What Length Spark Plug Wires Do Need

[Speed Merchant]

I am fighting a noisy staticky radio. I want to replace my spark plug wires. Does anyone know what length wires I need for my 84 J model?

Thanks

[Hank]

The harness manufacturers know. Give them your model and engine, what comes in the box will fit just right.

It's also possible to replace a single wire, but that kit costs almost as much as a full harness. Just do the while thing.

My new Kelly harness was falling apart at annual after two years, my IA checked and found two others at his field that were in similar shape. He told me I was lucky it didn't come apart on my 20-minite flight to see him for annual . . .

Caveat emptor. 

[Speed Merchant]

11 minutes ago, Hank said:

The harness manufacturers know. Give them your model and engine, what comes in the box will fit just right.

It's also possible to replace a single wire, but that kit costs almost as much as a full harness. Just do the while thing.

My new Kelly harness was falling apart at annual after two years, my IA checked and found two others at his field that were in similar shape. He told me I was lucky it didn't come apart on my 20-minite flight to see him for annual . . .

Caveat emptor. 

Thanks for your post. Guess I am not buying a harness from Kelly. What manufacturer should I use?

[Will.iam]

1 hour ago, Speed Merchant said:

Thanks for your post. Guess I am not buying a harness from Kelly. What manufacturer should I use?

I used maggie’s harness from this website. I am very happy with both harnesses. 
https://www.newhorizonsmaggieaircraftignitionsystems.com/

 

[LANCECASPER]

14 hours ago, Speed Merchant said:

I am fighting a noisy staticky radio. I want to replace my spark plug wires. Does anyone know what length wires I need for my 84 J model?

Thanks

How old is the coax going to the radios?

[Speed Merchant]

3 hours ago, LANCECASPER said:

How old is the coax going to the radios?

They were just replaced with the new style coax. The change made no difference. Thanks for your post.

[PT20J]

19 hours ago, Speed Merchant said:

I am fighting a noisy staticky radio. I want to replace my spark plug wires. Does anyone know what length wires I need for my 84 J model?

Thanks

Does the static go away when the engine is shut down?

[A64Pilot]

2 hours ago, PT20J said:

Does the static go away when the engine is shut down?

Or change in frequency with engine RPM? Alternators in my experience make a whine that changes with RPM not popping static

Edited July 25, 2023 by A64Pilot