Carb Woes
Posted: Wed Jan 09, 2013 4:01 pm
Hi all...
I have been talking with a local member via PM about their cub. One issue that came up was that a recently rebuild carb LEAKS after less than 10 minutes after opening up the fuel bowl. The person used the "deluxe" rebuild kit (not Tisco, I believe). Replaced needle valve, seat, soaked in carb cleaner, cleaned out all passages, etc, but still, after buttoning it back up, it leaks. He even put his old seat and needle valve back in the tractor and STILL has leaks. The replacement needle valve has the dreaded Viton tip, but it is NOT sticking yet. He has kept the valve and the seat as a set. Float is NOT leaking and has no fluid in it. He is confirming float height, but said he believed it was correct.
I talked with him about potentially using some valve lapping compound and lapping the original needle valve and seat together to try to get a good seal.
The reason for this thread is just to vent. I have had similar problems on a rebuilt carb on Merlin (done by one of the carb gurus" when I got the tractor originally). My leak is not rapid, but it still leaks. My problem is compounded by the fact that the valve on my fuel bowl is apparently bad as well, so I can't stop my little drip! The vent is that you would think that such a simple little carb would be easily repaired and would not be so prone to problems as this one is!
I have been talking with a local member via PM about their cub. One issue that came up was that a recently rebuild carb LEAKS after less than 10 minutes after opening up the fuel bowl. The person used the "deluxe" rebuild kit (not Tisco, I believe). Replaced needle valve, seat, soaked in carb cleaner, cleaned out all passages, etc, but still, after buttoning it back up, it leaks. He even put his old seat and needle valve back in the tractor and STILL has leaks. The replacement needle valve has the dreaded Viton tip, but it is NOT sticking yet. He has kept the valve and the seat as a set. Float is NOT leaking and has no fluid in it. He is confirming float height, but said he believed it was correct.
I talked with him about potentially using some valve lapping compound and lapping the original needle valve and seat together to try to get a good seal.
The reason for this thread is just to vent. I have had similar problems on a rebuilt carb on Merlin (done by one of the carb gurus" when I got the tractor originally). My leak is not rapid, but it still leaks. My problem is compounded by the fact that the valve on my fuel bowl is apparently bad as well, so I can't stop my little drip! The vent is that you would think that such a simple little carb would be easily repaired and would not be so prone to problems as this one is!