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Bill_Diana's avatar
Bill_Diana
Explorer
Jun 22, 2019

Generator Help - Blue Smoke

The generator in my motorhome is 20 years old. It has been used infrequently and only has about 384 hours on the meter. It is a Kohler 5kw Confidant.

The good news first. The generator starts easily and runs smoothly. I'm able to put a large load on the generator and it does well producing electricity.

Now the bad news. The generator has a very small oil leak that I cannot detect the source because the generator is encased in a tight area with virtually no access. The more serious issue is the smoke coming out the exhaust pipe. What could be the cause of the exhaust smoke and how fixable would it be?

Thanks in advance for reading this post and I look forward to all ideas, suggestions & comments.

Bill
  • Bill,

    At 20 years and less than 400 hours, I can make two suggestions.

    The first and simplest is that the rings are gummed up. A couple of lube oil changes MAY fix that in about 50 running hours.

    The rest are not simple given the service resistant install.
    It may be that the valve guide seals have dried out or died. That is about the age that rubber parts start going bad all by themselves. The oil change may help this.

    Last and not a suggestion is that there is something actually wrong, like a cracked piston.

    I have seen these installed and they are not fun to work on.

    Matt

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