 6. Spark Arrester Cleaning (If Equipped)

1. Let the muffler cool down.

2. Remove the spark arrester cover.

3. Use a wire brush to clean carbon deposits.

4. Refit securely.

? 7. General Cleaning & Storage

• Wipe down the exterior with a damp cloth—no hose or pressure washer.

• Store in a dry, dust-free area, ideally with a cover.

• Disconnect the spark plug wire if storing long-term.

⚠️ Safety Reminders

• Always turn off the generator and disconnect all loads before performing maintenance.

• Work in a well-ventilated area, away from flammable materials.

• Use only genuine Gentrax parts for replacements.

? Recommended Spare Parts

• Engine oil (SAE 10W-30)

• Spark plug (NGK CR5HSB or equivalent)

• Air filter foam

• Fuel stabiliser

• Maintenance toolkit

Keeping up with regular maintenance will ensure your Gentrax inverter generator stays dependable whether you're powering a campsite, tools, or your home during an outage.