Evinrude v4 90hp no spark on one side

[Thaiboxer04]

Hello all. I just bought an old Evinrude 90, not sure on the year yet but I think early 80's. It has oil injection with an external tank. I checked for spark yesterday and when facing the plug wires... the right 2 have good spark and the left 2 have nothing. I was wondering if anyone had ideas on what it could possibly be or what diagnostic tests to run on it. Thanks in advance!

 

[sutor623]

Typically if one whole bank is gone, it will be the stator or the powerpack. You can normally rule out ignition coils and possibly even the timer base, but I would still check the timer base.

To diagnose this you need a multimeter with a DVA adapter, and find your particular motor in the following manual. If you dont have a DVA meter, you can NOT diagnose this issue.

http://www.cdielectronics.com/support/

 

[emdsapmgr]

An engine with a VRO pump is at least 1984 or later. You can do a simple test. Swap the two power packs. If the non-firing problem switches to the other head, replace the power pack.

 

[Thaiboxer04]

Thank you kindly gentleman! I will try to swap the power pack and report back. Have a great weekend all!