This lt2000 (917.273140) mower has a habit of flooding and dumping all the gas into the crankcase. It's especially bad since the tank is above the carb and it's a gravity feed system. It's the kohler command 17hp (cv490s-27508). I'll clean the carburetor, install the rebuild kit ( Oem Kohler, new needle valve and seat, etc) and it works fine for two or three months before it floods again. It has an inline fuel filter. What can I do to fix this for good (other than installing a shut-off valve for storage, which I'm going to do shortly). I've never come across a mower that has this issue so frequently. My plan is to rebuild the carb again, probably replace the float for good measure (plastic non adjustable), install a new filter and inline ****-off valve. The solenoid on the carb is just to prevent backfiring when you shut off a hot motor without throttling down right? I dont think it will totally stop fuel flow when popped up?
SSG
new hoses and tank flush maybe. You are correct about the anti-backfire solenoid. If flooding is minor the inline shutoff may be all you need. Could be enough fuel is used when running to keep bowl from overflow. Just about everyone who asks me to fix their mower get a shutoff valve. And some actually use it.
I haven't had any trouble on the ones I've changed the brass seat on. Thread on leaky LMKs. https://www.mytractorforum.com/44-s...192809-carburetor-rebuild-kohler-commander-%9D-kit-12-757-03-s-12-521-03-s.html I guess it's possible that you have a Nikki, one of my 15.5's does.
Cannon
Cannon
All you have to do is replace the needle valve and its seat..that is the only part(s) going bad on you....it seems to actually be a very common problem, but if it keeps recurring that quickly you can blame the fuel with ethanol ...if you can get ethanol free fuel in your area it is worth the extra$$$...but the fuel shut off valve on the line is really the only permanent fix as long as you remember to always use it
Also be sure to drain thoroughly the crankcase oil that has become diluted with the gasoline and put in fresh oil
Also be sure to drain thoroughly the crankcase oil that has become diluted with the gasoline and put in fresh oil
This one has the metal needle and rubber seat. I wonder if anyone makes a viton seat that will fit this carburetor? Ethanol may be part of the issue, but plenty of mowers will go for a few years without carb issues, even on ethanol gas. It's a bit puzzling to me since the last time it happened the carb was spotless inside. I've been changing the oil/filter, and flushing the crankcase each time, but it's getting annoying/expensive to have to do it every few months.
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