Motor idles good but slow to reach higher planning speed.. After a while kicks in and gets to full rpm.fuel filter clean.Fuel pressure good.Plugs new..
Idle rough runs on 3 or 4 then if you can goose it to get past 3000 it runs great.new fuel,new plugs,carbs are clean,jets are clean ,fuel pressure good,spark is constant
Motor misses at idle seams like 4 cylinders and bogs till you goose throttle and get to 2800 or more then motor kicks In and runs strong until you pull back down throttle .
Carbs gone thru new plugs new fuel ,spark is constant