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briangroc 
Bronze Level
Joined: 01 Apr 2010
Location: vestal ny
Points: 13
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 Topic: wd run rough under load
Posted: 02 Nov 2010 at 12:08pm |
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searched the forum, not much help
49 wd with a mag, new plugs gapped .030, new wires, cleaned out the carb.
Starts rite up, but doesnt "purr" like it was
when the tractor is under load (brushhog) it can barely get out of its own way.
tractor is popping(not backfiring) not a crisp engine sound
almost sounds like its not running all 4 cylinders. stuck valve ?but im not sure how to tell
guys have any suggestions
tractor was running fine 2 weeks ago
Thanks Brian
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Bob D. (La)
Orange Level Access
Joined: 12 Sep 2009
Location: Louisiana
Points: 25529
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Posted: 02 Nov 2010 at 12:28pm |
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When you replaced the plug wires did you use "wire core" plug wires. A mag will not run correctlyon carbon core wires.
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When you find yourself in a hole,PUT DOWN THE SHOVEL!!!
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Brian Jasper co. Ia
Orange Level
Joined: 11 Sep 2009
Location: Prairie City Ia
Points: 10508
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Posted: 02 Nov 2010 at 12:32pm |
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I'd have to look to be sure, but I think maybe the plug gap for a mag is .025. Did you put new points and condenser in? Don't get cheap ones. Borg Warner or Standard Blue Streak are the brands you want. The stuff at TSC for tune up are not what I would use. When it comes to wires, you need to use solid wire core type. The automotive suppresion type don't work well with a mag. Does it help to pull the choke out a bit? If so, you may have a carb adjustment/clogging problem. Old fuel can loose it's potency and not run well.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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mlpankey
Orange Level
Joined: 13 Sep 2009
Location: Vols country
Points: 4580
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Posted: 02 Nov 2010 at 12:35pm |
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gap is to wide for mag . may not have the load jet set correctly also. if i had a picture of a couple of the plugs it would be a help. spark plugs are the window to the combustion chamber.
Edited by mlpankey - 02 Nov 2010 at 12:38pm
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briangroc
Bronze Level
Joined: 01 Apr 2010
Location: vestal ny
Points: 13
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Posted: 02 Nov 2010 at 12:59pm |
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i did not use " wire core" wires, i will get them. i was a cheapo
plugs have a white/gray color to them when pulled
when i turn in the idle adjusting screw on the carb nothing happens.
at some point it should shut off fuel to the tractor rite?
I did not realize a mag has points and a condensor. I will get and replace. is it easy to replace?
guys thanks for your time Brian
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