Hi guys I have a 1996 Champion with a 96 Evinrude Vindicator 200 that I bought back in July, shortly after purchasing I had an issue with the motor surging when running at higher RPM’s. Would go down to as low as 2000 then surge back up to 5800. I replaced water separator ,fuel filter, primer bulb, pumped fuel into mason jar with primer bulb to check condition of fuel in tank (no gunk or water in it) changed spark plugs (which didn’t look fouled up) fixed cracked valve on primer solenoid, and added startron and seafom with next fill up. This issue went away for the next few trips which made me think it was fixed. My last trip we ran around a a lot and it ran strong all day until the way back to ramp the issue came back same symptoms surging at high rpms sounds like it’s stalling then shoots back up and is continuous. Idles and starts up fine unless it’s cold but I know thats common with these motors. Any ideas of what could be causing this? Any ideas would be appreciated!
Planning on rebuilding carbs, replacing fuel lines, and replacing vacuum switch which I notice was leaking fuel when primer bulb was squeezed. Model number on motor is #E200STLEDM