1974 johnson, 70hp

[todd69]

I have no spark on all three cylinders. I found low resistance on one coil on the primary side, 300 ohms instead of 2000. Will one bad coil bring down the spark on all three cylinders? Other two coils OK.

[Daviet]

You need to get the OEM manual and check out your system. There are several componets to your ign system, some under the flywheel and some bolted on the block. To correctly troubleshoot your system you will need a manual.

[JUST-IN-TIME]

go here

http://www.cdielectronics.com/downlo...inrude_DVA.pdf

you need a DVA and meter