1984 Johnson 70hp intermittent ignition issue

[carpedium]

The motor has a problem with intermittent loss of spark. This only happens when trying to start the motor, when it is warm it runs like a top.

Based on advice from my local outboard repair guru, he says that my issue is probably the timer base.

How would one test a timer base on an '84 evinrude 70hp outboard?

OMC 582724

 

[SparkieBoat]

Re: 1984 Johnson 70hp intermittent ignition issue

get a DVA adapter and follow the instructions in the link in my sig below.

 

[carpedium]

Re: 1984 Johnson 70hp intermittent ignition issue

get a DVA adapter and follow the instructions in the link in my sig below.

It doesn't show a signature?

 

[carpedium]

Re: 1984 Johnson 70hp intermittent ignition issue

So, do others usually just swap parts to diagnose?

 

[Daviet]

Re: 1984 Johnson 70hp intermittent ignition issue

Go to the CDI website and locate your engine, use their troubleshooting section.

 

[SparkieBoat]

Re: 1984 Johnson 70hp intermittent ignition issue

no idea why my sig did not show up.

Free ignition troubleshooting guide http://issuu.com/cdielectronics/docs...owFlipBtn=true
You will need a DVA adapter http://www.usatoolwarehouse.com/usat...e/ESI-640.html First test compression, Second test spark with a spark gap tester set a 7/16 gap, Third check timing, next CLEAN your carbs properly,

 

[carpedium]

Re: 1984 Johnson 70hp intermittent ignition issue

It turns out the intermittent issue is the timer base assy.