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Hope not! My CH22 is almost 30, and still going strong. Knock on wood, and lots of oil/filter changes.

Or maybe a defective oil filter that restricted flow? I'd drain and cut it apart to see.

Due to the fins' cleaning (a good thing), the engine is running cooler. So tolerances are likely smaller, which could explain the former "looseness" at shutdown. However, other driven devices/bearings outside the engine could have gone bad, so check them out.

E.g., did you use compressed air, through a nozzle?

Are you sure the oil level was correct before starting it the final time? {I check mine before each use.}

How old is the battery?

How old is the battery?

Battery need replacing? Terminals clean and tight? Cables in great shape?

Classic sound of running out of gas. I'll guess fuel pump. If a vacuum pump, replace its lines as well.

So ... new piston{s} (and rings; or milled head{s}) would be needed. So far, seems do-able. Conversion kits already available?

Seems like they would have already figured this out in Brazil, long ago. Anyone from there? Parece que eles já teriam descoberto isso no Brasil, há muito tempo. Alguém de lá?

If, someday, gasoline is banned or just isn't sold widely. They are already talking about such in California. Here (not anywhere near CA), ethanol (E85, E90) is already sold at one major gas station chain. So, besides gaskets and carb rejetting, anything else? Timing affected? Fuel filter...

Just wondering ... for the future. Anyone run straight (90%+) ethanol in their Kohler? What parts were needed for the conversion?

Fixed mine! Turned out to be the (previously replaced, but years ago) vacuum-powered fuel pump. And fortunately I had a new (cheap) pump on the shelf. But figuring out it was the pump took a while this morning. * Working on fuel is very dangerous, so leave it to professionals is my advice to...

My CH22 suffers from this too. One thing I did was to keep the fuel tank very full which decreases the pressure loss from the tank to the vacuum-driven fuel pump. I also learned that it did not like nonOEM fuel filters (too high a pressure loss?). The clear OEM filters, even before this...

If at all questionable, replace the battery. And charge it, of course! :-) Hopefully you have a low-amp charger, e.g., 1 to 2 amp? It is always better to slow-charge a lead acid battery.

How old's the battery? Check the condition of the cables, and clean and tighten its terminals. Be safe.

When it ran out of gas, did it quit gently, or were there backfires or bucking?

P.S. The old battery did die a few months later. New (same type) battery was cheap, from Walmart, so should have replaced it back then.

RE: Kohler CH22, horizontal shaft, 1995 vintage, in my Yardman 999 garden tractor Over the past couple of years, the engine has been stalling after about 1.5 gallons of gas has been used. From the tank's full-point, this stalling occurred when the fuel level lowered to about the carb's height...

They've given up the ghost, so to say. I have new ones on the shelf, but don't have the old front one nor the jackshaft out yet. This front PTO also powers the mower deck. I do have the rear bearing off (via the driveshaft's quick-release spring-fitting and the rear bearing's four-9/16...

First Post! Tried the Search function, but didn't quickly come up with the answer. Background: I'm an experienced mechanic (cars, ...), and have had this Yardman 999 since 1998 (MTD, but built by Kwik-Way). Runs/mows great, with maintenance. Has the original Kohler Command CH22 engine in it...