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post #1 of 20 Old 08-26-2019, 09:21 PM Thread Starter
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Kohler shutdown sequence

I ran my '80 8122 for the first time since buying it last autumn. (It needed repairs and maintenance.) It is my first and only running Kohler powered tractor. It has a Kohler K301 with a stock mechanical fuel pump. I run non-ethanol premium with Sea Foam. Should I run the carb dry to stop it, like I do on all my gravity fed machines, or should I just turn off the key and then turn off the gas as a precaution?

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post #2 of 20 Old 08-26-2019, 10:01 PM
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Re: Kohler shutdown sequence

If the tank doesn't gravity feed just bring it to a low idle and shut it off.
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post #3 of 20 Old 08-26-2019, 10:14 PM
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Re: Kohler shutdown sequence

My K301 likes to be idled for awhile before shutting down, otherwise it backfires very faithfully. "Gravity fed" tank, although the tank's outlet is lower than the carb IIRC, with mechanical pulse pump mounted on the engine.

Someone's signature on this forum (don't recall who) says "it's a Kohler. It's supposed to backfire." Don't know if that a K series or not, but it holds true for mine if I don't idle it down. Been that way since brand new in '86.


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post #4 of 20 Old 08-27-2019, 12:32 AM
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Re: Kohler shutdown sequence

I have found backfires can blow the crankshaft seals out and destroy mufflers. No full throttle shut downs here with the Kohler K or M's. Always at idle.
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post #5 of 20 Old 08-27-2019, 10:35 AM
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Re: Kohler shutdown sequence

I dont do anything special with my k301 powered 5665 2 wheeler except shut the fuel off at the tank, mainly because I dont use the machine a lot.

I think running the system dry and letting it sit for an extended period can invite fuel pump issues in my experience with a k181t.

With ethanol gas it's going to evaporate in the fuel line anyway.



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post #6 of 20 Old 08-30-2019, 08:55 AM
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Re: Kohler shutdown sequence

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Originally Posted by PA RedRider View Post
I dont do anything special with my k301 powered 5665 2 wheeler except shut the fuel off at the tank, mainly because I dont use the machine a lot.

I think running the system dry and letting it sit for an extended period can invite fuel pump issues in my experience with a k181t.

With ethanol gas it's going to evaporate in the fuel line anyway.



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Yep, and when the ethanol fuel evaporates, it leaves a sticky gum behind that clogs and sticks everything in the fuel system. The worst thing you can do to a small engine is run ethanol fuel in it and then let it sit.

The original poster is running non-ethanol fuel, so he has choices. If you guys think he should not run it dry he probably will be ok to let it sit full, though I would turn the fuel supply off.
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post #7 of 20 Old 08-31-2019, 08:59 AM
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Re: Kohler shutdown sequence

Once again I will share my experience.

In 1996 I purchased a brand new GRAVELY 16G with a Kohler M18 twin.

My 1995 production 16G has a plastic top feed siphon fuel tank and no fuel shut off, so I have never run it dry to stop or store it.

I ALWAYS let it come to a smooth idle before shutting it down, it will BACKFIRE otherwise.

For 23 years now the tractor has been run only on BP/AMOCO premium or SUNOCO premium fuel.

The tractor has seen a total of about 800 hours of service and is used to cut grass and plow/blow snow.

Here in the Mid Atlantic some winters have little snow, the tractor may sit for months.

I have replaced as few fuel pumps, and about 3 years ago I replaced the carb, but I have only had one performance "event" that I could attribute to bad fuel.

It starts every time with no issues, it runs fine. Several years ago I pulled the heads and decarboned them, the cylinder walls were like new. Before doing that I did have some rough running at mid throttle, I also started adding Marvel Mystery Oil to the fuel. Roughness went away.

I change the oil every spring and fall regardless of hours, I use only SAE30 oil, as my indoor storage means no really cold startups even in winter.

Ethanol or not, the quality of fuel additives makes a difference, better brands have better additives, junk that comes up the pipeline and sold at Wawa has who knows what for additives. BP and SUNOCO do not use the pipeline and put in all the additives at the refinery. Better quality control, better additives. Premium generally has less Ethanol.

In my hot rod days it was considered a death spell to a carburetor to run it dry and let it sit. Of course these machines were not designed to just "sit", they were designed to run. Even 10 minutes of occasional run time will prevent lots of problems.

But I only have the one tractor, not a museum fleet that sits idle.

OK, now I'm off to cut the lawn......

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post #8 of 20 Old 08-31-2019, 12:16 PM
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Re: Kohler shutdown sequence

I don't know of it's true, but I have heard that premium fuel may not have ethanol in it.
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post #9 of 20 Old 08-31-2019, 02:32 PM
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Re: Kohler shutdown sequence

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Originally Posted by franklin2 View Post
I don't know of it's true, but I have heard that premium fuel may not have ethanol in it.


I think that virtually all premium does have ethanol in it. Itís required by law. I can smell the difference in ethanol free and 10% ethanol fuel. There is a website and an app, PureGas.org, (or something like that) that lists stations with ethanol free fuel. Itís allowed to be sold to the general public for boats, motorcycles, and lawn equipment, (with the exception of California) since sitting for long periods of time, allows phase separation to occur, and the subsequent fouling of the carbs.
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post #10 of 20 Old 08-31-2019, 04:03 PM
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Re: Kohler shutdown sequence

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Originally Posted by ultane View Post
I think that virtually all premium does have ethanol in it. Itís required by law. I can smell the difference in ethanol free and 10% ethanol fuel. There is a website and an app, PureGas.org, (or something like that) that lists stations with ethanol free fuel. Itís allowed to be sold to the general public for boats, motorcycles, and lawn equipment, (with the exception of California) since sitting for long periods of time, allows phase separation to occur, and the subsequent fouling of the carbs.
From what I understand, it varies by brand and contains less ethanol in most cases, more like 5-8% rather than 10%.

And my experience suggests that better quality proprietary additives offset the ethanol problems considerably.

I never winterize my tractor because it plows snow, but sometimes very little snow. It starts right up every time, sometimes after sitting for a month or more in winter.

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post #11 of 20 Old 08-31-2019, 05:01 PM
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Re: Kohler shutdown sequence

Quote:
Originally Posted by ultane View Post
I think that virtually all premium does have ethanol in it. Itís required by law. I can smell the difference in ethanol free and 10% ethanol fuel. There is a website and an app, PureGas.org, (or something like that) that lists stations with ethanol free fuel. Itís allowed to be sold to the general public for boats, motorcycles, and lawn equipment, (with the exception of California) since sitting for long periods of time, allows phase separation to occur, and the subsequent fouling of the carbs.
Depends on where you are. It's my understanding different states have different rules, and certainly here in Canada getting premium fuel that at least is claimed to not have ethanol is readily available (well, at least here in Alberta).
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post #12 of 20 Old 09-01-2019, 01:45 AM
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Re: Kohler shutdown sequence

Should use fuel stabilizer like Sta Bil in it if it sits for any length of time and leave the bowl full and wet but you can turn the valve off after you shut it down to avoid any fuel leakage or oil dilution that can happen on older ones.
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post #13 of 20 Old 09-01-2019, 08:23 AM
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Re: Kohler shutdown sequence

Yep, depends where you are. In south central PA I can get mid grade fairly easily with no ethanol, but I don't really have a use for it. I only have one source of ethanol free premium, that goes in my dirt bikes. I can get ethanol free regular from the same place, that's what goes in my lawn equipment and street bike.
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post #14 of 20 Old 09-01-2019, 09:57 AM
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Re: Kohler shutdown sequence

Sorry to hijack the thread, but what is your source of ethanol-free gas in this part of PA? I am in Carlisle, and have not found a very convenient source yet.

Thanks,

Jim
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post #15 of 20 Old 09-01-2019, 10:24 AM
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Re: Kohler shutdown sequence

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Originally Posted by larryblue97 View Post
Sorry to hijack the thread, but what is your source of ethanol-free gas in this part of PA? I am in Carlisle, and have not found a very convenient source yet.

Thanks,

Jim
Until recently it was called Hakes. Now it's Dottie's Family Market gas station, they're still selling ethanol free gas.

898 E Canal Rd
Dover, PA 17315


https://www.gasbuddy.com/Station/123066
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