Question about Ford 8N Tractor

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Why does my 8N Ford tractor die at about half throttle?

Full tune up, rebuilt carb, if I pull power needle it will rev all the way. new fuel shut off valve and cleaned tank. was running ok then started this

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  • Matt Southard
    Matt Southard Mar 30, 2014

    it starts and runs great to a little least than half throttle will run all day that way checked timing all good new everthing and it does not have fuel pump thanks

  • Matt Southard
    Matt Southard Apr 01, 2014

    i have pulled carb 4 time. installed inline fuel filter no defferace if i pull power/main needle adjustment rev up not sure of power have not drove it that way

  • tractorman44
    tractorman44 Apr 14, 2015

    I'd bet the nozzle above the main jet is partially plugged. That;s the long brass tube that sticks up at an angle through the venturi of the carb. It'll have a hole all the way through and possibly as many as six opposing holes up the length. It is removed with either a 5/16 or a 3/8 deep socket to expose the main jet underneath. Once removed, thoroughly clean all holes and clean the main jet also. That should make a big difference.



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Sounds like it might be starved for either air or fuel. Have you made sure there is full gas flow from the tank to the carb? Also recheck the needle valve regulating gas flow into the carb. May be that a speck of trash is partially plugging that flow to carb. Should have in-line fuel filter (add on) in addition to the bowl 'filter

Posted on Mar 31, 2014


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Posted on Jan 02, 2017

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SOURCE: Ford 8N will not start when hot

This sounds like a bad fuel pump to me. The only way to be sure is to check the fuel pressure when cold, probably around 45 PSI. Then when it get hot it will drop way down to 10 or 15 PSI. Check the pressure if you can, or change the fuel pump.

Posted on Aug 14, 2009

  • 8 Answers

SOURCE: ford 8n sometimes just stops-very hard to restat.

Could be a bad condensor or coil, flaking out when they get hot. If it starts ok after it cools down about an hour and is cold, then very likely the problem. would have everything you need for replacements.

Posted on Dec 22, 2009

  • 8 Answers

SOURCE: 8n ford backfiring through carb

Engine is either out of time, or plug wires are crossed to wrong plug.
Firing order should be 1, 2, 4, 3
If you need new plug wires or timing gears, try

Posted on Dec 22, 2009

  • 165 Answers

SOURCE: I have an 8n ford tractor,I have good blue spark

Choke working OK? Try a scooch of starting ether in the breather----not too much or might blow the head gasket.

Posted on Feb 27, 2010

  • 31 Answers

SOURCE: my 8n ford wont start with new carb, points,

I have also changed my plugs, points, cleaned carb, but I can not get the tractor to fire at the cylinders. I have spark but will not crank. What do I need to do?

Posted on Jun 26, 2010

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