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......