How to Winterize Your RV Generator

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How to Winterize Your RV Generator


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When you aren’t plugged into an influence pedestal, your RV’s generator is your most important AC energy supply. To maintain it operating effectively and maximize its lifespan, you’ll have to discover ways to winterize your RV generator. 

Of course, the precise process will depend on the make and mannequin of your generator. Begin by consulting your generator’s proprietor’s handbook or contacting the producer for generator winterization greatest practices. 

That stated, listed here are the explanations to winterize your generator and an summary of the best way to do it. 

Why Winterize Your RV Generator?

Here are a number of explanation why it’s good to winterize your RV generator if you aren’t utilizing it for an prolonged interval: 

  • Maximize your generator’s lifespan and effectivity.
  • Prevent gas varnish and deterioration.
  • Reduce corrosion of engine bearings and different parts. 
  • Prevent the necessity for dearer upkeep.
  • Avoid battery drain or unintended surge.  

When to Winterize Your RV Generator

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Photo by Camping World

You ought to winterize your generator if you don’t plan to run it for 30 days or extra, and there’s a powerful probability of freezing temperatures. This may be integrated into your bigger strategy of winterizing your RV every season. Here are another sources that can assist you shield your RV from freezing temperatures:

How to Winterize Your RV Generator

Here’s the best way to winterize your RV generator: 

Step 1: Fill the Fuel Tank

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Photo by Camping World

Your RV’s gas tank needs to be full at any time when your generator is idle for at least 30 days. With air house inside your gas tank, condensation can kind and result in rust and different points. It may also water down your gas, making it extra vulnerable to freezing temperatures. 

The sort of gas you utilize will depend on your generator’s producer. Diesel mills require diesel gas, LP mills require propane, and most gasoline mills may be stuffed with common or ethanol-blend gasoline, as long as it’s lower than 10% ethanol.

For diesel mills, your gas selection is particularly vital, as sure gas blends are designed for sure ambient temperatures. Your proprietor’s handbook is your information to selecting the best gas to make use of when winterizing your generator.

Many RV house owners empty their RV’s gas tank earlier than winterization. This ensures that you just’ll have contemporary gas (nothing greater than 30 days outdated) within the tank whereas your generator is resting.   

Step 2: Stabilize the Fuel Supply

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Photo by Camping World

Regular gasoline deteriorates over time, leading to a gummy substance that may clog your carburetor, gas filter, and gas pump. Non-ethanol fuels are extra secure than ethanol blends, making them the popular selection for items that aren’t used typically or that can be saved for some time.

Diesel gas gained’t varnish like common gasoline, however it will possibly develop into gel-like in chilly climate and be topic to algal progress. 

So, for gasoline (whatever the gas sort used) and diesel mills, you’ll want so as to add a gas stabilizer to your RV’s gas tank and run it by means of the engine when winterizing. Most producers will suggest particular stabilizers for his or her mills. 

Technician Tip: Once gas begins to varnish and deteriorate, it’s too late so as to add a stabilizer or preservative. If gas is unhealthy, disassemble your generator’s gas system parts, take away as a lot from the system as attainable, and eliminate it correctly. Then, use a gas system cleaner to take away the remaining contaminants. 

Step 3: Run the Generator

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Photo by Camping World

Now it’s time to start out your generator and run it for 30-60 minutes beneath load. Depending in your producer’s suggestion, it’s possible you’ll have to run your generator for extra time. 

For instance, Onan recommends operating your generator for half-hour plus one other two minutes for every foot of the gas line. 

This ensures your gas stabilizer runs by means of the complete line and all engine parts, lowering gasoline deterioration and polish and stopping seals from hardening in diesel and LP mills. It additionally retains oil and its protecting components distributed all through the engine, lowering put on.

Technician Tip: Running your generator ‘under load’ means turning on at the least one inside equipment, resembling your air conditioner

Step 4: Change the Oil and Filter

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Photo by Camping World

Once your gas stabilizer is run by means of the system, it’s a good suggestion to vary the engine oil and oil filter to stop acid accumulation that may corrode engine bearings. Again, you’ll have to seek the advice of your proprietor’s handbook for the right sort and quantity of engine oil, in addition to the right filter alternative. 

Technician Tip: Only use OEM (unique gear producer) elements for oil filters and really helpful engine oil. Generic or alternative elements are sometimes made with inferior supplies that may void any current warranties and lead to costly issues.  

Step 5: Prevent Engine Fogging and Check Electrical Connections

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Photo by Camping World

For gasoline mills, you need to take away the spark plug and apply a fogging spray to stop rust and condensation within the cylinder. 

For all mills, visually examine all wiring connections to make sure they’re safe and guarded. If crucial, clear battery cable connections and apply a lubricant to the linkage factors. 

Technician Tip: Only lubricate linkages if really helpful by your generator’s producer and make the most of the suitable lubricant based mostly on their suggestion.

Step 6: Disconnect the Battery

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Photo by Camping World

Your last step is disconnecting the battery’s floor terminal to the generator. This will forestall battery drain and shield the system from unintended surge in case your RV is plugged in for long-term storage. 

Technician Tip: Many producers may even suggest operating your generator at the least as soon as a month for at least half-hour beneath 50% load. 

Final Consideration

Many generator producers suggest a month-to-month run time for his or her items. Consult your working handbook to see how typically you’ll have to run your engine at regular working temperature and whether or not you’ll want so as to add extra gas stabilizer and high off the gas tank at these intervals. 

RV Generator FAQs

Beyond correct winterization, listed here are a number of extra ideas that can assist you function and preserve your generator. 

How do you select an RV generator?

The proper generator to your RV ought to deal with the load of your largest RV home equipment (usually your air-con unit). Still, the best RV generator to your setup might solely will let you run a few of your home equipment concurrently. 

Learn extra about how to decide on a generator to your RV on this video: 

Technician Tip: Any built-in or completely mounted generator have to be listed for RV use and put in in accordance with that itemizing.

How lengthy are you able to run an RV generator?

Most RV mills (built-in and transportable mills) can run for 8-24 hours. That requires they’re correctly ventilated, prepped for climate and temperature adjustments as wanted, and supplied with the right quantity of gas. 

Here are a number of extra ideas for the best way to function a generator: 

Can you permit your generator compartment closed whereas it’s operating?

RVs with built-in mills are designed to supply correct air flow to your generator when the compartment door is closed. Manufacturers really require the duvet or entry door to be closed when the generator is operating to stop injury to the generator or coach. 

Technician Tip: Keeping the compartment door to your built-in generator closed throughout operation prevents warmth and fumes from escaping to locations they aren’t presupposed to be.

On the opposite hand, transportable RV mills needs to be positioned at the least 25 ft out of your RV (and others). They also needs to be set on a non-flammable floor, resembling concrete, and related to a identified good earth floor – both everlasting or momentary, as said in your generator’s working handbook. 

Read our full article on generator security ideas. 


Add winterizing your RV’s generator to your seasonal guidelines to make sure it runs as effectively as attainable to your subsequent tenting season. Download Camping World’s Maintenance Handbook to trace your RV’s seasonal upkeep wants.

Do you’ve any questions on winterizing your RV generator? Let us know within the feedback under. 



Tucker Ballister is our Technical Content Writer. He’s a lover of the open street and the proud proprietor of a 2021 Sunlite Classic journey trailer (his third RV so far). Check out extra of his RV adventures, gear critiques, and outside recommendation at thebackpackguide.com.



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