What to Review Annually: Basic RV Generator Maintenance Guide
Your RV generator is the heart of your power system when you’re off-grid, ensuring you have electricity for essential appliances and comforts on the road. Annual reviews and proper maintenance are crucial to keep it running smoothly and avoid unexpected breakdowns during your adventures. In this guide, we’ll break down what to review annually for your RV generator and provide step-by-step insights for maintaining it effectively.

1. Understanding Your RV Generator
Your RV generator provides 120V AC power to run appliances like air conditioners, microwaves, and TVs when shore power isn’t available. It uses fuel (gasoline, diesel, or propane) and works by converting mechanical energy into electrical energy. Regular annual reviews and maintenance ensure its reliability and prevent costly repairs.
Common Problems Due to Poor Maintenance:
- Hard starting or failure to start.
- Reduced power output.
- Overheating.
- Excessive noise or vibrations.
- Fuel or oil leaks.
Key Areas to Inspect Annually:
- Oil levels and quality.
- Air filters and spark plugs.
- Fuel systems and connections.
- Electrical components and wiring.
- General cleanliness and wear.
2. Annual RV Generator Maintenance Tasks
To ensure your generator remains in peak condition, follow these annual maintenance steps:
a. Inspect and Change the Oil
Why It’s Important: Oil lubricates the generator’s engine, reducing friction and preventing overheating. Over time, oil breaks down, affecting performance.
Steps to Maintain:
- Inspect oil levels using the dipstick and look for signs of contamination.
- Change the oil annually or after every 50-100 hours of operation, depending on usage.
- Dispose of old oil properly and replace it with the manufacturer-recommended type.
Learn more: How to Change RV Generator Oil

b. Replace the Air Filter
Why It’s Important: A clean air filter ensures optimal airflow, preventing engine damage from debris and dirt.
Steps to Maintain:
- Check the air filter during your annual review.
- Replace it if it shows signs of clogging, dirt buildup, or damage.
- Use the manufacturer-recommended air filter for your generator model.
c. Inspect and Replace the Spark Plug
Why It’s Important: The spark plug ignites the fuel-air mixture in the engine. A worn spark plug can lead to misfiring or starting issues.
Steps to Maintain:
- Remove the spark plug and inspect it for wear, corrosion, or cracks.
- Replace the spark plug annually or if it appears damaged.
- Check the spark plug gap and adjust it according to the manufacturer’s specifications before installation.

d. Fuel System Maintenance
Why It’s Important: Old or contaminated fuel can clog the fuel system, causing performance issues.
Steps to Maintain:
- Drain the fuel tank and replace old fuel with fresh fuel annually.
- Use a fuel stabilizer to prevent fuel degradation if the generator is stored for long periods.
- Clean the carburetor and fuel lines to ensure proper fuel flow.
Learn more: RV Fuel System Cleaning Guide
e. Check Electrical Connections
Why It’s Important: Loose or damaged electrical connections can lead to inconsistent power output and safety risks.
Steps to Maintain:
- Inspect wiring and terminals for signs of corrosion or fraying.
- Tighten loose connections and replace damaged wires.
- Test the generator’s output using a multimeter to ensure consistent voltage.
f. Clean and Inspect the Exterior
Why It’s Important: Dirt and debris can block cooling vents, leading to overheating.
Steps to Maintain:
- Wipe down the generator’s exterior with a soft cloth.
- Ensure cooling vents and intake areas are free of debris.
- Check for signs of rust or damage and address them promptly.

3. Troubleshooting Common Generator Problems
Generator Won’t Start
Causes: Low fuel, dead battery, clogged carburetor, or dirty spark plug.
Fixes: Check fuel levels, recharge or replace the battery, clean the carburetor, and inspect the spark plug.
Generator Runs Rough or Stalls
Causes: Dirty air filter, bad fuel, or loose connections.
Fixes: Replace the air filter, drain and refill with fresh fuel, and check all connections.
Overheating Generator
Causes: Blocked cooling vents or low oil levels.
Fixes: Clean vents, remove obstructions, and check oil levels.
More on this: RV Generator Troubleshooting Tips
4. Preventive Maintenance Tips for Long-Term Reliability
- Run the Generator Regularly: Start and run the generator under load for at least 30 minutes every month to prevent carburetor clogs and ensure proper operation.
- Store Properly: If storing your RV, drain the fuel system or use a stabilizer to protect against degradation.
- Schedule Annual Reviews: Use this guide as a checklist to review and maintain your generator every year.
- Follow Manufacturer Guidelines: Refer to the generator manual for specific maintenance schedules and parts replacement.
RV Generator Handbook PDF By PrimetimeRV – Download RV Generator Handbook
5. When to Seek Professional Help
If you notice persistent problems or safety concerns during your annual review, it’s best to consult an RV technician. Seek professional help for:
- Consistent starting issues.
- Unusual noises, smoke, or vibrations.
- Fuel or oil leaks.
- Electrical problems like power surges or inconsistent output.
Conclusion
Reviewing your RV generator annually is essential for safe and reliable performance. Regular oil changes, clean filters, and inspections can prevent major issues and ensure hassle-free adventures. By following this guide and maintaining a consistent review schedule, you’ll extend the life of your generator and enjoy peace of mind on the road.
What’s on your annual RV maintenance checklist? Share your tips in the comments below!