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Subject: Exhaust popping II

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Rusty2n    Posted 08-28-2017 at 13:23:48 [URL] [DELETE]        [Reply] [Email]  
  • Exhaust popping II
  • Thank you for the replies. Made for a good check list.
    Was out and warmed up the 8n this morning, listening to it run.
    The pop is intermittent. A single pop then a pop pop real quick, and maybe a single pop then does it again.
    Wondering if it could be caused by carb? Not getting it to idle lower than 600 rpm. Seems to do ok other wise. Rusty2n

    clayton ingmire    Posted 08-28-2017 at 23:32:28 [URL] [DELETE]        [Reply] [Email]  
  • Re: Exhaust popping II
  • have you tried adjusting the mixture screws on the carb sounds dead lean turn the small screw in and out and see if it changes also these old tractors were never designed to run unleaded ethanol gas which makes my lawn mower 4 wheel all have a lean pop at idle I'm able to buy non ethanol gas which runs smooth

    Larry Holbrook    Posted 08-28-2017 at 19:51:31 [URL] [DELETE]        [Reply] [Email]  
  • Re: Exhaust popping II
  • My 48 8N does the same thing exactly. Some days it runs like new and then the next time I get it out to mow it starts in and then is intermittent. It doesn't do it all the time but sure is noticeable when it does. I've not a clue what it is. You get it figured out and let me know please.

    r geiger    Posted 08-28-2017 at 13:33:05 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Exhaust popping II
  • I would remove and short out one plug wire at a time and see it you can isolate one cylinder that is causing it. I am thinking stinking valve.

    Farmer Dan    Posted 08-29-2017 at 08:23:31 [URL] [DELETE]        [Reply] [Email]  
  • Re: Exhaust popping II
  • Them darn exhaust valves can be a problem when they don't work right :-) Replaced all my "mushroom" valves with the newer 8N valves after this happened, lot easier to adjust.

    Bruce(OR)    Posted 08-28-2017 at 19:57:44 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Exhaust popping II
  • Howdy Neighbor. Yep Better watch out for them stinking valves. They tend to smell real funny at times. Home depot sells nylon pliers used in replacing fuses which work very well when pulling off wires from a running engine. See if I can find a link. . .

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