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Ford Tractors Discussion Forum
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spark plugs

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Don Lyon

05-27-2015 12:59:15




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What spark plugs should I be using in a 1957 gas 860? All the tune-up pages I go to list gap but not plug number. Also, on this website on the tune-up page under timing mark is says FLY--what is FLY? I am currently using Autolite 437 plugs but its running a little rich so I'd like to go to a hotter plug. I've got a new head, new carb and fresh ignition buts its still too rich. Thanks, Don.




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soundguy

05-28-2015 07:14:51




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 Re: spark plugs in reply to Don Lyon, 05-27-2015 12:59:15  
437 plugs are plenty hot.. fix the rich problem. Check that air cleaner.



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JOHN'S FORDS

05-27-2015 19:29:49




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 Re: spark plugs in reply to Don Lyon, 05-27-2015 12:59:15  
FLY = flywheel,timing mark is on flywheel



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Don Lyon

05-27-2015 22:18:49




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 Re: spark plugs in reply to JOHN'S FORDS, 05-27-2015 19:29:49  
I've got a new (not rebuilt) carb, new ignition, new head. I've checked for intake leaks with no luck. Adjusting the carb does not noticeably change the way the motor runs which is puzzling. I'll tear apart the aircleaner but I've looked at it and seems ok. I'll check it for insect or mouse nests up inside the housing, oil is clean. I can't find any data about the correct spark plug to use, I just replaced the ones that were in it and don't know if they are right-Autolite 437. Thanks for the suggestions, Don.

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old

05-27-2015 18:07:21




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 Re: spark plugs in reply to Don Lyon, 05-27-2015 12:59:15  
Plugs are not likely to be your problem but carb and or air cleaner very likely to be the problem. Air cleaner needs to be cleaned and new oil put in and maybe adjust the carb main jet some to lean it out. If adjusting the main jet does not help good chance the carb need cleaned/rebuilt



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JMOR

05-27-2015 13:56:39




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 Re: spark plugs in reply to Don Lyon, 05-27-2015 12:59:15  
Quoting Removed, click Modern View to seeChanging spark plugs will not alter the air/fuel ratio. That is done by adjusting the main power adjust needle on the carb. Screw in to lean the mixture.



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