So I was out yesterday and I hit another boat wake pretty hard the motor then kinda missed for a second I figured since it is a carburated engine that it was not that big of deal but for the next 20 min. or so is was acting a little funny almost missing like. Then it just kinda went back to normal and ran fine for the rest of the day. This is the 2nd time this has happened this year. The motor is a PCM 5.8 351.I replaced the spark plugs this year so it's not them. Any ideas on what it may be?
A miss could be caused by a lean condition or a spark issue. Ohm all the spark plug wires or replace them. Check the distributer. Recheck timing. Replace the distributer cap and rotor. Replace the fuel filter(s). Have the carb rebuilt. That should pretty much cure whatever is the problem.
Lean being lack of fuel, Kind of what I was hitting on as well. If you've run a couple tanks through that might not be it. How long since you replaced the fuel filter? Does your's have the fuel/water seperator? If so, is there a lot of water in it?