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Rich Biebel · 07-20-2020, 07:46 AM

Thousands of hours with proper maintenance.

The 5.5 and 7's are very similar. The 7 engine runs at a higher rpm to get more power.

I just serviced a 7 that has 8500hrs on it. Yes I have done some major work to it over the years but they can last a lot of hours.

You cannot change the oil too often and it has to have proper air flow for cooling or it will have problems....

07-20-2020, 07:46 AM	#2
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,275 Likes: 25 Liked 510 Times in 200 Posts	Re: Onan 5,500 Generator Thousands of hours with proper maintenance. The 5.5 and 7's are very similar. The 7 engine runs at a higher rpm to get more power. I just serviced a 7 that has 8500hrs on it. Yes I have done some major work to it over the years but they can last a lot of hours. You cannot change the oil too often and it has to have proper air flow for cooling or it will have problems.... __________________ Rich Biebel S/C 1479