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Harry Ferguson Tractors Discussion Forum
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TO20 plug wires

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circlej

02-01-2008 06:47:02




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I posted a message a few weeks ago regarding where #1 is on the distributor cap. Several of you provided information and I still cannot find #1. I pulled the plug and tried to find it that way but no luck. Does anyone have a TO20 that could look at the cap and tell me where it is? I.E. looking at the cap from the side of the tractor it is the left top one closest to the fan. Thanks!!




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Bendee

02-02-2008 05:39:12




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 Re: TO20 plug wires in reply to circlej, 02-01-2008 06:47:02  
The compression stroke will be easier to find if you remove 2 3 and 4 spark plugs,then compression is only on one cylinder.



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gshadel

02-01-2008 13:29:29




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 Re: TO20 plug wires in reply to circlej, 02-01-2008 06:47:02  
circle...
your #1 plug could in theory be at any position on your cap. Your distributor can be rotated and installed in any position, and is just a gear that meshes up to the cam. So depending on how the last person inserted your distributor determines which post is #1 on your cap. You gotta do as the other guys say to find the top of compression for the # 1 cylinder (#1 is cylinder at the front of engine, not the rear of engine... just so we're clear).


George

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Jerry/MT

02-01-2008 10:42:12




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 Re: TO20 plug wires in reply to circlej, 02-01-2008 06:47:02  
Sorry, but you"ll have to get the #1 cylinder on the compression stroke and then rotate the engine to the timing mark. Then look at the rotor because it"s pointing at where the #1 plug wire should be. you can time it by pullingthe #1 plug wire and putting a paper clip or a bent wire into the boot, loosening the distributor, turning on the key switch and holding the #1 plugwire/paperclip near a good ground. Rotate the distributor back and forth in small increments increase the the increment until you hear the spark snap. At that point you are staticallly timed. It may take a few tries to get it right but when you do, tighten down the distributor, start the engine and check with a timing light. Also rev the engine and make sure that the centrifugal advance is advancing the timing.

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ford-s

02-01-2008 08:51:02




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 Re: TO20 plug wires in reply to circlej, 02-01-2008 06:47:02  
hi cj,your NO.1 PLUG is in 7 oclock position,or you might say it is the lower left plug wire on your dist.cap.cw



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phil(va)

02-01-2008 08:47:53




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 Re: TO20 plug wires in reply to circlej, 02-01-2008 06:47:02  
You can't tell by just looking at the distributor. Pull plug and distributor cap and turn engine until on compression stroke and rotor will be pointing at number one. I have a 30 where number one is lower left looking at side of tractor and another where number one is upper left. You have to do it as instructed previously. If you get exhaust stroke and mistake it for compression you will be 180 deg. out, and you can fix that by swapping the wires accordingly, which may be easier than finding compression stroke if that task is troublesome. In other words, if you try it, think you have it, but it doesn't fire, you may be on exhaust stroke, so you can move all the wires 180 deg and try again and if it runs you probably were on exhaust instead of compression. They can be a little confusing when using your thumb onthe plug hole. I've been there, done that.

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circlej

02-01-2008 09:37:27




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 Re: TO20 plug wires in reply to phil(va), 02-01-2008 08:47:53  
Thanks I'll try again.



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Don Hooks*

02-01-2008 10:34:45




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 Re: TO20 plug wires in reply to circlej, 02-01-2008 09:37:27  
The issue is that the distributor rotor can be at any of 9 positions and the key to timing it is to place the number 1 wire in the cap nearest the rotor position when the number 1 cylinder is at TDC on the compression stroke and adjust from there. If that position is not at 7 oclock it probably means the distributor was pulled out and not put back in the same place.



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