I know this has been discussed before but i wanted to see if any body has narrowed this down to an exact fix. I have a 1996 Kenner 21 with a 1996 Johnson 150 Ocean Pro and it is surging from half throttle to WOT. I have had all 6 carbs. rebuilt, a new waterpump installed, changed out the pick-up tube in the gas tank, the bubble, the filter and the fuel line and also installed a water seperator filter. I have change all of the plugs out and made sure every vent was open and every clamp is tight. 5 out of 6 spark plugs look perfect but one is wet and black. Have not done a compression test but will be doing it soon. Is there any obvious solutions that i should be looking for and have missed. I really need some help and am out of clues. Will somebody please let me know your thoughts?
Thank you very much,
Scott
Thank you very much,
Scott