The Complete Onan Generator Repair and Maintenance Guide

Having a generator on your RV allows you to power appliances and electronics when you don't have access to shore power. Regular maintenance is crucial to keeping your Onan RV generator running smoothly and preventing potential problems down the road. Here are the most important tips on general maintenance tasks to perform for Onan generator repair.

How to Keep Your Onan Generator Running Smoothly

Follow these tips to keep your Onan RV generator in top working condition:

●    Check the oil level regularly and top it off as needed. Low oil can cause serious engine damage.

●    Change the oil and filter at the recommended intervals. This prevents the buildup of sludge.

●    Inspect and replace the air filter as needed. A dirty filter can restrict airflow.

●    Check for leaks and fix any that are found. Leaks can lead to overheating problems.

●    Make sure the generator is properly ventilated when running.

●    Listen for any odd noises or vibrations that may indicate an issue.

●    Clean the exterior to prevent dirt buildup that could clog components.

●    Always have a certified RV technician perform more complex maintenance and repairs.

General Onan Generator Maintenance

The key maintenance tasks for an Onan RV generator include:

●    Change oil and filter: This should be done every 100-150 hours of running time, at minimum annually. Use oil viscosity based on the outside air temperature.

●    Inspect/replace air filter: Check filters every 50 hours and replace as needed. Clogged filters reduce performance.

●    Check belt tension: The drive belt should have proper tension to work correctly. Adjust per manufacturer specifications.

●    Inspect fuel lines/replace fuel filter: Look for cracking or loose connections and replace fuel filters annually.

●    Clean spark arrestor: Prevent buildup of soot that can affect performance and ventilation.

●    Inspect starting battery: Check terminals are clean/tight. The battery must be properly charged to start the generator.

Changing the Oil for Your Onan RV Generator

Here are the steps to safely change the oil on your Onan generator:

Run the Generator for a Short Period

Run the generator for 5-10 minutes before changing the oil. This warms the oil so it drains better.

Remove the Panel Over the Oil Drain Plug

Refer to your owner's manual for the drain plug location. Remove the access panel or cover to access the oil drain plug.

Remove the Plug and Drain the Tank

Place an oil pan under the drain plug. Use a wrench to remove the plug and allow the oil to fully drain out.

Reinstall Drain Plug

Once drained, replace the drain plug and tighten securely. Replace the access cover.

Fill the Generator with Oil

Refill with the recommended type and amount of oil based on the generator model. Replace oil cap when full.

Run and Check for Leaks

Start the generator and let it run for a minute. Turn off and check for any leaks at the drain plug. Fix leaks if found.

Change the Generator Oil Filter When Necessary

The oil filter should be replaced at every other oil change, or around every 200-300 hours of running time. Always use a filter specified for your Onan generator model. Refer to your owner's manual for full details on maintenance schedules and procedures. Proper care will keep your generator running reliably when you need it.

Replacing the Air Filter in Your Onan RV Generator

A clogged air filter can reduce airflow and the generator's performance. Follow these steps to replace it:

1. Locate the air filter housing which is typically behind an access panel.
2. Remove the housing cover and take out the old filter.
3. Inspect the new filter and housing for any obstructions.
4. Insert the new air filter, making sure it fits snugly in place.
5. Replace the air filter cover and secure all access panels.
6. Replace air filters every 50-100 hours of generator run time. Use a filter specifically made for your Onan generator model.

How to Clean an Onan RV Generator Spark Arrestor

The spark arrestor prevents hot exhaust from exiting the generator. Over time, soot builds up and should be cleaned:

1. Allow the generator to cool completely before servicing the spark arrestor.
2. Remove the tailpipe exhaust port cover.
3. Use a wire brush to scrub the spark arrestor screen inside the tailpipe.
4. Clear all dirt and debris clogging the screen.
5. Replace the tailpipe cover when finished.
6. Clean the spark arrestor every 100-300 hours of running time as needed. Let the system fully dry before restarting.

How to Find the Right Shop for Onan RV Generator Repair

Look for an RV service center that:

●    Specializes in Onan generators with factory trained technicians.

●    Has extensive experience servicing and repairing Onan generators specifically.

●    Offers a warranty on parts and services.

●    Has a good reputation and references from past RV owners.

●    Provides fair pricing and upfront estimates.

●    Can offer timely service appointments.

●    Only use original manufacturer parts to ensure proper operation and compliance.

Contact Mainline RV & Truck Service for Onan Generator Repairs

For expert generator maintenance, repairs, or installation, contact Mainline RV & Truck Service. Our factory trained technicians have years of experience servicing Onan RV generators. We offer quick turnaround, fair pricing, and a warranty on all Onan generator repairs. Contact us today to schedule service or get a free estimate for your Onan RV generator repairs.