I have a 2019 Mercury 60 4S. When I run in neutral to 3,000 RPM then throttle down to idle abruptly I get a slight rough idle for a second or so then it smooths out. Also, the fuel filter at idle appears nearly empty. At RPMs the fuel filter fills up. Are these normal behaviors for this motor?
Michael Dilday
Suffolk, Va.
2021 Tracker 195 TXW 150 Merc 4S, Minn Kota Edge TM, Humminbird Fish Finders
Basically, yes. You shouldn't be accelerating like that in NEUTRAL, however.
Fuel filter only fills (or drains) when the NEEDLE in the VST is in the OPEN position.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
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