Some of you have responded to a couple of threads I have made about my Countyline 25-ton with Kohler 265 6.5hp motor... I replaced the carb with one off Amazon. Then that failed and I got another clone barb off Amazon, buying this one because it appeared from pics to be an exact match. In-hand use verified that it looks identical. Both cost $18 to $20. Now this second carb has 'failed.' It appeared to be a fix and it ran great for several hours yesterday. The first carb replacement ran for a few days about a week ago. The 'fail' is that after running for days or hours, as reported above, the motor started missing badly and even totally went dead. This morning, I replaced the spark plug. It fired right up and ran like a top. For about five minutes, when it just went suddenly dead. From full throttle to it just quit. My theory or idea was that I was suspecting the coil. I thought I might could get it going this morning and maybe it would run a few hours? And go dead. Wondering if this could be a coil going bad? Like, it gets heated up and the motor goes dead. But this morning, as I said, I only got less than five minutes out of it, making a few splits. Now, I was also suspecting maybe water in the fuel. I use non-ethanol fuel but I thought maybe it's condensation? Weather has been sporadic temps, crazy mix of warm/cool days/nights. I found no water in the gas after eyeballing it with a clear fuel/water tube/container that I bought for testing water in your fuel. So, just wondering if this might not be a carb thing at all and could be the coil failing? Thanks for your ideas as you guys know a lot more than me about motors. It seems weird to me that these carbs are giving the same type problem. If I were to buy another carb (doubting that!), I would buy a genuine OEM Kohler carb for $55.
when it dies, pull the plug wire off, stick something metal up in the plug wire and ground it against the block. Try and start and see what the spark looks like coming off that metal you jammed up in there. It should be a nice blue spark, if not, than replace the coil.
Another thought that I would probably look at is the low oil shut off sensor. At least if the coil checks out, I'd look at that next.
You’re reading my mind except I thought it was an oil temp shut off. Regardless, I had one go out on my splitter. It’s a normally open switch so I just disconnected it leaving the circuit open all the time. One of these days I’ll get around to finding a replacement.
The last time this was discussed, I recall learning that my Kohler does not have an oil shutoff gizmo. I will stand corrected if wrong.
Looks like the chinese knockoff coils are even less $ than their carbs...might as well try a couple of them too. On some engines the knockoff coils seem fine, on some they are just a soon and coming headache...I have no idea which these would be.
I see OEM coil for $42. This looks OEM. The part that plugs onto my spark plug, it's like a steel clamshell gizmo and I assume it protects the part from engine heat. I do NOT like it because it's hard to get off and I have broken two spark plugs over the years. Maybe there is a recommended technique, lol. A friend of mine broke one, too; that makes three! Chinese clone coils are less than $20 but some say "Assembly Type A" or "Assembly Type B." I have no idea what that means.
Your kohler should have one. IF it doesn't than you should find out why it doesn't. Was it a return and someone removed it? Was it forgotten when assembled? All sh265's should have this gizmo. SH265 | SH Series | KOHLER Automatic engine protection - Oil Sentry™ shuts down the engine in low-oil conditions
I didn't find a low oil switch on the parts list (if I had the right one) but there were a couple parts that were shown (but not described) that said "optional", so maybe that's it?
My manual (as does the PDF linked above, both on pg. 6) has a mention of "Oil Sentry" and it is styled as "Oil Sentry (If equipped)." Hmmm... I am certainly glad you posted, as I would not have known! But I think mine *does* have an Oil Sentry. When I bought one of the replacement carburetors I installed, one of them had some extra parts. Some of them, I do not know what they are. One looks like a fuel filter. And one is a switch. When I google "oil sentry" I see an image of a switch with two wire leads. And I *do* see a switch like this on my Kohler, it is withiwn a couple of inches of the red on/off switch. Now, yesterday, I filled up the oil. But it was near over-flowing anyway. I didn't think the oil was low, but I topped it off anyway. Didn't make any difference. But now I note that I have been checking the oil from the oil fill hole, which has a dipstick. But the other oil hole on the other side of the motor has a dipstick, too, and the manual says *that* one is the dipstick. So, I will check oil level there now. So, I need to know if my coil is bad and if my Oil Sentry is bad, if what I am looking at is Oil Sentry switch. Screwloose I have a multi-meter, is that what you mean?
Just unplug that switch when the engine dies...see if it will run then...if it does then the switch is malfunctioning (assuming the oil is full and the splitter is on level ground)
Well, heck, I cranked it, fired right up. Ran only about 1 minute and just died. I disconnected a wire (I think it was the green wire) on what I assume is the Oil Sentry low oil shutoff gizmo. Cranked right up and ran exceptionally smooth and I'm loving it. Split a round and is running a bit better than lately (when it's running) and I sure thought I had it. Nope, five minutes in, sputtered a time or two, and died.
Here is what the part is supposed to look like. KOHLER 17 099 09-S - SWITCH, OIL SENSOR ASSEMBLY (Authentic OEM Part) But I think you've confirmed it isn't the low oil shutoff. Are you getting a spark still when it dies?
I just went out and it cranked right up again. I ran it for 17 minutes this time and it performed perfectly. What! The gizmo that I thought was the Oil Sentry shutoff does not look like what you posted. Mine looks like... an "Oil Alert Unit Control" as shown on eReplacementparts.com -- https://www.ereplacementparts.com/control-oil-alert-unit-p-1779748.html. They get $74 for that? Sheesh, glad I got one for free with the carb. Anyway, beats me why it ran perfectly this time for 17 minutes. Will try again when I get another time break.
Just FYI, if you look on page 28 of the manual they show step by step how to test the ignition and oil sentry system http://www.kohlerengines.com/engines/onlinecatalog/pdf/18_690_01_EN.pdf
I'm sure glad you posted that, I did not get a Service Manual with my purchase; I only got the Countyline 25-ton splitter manual and the Kohler sh2565 Owner's Manual! I will check that out!
