F350 Hesitation RPMs Drop at Higher Output 4000-5000RPM
I'm having a high output issue currently with my F350. 69 hours since last flywheel replacement. Most recent operation timeline is as follows... Ran boat from Satellite Beach to Stuart (outside) last Friday. Fished (ran it) all day Saturday. Fueled up in Manatee Pocket (she took 52 gallons) and ran back up to Satellite Beach (~70 mi run) in the intracoastal Sunday. On the way home, ran it in a 4800-5000 RPM range majority of time (approximately 2 hours). Towards the end of the trip home the motor would hesitate and behave like it was coughing (35 gallons burned). When I reduced RPM to 4000, all was smooth. Total round trip mileage last weekend was (~160-170 statute miles). This weekend ran at 4000 and she isn't happy. RPMs drop and she tries to get back to 4000 but just cant do it. Drained fuel from water separator and fuel is clear. Changed the Water Separator anyway and changed the Under Cowling Fuel Filter also. NO LUCK. Lower RPMs run smooth. Higher RPMs she isn't so happy. Noticed a reference to Primer Bulb in earlier posts - mine remains squishy on plane. Plan on changing that today. Any input / solutions to similar experiences would be appreciated. Happy Father's Day gents!