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JD B fuel/carb question

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Gary Quinn

08-05-2001 21:06:54




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My father-in-law has a B(serial # 196xxx) that will not start. We're sure the ignition timing is set correctly. We're getting fuel to the carb. While trying to start the engine, it backfires thru the exhaust. We've set the float level on the carb. We've taken the idle and load adjusting needles out and sprayed the carb cleaner thru all the passages. We've also replaced the gasket between the air inlet and the carb and the gasket between the carb and the intake manifold. I don't know if the backfire is an indication of a lean condition or a rich condition.

Any help would be appreciated. (Its been 2 weeks since he's been working on it, bout ready to shoot it! lol) Thanks in advance.
Gary

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Cam

08-09-2001 10:43:24




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 Re: JD B fuel/carb question in reply to Gary Quinn, 08-05-2001 21:06:54  
Did you take out all the brass plugs and drill out the passages? I used carb cleaner on mine too, but was surprized when I drilled them out. It made a difference, maybe all the difference. Check Robert's Carb Repair site for diagrams and drill sizes. You can even order parts and tools there. Good luck.



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Will P

08-06-2001 22:18:15




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 Re: JD B fuel/carb question in reply to Gary Quinn, 08-05-2001 21:06:54  
Worked on my mag. Put it in 180 out. Backfired out the exhaust. Reverse the wires like Russ said. Let us know if that worked.

Will P



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Russ

08-06-2001 06:56:05




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 Re: JD B fuel/carb question in reply to Gary Quinn, 08-05-2001 21:06:54  
Make sure someone has not installed the Mag 180 deg out. When correctly installed the top wire should go to the flywheel side. You can run a tractor with the mag 180 out, but if you do the top wire will go to the clutch side. Try reversing the mag wires, and if that fixes it re-install the mag correctly. Russ



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Larry

08-06-2001 05:27:56




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 Re: JD B fuel/carb question in reply to Gary Quinn, 08-05-2001 21:06:54  
If the timing is right, there should be no backfiring unless the exhaust valve is sticking. Take the valve cover off the head, and see if all the valves are free. A lot of times they will have one stuck open after sitting for many years, or sometimes a few weeks.



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