I have a 6hp 70s evinrude outboard that starts on the first pull but doesn't have the power it used to last season. Here's what I have done so far:
-tested compression and each cylinder is at 100 psi
-checked for spark and each cylinder is firing
-cleaned the carb and put the rebuild kit in it which made no difference at all.
-gapped the plugs to 30 thousands which made no difference
-closing the choke somewhat does nothing for rpm so it doesn't appear to be a lean condition.
Is there anything I am missing????? It is baffling me.....