98 Ocean Pro 200 losing spark at #3 & #4 cylinders intermittently

horboroaks

Cadet
Joined
Jul 17, 2014
Messages
19
My 1998 Johnson/Evinrude 200hp 2 stroke outboard is losing spark at #3 and #4 cylinders. At idle it will die when it happens, and if i try to hold a 1500 rpm idle it will drop to 1300, and 1400 and back with spark cutting.in and out. At i higher throttle 2500+ i have spark. I used a spark tester and found those cylinders cutting out and back on, but will idle fine when fired up for the first 30 seconds, then spark is lost and it stalls It confuses me how it happens intemittentl
 
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