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8N carburetor

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Ken/Wa

06-13-2001 00:07:57




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I am really getting to know my carb. I think I need to rebuild it from rebuilding it. I could not stop it from flooding with the new float valve in it. I adjusted the floats many times. I even held the valve closed and it did not leak fuel that I poured in from the top of the inlet fuel line. I put it back in and it still flooded. I finally put the old valve and seat back in and it quit flooding. This kit was from NAPA, and I have used them before with great success. Guess I got a lemon. The tractor starts great and even idles with the choke off now, however the throttle does not respond and lacks power. I am sure it is getting enough fuel, but could be wrong. After looking at some of the archives, there are alot of things that could be the problem. I have ordered a tune-up kit, cap, and plug wires. After installing these parts and checking timeing, if it still does not have power, I will look at the governor. I do not like replacing everything until I get it fixed, but the parts look pretty old. I was reading a post tonight that stated the plug wire rotation on the dist being wrong would let it run and not have power. I will check this tomorrow. Any suggestions will be appreciated. I am not even sure the carb is not the culprit. The tractor idles great, but has a miss. I am hoping the tune-up kit will take care of this. I will keep reading the archives and trying the suggestions every night until I get it running right. I have checked for vacum leaks, can not find any. Thanks for the past posts and any future posts.

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Bri9n(Ont)

06-13-2001 19:58:24




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 Re: 8N carburetor in reply to Ken/Wa, 06-13-2001 00:07:57  
Ken...keep us posted on your success when it comes...I'm working on the same problem (miss at low idle)...rebuilt the carb last weekend and had hoped I'd found it when I found the mating surfaces were not tight. But, it wasn't that....now I'm going to take apart everything upstream of the carb....I if can borrow a carb for an hour I'd also like to switch to check the difference, since I still suspect it may be part of the problem...good luck with yours.....Brian.

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Claus

06-13-2001 08:35:14




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 Re: 8N carburetor in reply to Ken/Wa, 06-13-2001 00:07:57  
You seem to be jumping around here from one thing to another. A quick way to see if the culprit is the governor, is to look at the throttle plate as you advance the throttle, the throttle plate should be opening as well. This does not indicate that the governor is in good condition but rather that the linkage is tight. If the throttle plate moves as you progress the throttle, then we can discount the governor as the problem. To check to see if the needle is seating propery, I turn the carb upside and blow into the fuel inlet, there should be no air escaping. To check for proper fuel flow, open the bowl drain and check for good fuel flow into a clean can or other suitable container. Happy Motoring
Claus

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Bill (VA)

06-13-2001 04:10:09




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 Re: 8N carburetor in reply to Ken/Wa, 06-13-2001 00:07:57  
Ken,

Sounds like things are going exactly per plan. If you fix something on the first try and it is real easy you lose out on all the cussin and bloody nuckles that should go along with the joy of owning one of these. Mine did not run right until I cleaned and resealed the gas tank, changed the whole wiring harness, new plugs, points, condenser, cap and rotor, ignition switch and coil, and cleaned and rebuilt the carb (twice)and cleaned all fuel filters. Reflecting back... The rust and gunk in the tank had the most to due with poor performance. Of course it clogged up the filters and gunked up the carb. The coil or ignition switch may have been contributing to some of my problems after the motor ran awhile.
My governor will be my next project to rework. It is not completely broke but it is not quite right.

Good luck

Bill

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