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Fouling spark plugs on 300/450

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Scott

01-07-2002 05:16:20




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I own a 300 and 450 and have trouble with both fouling the second plug back from the front. Any Ideas? Later Scott




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Jerry

01-10-2002 13:43:10




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 Re: Fouling spark plugs on 300/450 in reply to Scott, 01-07-2002 05:16:20  
I had the same problem with my 300. I was running champions. I switched to auto lite and havn't had any problems.



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Greaseman

01-07-2002 09:51:51




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 Re: Fouling spark plugs on 300/450 in reply to Scott, 01-07-2002 05:16:20  
I had problems like your's with an Allis "B" Chalmers, I finally had to go to a "Hotter" plug and I purchased a pnumatic spark plug cleaner. Great thing.



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Chicken George

01-07-2002 06:26:33




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 Re: Fouling spark plugs on 300/450 in reply to Scott, 01-07-2002 05:16:20  
Scott, My 400 does the same thing. There was quite a thread about a year ago on this, basically go to D21's or D23's (Champion or equilvent)if you can get them and lean down the maim jet.You are probably not working the motor enough to get it realy up to operating temp. and this gas with alcoahol seems to do that at colder tempratures. just remember to richen it up and go to colder plugs if you work it like plowing or discing.

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The Red

01-07-2002 06:07:41




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 Re: Fouling spark plugs on 300/450 in reply to Scott, 01-07-2002 05:16:20  
What plugs are you using and what does the end of the plug look like after fouling?



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the tractor vet

01-07-2002 07:44:25




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 Re: Re: Fouling spark plugs on 300/450 in reply to The Red, 01-07-2002 06:07:41  
First thing is to get a good set of plugs in it i prefer MotoCraft or Auto Lite or and AC C86 or 87 off the top of my head i can't remember the other plug no. Then get the tractor warmed up check the timing at idel and at full throttel set the timing to spec. Then idel it down and set low idel then fine tune the air bleed screw for the best low end and keep backing the curb idel screw out till she is running as smoothe as you can get it at the lowest setting then rest the idel screw to spec and look at the exhust and make sure that you have no smoke at idel then set the main at 41/2 turns off the set ,do not force the screw against the seat just so it touches the seat then 4 1/2 turns out . then don.t buy cheep gas put in a higher grade and it will make a differance.

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