Kohler Cv14s Carb Issues?


Old 06-11-07, 02:14 PM
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Kohler Cv14s Carb Issues?

I have a snapper lt14h33 riding mower and have had it for 5 years and its had this problem all along. If it is above 1/2 tank of gas it runs great but if it gets below 1/2 tank it will not run it acts like it is out of gas. I have put a new tank and cap on it and still does the same thing. There is no mech fuel pump on it either. Any suggestions would be great. I also have one more prob with it I had to put a fuel shut off on it because the motor will fill itself with gas. They matbe related I don't know. Thanks for any input. frankp
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Old 06-11-07, 05:12 PM
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The issue with your engine filling with fuel is a problem that still needs dealt with. Most likely your needle valve is not shutting off fuel to the carb when the bowl is full. This includes while its running. If you are not burning more fuel than what will flow, chances are you still are dilluting your engine oil which will burn up the engine in short time. It could be debris, corosion, bad float, or needle/seat.
The other problem I would think more to due with the routing of your fuel line or possible restriction.
Old 06-11-07, 06:31 PM
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I've looked at the break-down of your machine and cannot decipher where, exactly, the fuel tank is in relation, elevation wise, to the carburetor but believe that it is below the seat. Is it? Are you sure there is no fuel pump? When you follow the fuel line from the fuel tank to the carburertor, are you sure there is no pump in between? The inline fuel shut-off is merely a band-aid and you need to remove, soak & recondition and install a Kohler rebuild kit and new intake gaskets, as required.
Old 06-12-07, 09:59 AM
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The gas tank is mounted right under the hood just in front of the steering wheel. Yes the motor will fill up with gas but I just shut the valve off and let it run out of fuel in the carb. I believe the carb kit or a new carb will take care of thank problem I hust can't make sense off the 1/2 tank thing. The fuel line comes out of the botton of the tank and goes down to the carb hooks in just above the float bowl. I could shorten the line up as I have a filter and the shut off valve in so the line does come down and lays flat for about 6-8 inchs. Maybe thats that problem never thought of it but might be. I am going to rebuilt or replace the carb this weekend and than make that hose as short as I can. Ant more input would be great and thanks for the replies already. Frankp
Old 10-16-07, 03:43 PM
Join Date: Oct 2007
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I have the same mower-

It had exactly the same problems you described.
#1: Take out the fuel tank and make sure it is clean. Re-install. You've already replaced the tank cap, just make sure the vent is open.
#2: My fuel lines were getting soft on the inside so I replaced them. (These mowers are 15 years old now...) No more slime inside the fuel lines.
#3: Get a carb kit and change out the float and the needle valve. Make sure the needle valve seat is installed in the right manner (NOT upside down). Blow out all the the passages in the carb and make sure there is no residual debris in any of the passages. (I had a fuel leak caused by a minute bug wing that had gotten stuck in the needle valve. It filled the crankcase to the level in the fuel tank: almost a gallon and a quart...)
#4: Order part #120188 from Jack Small Engines (It's the only place on the web I could find it). It is a 140 micron stainless steel fuel screen and will replace the old grey one that came with the mower. If you try to put in a paper type filter, it restricts the flow of fuel to the carb and the engine will definately die under load or not run without a full tank. I found that even though I could freely blow air through my fuel screen, gas would not flow freely through it. I had it out on the workbench over noght, when I looked at it in the morning I could not see through it. I have surmised that it is either a fungus or bacteria that has grown over the screen that effectivly slows the flow through it to the point that the engine starves at high load and rpm. (Go figure...)
#5: BEFORE you hook up the fuel line to the carb, run some fuel out into a white bowl until it runs clean (purge it).
#6: Theoretically, if you do this you will not need a fuel shut-off any more.
OBTW: I left my fuel shut-off in the line just after the new screen, just in case...

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