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Old 08-01-2013, 01:00 PM   #1
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Generac 8kw Standby in the winter?


I had a Generac 8kw generator installed about 4 months ago, and have some maintenance questions:

1) Generac says to have the valves inspected after 6 months. The installer says that is silly; if it is running properly the valves don't need to be inspected.
2) Generac ships with 30 oil, good to 32*; we get to 0* rarely. Generac says that synthetic 5w-30 is good from 0* to 100*. Seems to me that I need the oil changed.
The installer says it is not necessary until 1 year.
3) Although it is not mentioned in the installation manual, Generac has a cold weather kit that warms the battery. Installer says it is not necessary.

Any opinions here?
Oil change?
Battery heater?
Nothing?
New guy to service my generator?

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Old 08-01-2013, 01:28 PM   #2
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Generac 8kw Standby in the winter?


If you have a warranty then you should have the valves "inspected." I'm assuming they check the clearances. You can always make a determination at that point as to how often you want to do it.

At some point, change the oil to the synthetic 5w-30. I'd run it a while though, to break it in before changing. The idea is to get any metals/debris from manufacturing out of the engine. When does the manual recommend the first oil change? I'd probably run it at about 25 hours.

I don't agree with your installer on the valves or the oil. I do agree that you don't need the battery heater. 0 is not that cold, especially as the battery is on a maintainer all the time, correct?

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Old 08-01-2013, 01:51 PM   #3
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Generac 8kw Standby in the winter?


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Originally Posted by AandPDan View Post
If you have a warranty then you should have the valves "inspected." I'm assuming they check the clearances. You can always make a determination at that point as to how often you want to do it.

At some point, change the oil to the synthetic 5w-30. I'd run it a while though, to break it in before changing. The idea is to get any metals/debris from manufacturing out of the engine. When does the manual recommend the first oil change? I'd probably run it at about 25 hours.
They don't require a break in. First oil change is at 2 years or 200 hours.
Quote:
I don't agree with your installer on the valves or the oil. I do agree that you don't need the battery heater. 0 is not that cold, especially as the battery is on a maintainer all the time, correct?
Battery has a maintainer, and the generator runs for 12 minutes every week.
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Old 08-01-2013, 07:11 PM   #4
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Generac 8kw Standby in the winter?


I had a 10kw Generac and it is still working well after 10 years. One thing to use caution with on the oil change, they give some odd volume like 2 and 2/3 quarts. Measure this, don't guess. I overfilled mine and it caused a big problem. Those little air cooled engines are kind of sensitive to their oil level.

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Old 08-01-2013, 07:57 PM   #5
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Generac 8kw Standby in the winter?


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They don't require a break in. First oil change is at 2 years or 200 hours.
Are you sure? I think my 17 recommended the first change at 8 hours. It is when I did it and that is when I put the synthetic 5W-30 in. Use that year round. It is 13 months old now and has run about 150 hours since that change. I plan on changing it every fall as part of fall cleanup even if I don't hit the 200 hours. That way I shouldn't have to worry about changing the oil in the middle of an extended outage.
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Old 08-01-2013, 08:00 PM   #6
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Generac 8kw Standby in the winter?


Oil change and other services follow the manufacturers recommendation while under warranty.

Cold weather kit not needed.

IMHO.
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Old 08-01-2013, 08:06 PM   #7
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Generac 8kw Standby in the winter?


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Originally Posted by Toller View Post
They don't require a break in. First oil change is at 2 years or 200 hours.
Good practice is to change it out after you've put a few hours on it, again, to get any manufacturing debris out. It shouldn't have any effect on your warranty changing it earlier than required.

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Battery has a maintainer, and the generator runs for 12 minutes every week.
Great, don't worry about the battery getting "cold."
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Old 08-01-2013, 10:02 PM   #8
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Generac 8kw Standby in the winter?


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Originally Posted by herdfan View Post
Are you sure? I think my 17 recommended the first change at 8 hours. It is when I did it and that is when I put the synthetic 5W-30 in. Use that year round.
It definitely doesn't require a break in. I think they changed it in 2010.
But of course putting 5w-30 in will be an oil change anyhow.

I spoke to the installer, who has 100s of installations. He says he has never inspected the valves at 6 months or changed the oil out before winter from the 30 it comes with; and has never had a problem.
I am willing to pay him, so he must be sincere to turn down work; but that doesn't make him right. It is frustrating.


Last edited by Toller; 08-01-2013 at 10:07 PM.
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