Onan 4000 Generator Oil Change | Coachman Leprechaun 260 DS | RV Generator Oil Change

In this Video I change the Oil in My Onan 4000 Generator.
Leave comments below if you have any questions.

[@stevemalone2010]

Thanks, just refreshing my memory for my Onan, also a 26 Leprechaun

[@RMAGarage]

I just change the oil in mine and used this video for reference as well. Thanks for the comment.

[@barbaram4487]

I just purchased a 260DS Leprechaun so appreciate your videos. I’ve changed the oil in a portable generator but not this big. Thanks for sharing

[@RMAGarage]

Glad we were able to help. Thanks for commenting.

[@landrik_8179]

Great video, appreciate the effort. I'd add not replacing the metal cover drain plug until the end. After refilling with oil you can fire it up and check for leaks around the drain plug, then replace metal cover. Keep up the good work!

[@RMAGarage]

That is a very good Idea. Checking for leaks after startup. Thanks for the comment.

[@davenstorm7271]

​@RMA Garage Sir are you still using the rotella 15w40 ? I just went and bought some and there are some telling me not to use it in my generator cause its diesel oil. It's a 4000 onan just like yours on a 2020 coachmen Freelander 21QB motorhome .

[@RMAGarage]

@@davenstorm7271 I am sorry for not responding sooner....somehow I missed this..... The directions in the Onan manual say to 15W-40 in my climate zone. The oil says diesel on the bottle but it can be used with other equipment with the same viscosity. I did a lot of research on this.

[@davenstorm7271]

@RMAGarage I called Onan I asked about the 15W40 they told me to use 10W30 . They said that would cover temps 0 to 100 degrees . So I don't know what to do .

[@RMAGarage]

Thanks for the tip....and the encouragement.

[@billgatti6458]

thanks I knew I keep forgetting to do something. so I went out and got it done. I did notice you did not mention to clean the air filter

[@RMAGarage]

Bill, you are absolutely right. I should have mentioned checking the air cleaner.

[@davenstorm7271]

How do you clean the filter on these ?

[@robertallen6710]

@@davenstorm7271 You don't. You replace for cheap.

[@jerrybaumert2394]

Love your videos - we'er newbies and love your modifications - saw your video on the plywood in the basement - do you have a video on how you removed the luan and replaced with plywwood.

[@RMAGarage]

I do not have a video. I will cover this in future episodes with more detailed information.

[@brianbankston]

Hi RMA Garage, Thank you for the video. It was very helpful! I'm about to take care of this maintenance on my Onan 4000 generator. Is there no oil filter that needs to be changed with the oil?

[@RMAGarage]

You are correct. No oil filter. Thanks for the question.

[@tomkeilman8066]

would be nice to see your opinion on checking oil level after you changed. You mentioned that the oil level was right to the top of the fill opening. It seems like that would be too full? Do you check oil level with the dipstick screwed all the way in? or with it at the end of the threads. Every lawn mower I had says to check oil level from the end of the threads, with the dipstick not screwed all the way in. Not sure of Onan is that way. Comments?

[@RMAGarage]

Thanks for the comment. I have changed the oil many times and it always was right near the end of the fill opening but not all the way up. I guess in my world if you can see the oil in the fill opening, it's closer than other engines. It is strange Onan does this but it works. I check the oil by not screwing it in. I have checked it that way every time with no issues.

[@davenstorm7271]

Hows your generator doing you still using the Rotella 15w40 diesel oil in it ? I just bought some for mine realky concerned about using it , just bought the motorhome in Feb !

[@RMAGarage]

Ours is holding up fine. No issues. Been using it for several years now.

[@lordnetsplits3192]

Are there any oils for use in desert temps of 103 - 110

[@RMAGarage]

I checked my manual and their recommendation for temps up to 100 degrees and that is 15W-40 (Onamax) brand. They do reference a range from 32 degrees F and higher and that they say to SAE 30 (Onamax) Brand. But the manual just says higher. I do not know how high above 100 degrees F. I know this is not definitive, but its the best info I have.

[@douglaskarpf481]

where did you get your generator exhaust pipe with the muffler?

[@RMAGarage]

Doug, We added the resonator (www.rvupgradestore.com/Exhaust-Resonator-p/55-1669.htm). We bought the resonator and contacted our local weld shop to cut the exhaust and weld the resonator on. Thank I painted the exhaust with VHT header paint (www.vhtpaint.com/high-heat/vht-flameproof-coating). I bought the paint at the local auto parts store. Hope this helps.

[@TD-se5lc]

Do feel the resonator reduced the noise level ? Was it worth the effort? BTW, The exhaust looks great.

[@amywashington4669]

Do you have to do things like this or can I get it paid for? How many things do I need to do.. I bought an rv and you and the things you do are scaring me ..

[@RMAGarage]

You do not have to do these things yourself. You can take your RV back to the dealer to do most maintenance items. You might be able to find a general mechanic to perform the work as well. No worries. (2 Timothy 1:7-KJV). Thanks for the comment.

[@howardmoses6280]

To much oil

[@RMAGarage]

The book says 1.6 quarts???