John Deere LT155 fuel from exhaust

[StephenP]

Hi all, help please

I have a John Deere LT155 with a Kohler CV15 engine, stopped running and fuel was coming from the exhaust. I have stripped down the carb, cleaned the carb with carb cleaner payiing extra attention to the float needle valve to the fuel inlet, changed the oil and filter and all fine for a while, mowed the lawn thinking all was now fine only to re-mow the lawn a week later and same fault. Stripped down the carb again asuming i didnt do a good enough job last time. this time ran for a couple of seconds then died with fuel again coming frm the exhaust. Any ideas how to sort this please guys n gals. Thanks

 

[reynoldston]

Replace that needle valve, it may look good to you but it sure sounds to me that it's not doing its job.

 

[hntrsr]

Replace that needle valve, it may look good to you but it sure sounds to me that it's not doing its job.

Check the float for a hole, make sure the needle valve is not pitted and replace the seat, thwe gas mixture destroys seats

 

[StephenP]

Thanks for the responses, needle valve confirmed as the issue, now replaced and sweet as a nut, cheers

 

[redmondjp]

Add a fuel shutoff valve between the fuel tank and the carburetor, and close the valve after you are done mowing. I have done this on every mower that I maintain on which the fuel tank is higher than the carburetor.

 

[StephenP]

Thanks, have ordered a shut of valve, although all seems fine now it's makes good sense to fit one, cheers

 

[logan01]

Thanks, have ordered a shut of valve, although all seems fine now it's makes good sense to fit one, cheers

Depending on the type of petrol you have over there (mostly ethanol here), long term exposure to products such as ethanol, alcohol, etc is known to deteriorate parts such as needles. This mostly happens when the mower, etc is not used on a regular basis such as storage for 30 days or more. To extend the life of your needle, I would recommend you turn off your new shut off valve and let the engine starve out (don't forget to turn the key off afterward). Some folks may inevitably disagree but I have seen this happen to a few folks including myself.

 

[bertsmobile1]

Depending on the type of petrol you have over there (mostly ethanol here), long term exposure to products such as ethanol, alcohol, etc is known to deteriorate parts such as needles. This mostly happens when the mower, etc is not used on a regular basis such as storage for 30 days or more. To extend the life of your needle, I would recommend you turn off your new shut off valve and let the engine starve out (don't forget to turn the key off afterward). Some folks may inevitably disagree but I have seen this happen to a few folks including myself.

Very good advice.
I fit cut off taps to every mower I service and advise the owners to do as mentioned above,
Fit the tap between the filter & the tank so it makes filter changing easier & cleaner.