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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

timing light

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Old Feb 10, 2015 | 09:47 PM
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1990-f250
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timing light

Hey guys I borrowed a snap on timing light from my uncle and it's a mt241a. Anyways, my question is it has a dial on the back for timing advance, but how do I use it? I'm used to the simple ones where you just point and turn the distributer.
 
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Old Feb 11, 2015 | 06:13 AM
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dixie460
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You take and set that dial to your desired timing and when you shine the light at the timing pointer it will show ZERO degrees when the timing is at the setting you dialed in. So if you want 12 degrees advance, set the dial to 12 degrees then turn the distributor til the timing pointer shows zero.

You can also just set the dial to zero to start with and use it as a simple timing light like you're used to. It's just a nice feature to have if for instance your balancer doesn't have a mark at exactly 12 degrees or whatever.
 
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Old Feb 11, 2015 | 08:50 AM
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Originally Posted by dixie460
You take and set that dial to your desired timing and when you shine the light at the timing pointer it will show ZERO degrees when the timing is at the setting you dialed in. So if you want 12 degrees advance, set the dial to 12 degrees then turn the distributor til the timing pointer shows zero.

You can also just set the dial to zero to start with and use it as a simple timing light like you're used to. It's just a nice feature to have if for instance your balancer doesn't have a mark at exactly 12 degrees or whatever.
Oh alright thanks
 
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