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  #1  
Old 02-16-2021, 09:40 PM
PhatRV PhatRV is offline
 
Join Date: Mar 2018
Location: Buena Park, California
Posts: 424
Default How Know Which Mag Wire Connect To Which Cylinder

I have a Slick magneto with impulse coupler on the left side of the engine. How can I know which wire goes to which cylinder? From what I can find this is what I "think" the sparkplug wiring should be. However, is there a way to find out with certainty which wire goes to which cylinder from looking at the magneto?

I've search the Champion website and could not find the documentation other than the sales brochures. The picture is from Lycoming M1A engine. However, various Lycoming docs only show a doodle of the wiring but do not explain how to know which wire goes where.

Thanks in advance.
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  #2  
Old 02-16-2021, 11:01 PM
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vlittle vlittle is offline
 
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The cylinder number is stamped on the spark plug nut at the end of the wires.
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  #3  
Old 02-16-2021, 11:37 PM
BobTurner BobTurner is offline
 
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Location: Livermore, CA
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+1. On standard harnesses the cylinder/plug is stamped on the nut.
Starting at your red ‘1’ and moving to lower right (counterclockwise) the order is 1T - 3T - 2B - 4B where the T is top and the B is bottom plug.
For the other mag start at upper right, move counterclockwise, order is 1B-3B-2T-4T.
Be sure to check the timing prior to engine start.
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  #4  
Old 02-17-2021, 10:07 AM
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Raymo Raymo is offline
 
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Location: Richmond Hill, GA (KLHW)
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This link will take you to a PDF for Lycoming engines.
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  #5  
Old 02-17-2021, 01:58 PM
PhatRV PhatRV is offline
 
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Location: Buena Park, California
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Thanks for the replies. I have to check the nut again, maybe it was the low light in the garage at night that I missed these details. Regarding the Lycoming manual, I have the same PDF files but they don't show the wiring number in the illustration.
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RV8 standard build: Empennage 99% completed
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Electrical -- 90%

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  #6  
Old 02-17-2021, 02:07 PM
BobTurner BobTurner is offline
 
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Location: Livermore, CA
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Quote:
Originally Posted by PhatRV View Post
Thanks for the replies. I have to check the nut again, maybe it was the low light in the garage at night that I missed these details. Regarding the Lycoming manual, I have the same PDF files but they don't show the wiring number in the illustration.
You just have to find the right manual. I found it online.
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  #7  
Old 02-17-2021, 02:25 PM
Avanza Avanza is offline
 
Join Date: Jul 2020
Location: Vastervik Sweden
Posts: 53
Smile Firing order

https://www.superiorairparts.com/fil...42/SVIOM01.pdf

look at page 42, itīs a good picture.

good luck.
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  #8  
Old 02-17-2021, 02:26 PM
Avanza Avanza is offline
 
Join Date: Jul 2020
Location: Vastervik Sweden
Posts: 53
Smile Firing order

https://www.superiorairparts.com/fil...42/SVIOM01.pdf


look at page 42, itīs a good picture.

good luck.
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