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Subject: 8N Flooding

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Cal Sexsmith    Posted 02-09-2020 at 17:44:50 [URL] [DELETE]        [Reply] [Email]  
  • 8N Flooding
  • My 8N is flooding badly. It was not starting and I could smell gas. I removed the air tube from the air cleaner to the carburetor and I noticed that gas was flowing out of the carb. I let the tractor sit and removed and cleaned the spark plugs. When I got back at it the tractor would fire, but not run for more than a few revolutions. Again I noticed fuel flowing from the carb. Does this indicate an issue with the needle valve or float? It seems to me that something must be not quite right in the carb.

    Tim Daley(MI)    Posted 02-10-2020 at 05:56:11 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N Flooding
  • Did the flooding just begin or have you done something to the carb you haven't mentioned? Are you turning the fuel flow valve OFF when tractor is shut down? When was the last time you serviced the carb? As you surmised, a stuck float or needle float valve is the usual culprit but there's only one way to find out. I'm not one of those that SMACKS things with a hammer, wrench pliers, or screwdriver as a 'fix'. Do the job right in the first time. If you are interested, I rebuild OEM Marvel-Schebler TSX carbs and ready can do yours if you are interested - email is open.


    Tim Daley(MI)

    Cal Sexsmith    Posted 02-11-2020 at 15:28:40 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N Flooding
  • Thanks to all who offered suggestions. It turned out that the brass seat that the needle valve fits into was a bit loose. I tightened it up, put the carb back on, cranked it a couple of revolutions pulled out the choke and away we went :-). Loose seat was probably caused by the guy who replaced the needle valve a couple of years ago. I am looking in the mirror and having a stern talking to with him right now.

    JMOR    Posted 02-10-2020 at 05:08:56 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N Flooding
  • turn off the gas at sediment bowl and try starting tomorrow. It should not "flood" then and start and run normally for about two minutes as it uses up the gas in carb float bowl.. If that is the case, then investigate float/needle/seat.

    Bruce(OR)    Posted 02-09-2020 at 21:19:00 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N Flooding
  • Well, start off easy. SMACK the side of the carby with a LARGE plastic screwdriver.
    That might un-stick the float. Other than that, sounds like the float has a hole in it and sinking.

    Jack - Iowa    Posted 02-10-2020 at 22:43:20 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N Flooding
  • I prefer to use the Plow wrench and tap it lightly. Certainly a good first test and unless you get too strong will not hurt anything.

    JR in AR    Posted 02-10-2020 at 12:34:17 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N Flooding
  • My dad had a float that started leaking when I was a kid. It was on an Oliver. I remember that he drained the gas out of the float and soldered the pin hole closed. It is still working today.

    HCooke    Posted 02-09-2020 at 19:16:30 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N Flooding
  • Float may be leaking. Check when you are cleaning and replacing the needle nd seat.

    Dave H    Posted 02-10-2020 at 09:51:17 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N Flooding
  • Bruce, your post reminded of my pop. He had a flat spot on the side of the carb from fixing the sticky float with one of those big curved wrenches from the tool box. :)

    Farmer Dan    Posted 02-09-2020 at 18:16:40 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N Flooding
  • The float needle is not seating and stopping the fuel flow like it should. Time to take the carb off and give it a good cleaning and adjustments.

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