mercury 40hp 4 stroke 2018

by billy
(north texas)

Motor seems to have lost power and top speed. Came with a 2018 bass tracker heritage edition bass boat. I was able to get 33mph single passenger and now I'm down to max 28mph. Prop has been replaced with new same model black max 10 3/8 14 pitch but top speed is still way down. Trim works fine, rpm at max was 5600 to 5800 now its 5200. 415 hours with a lot of trolling low speed. Fuel filter changed and no observed fuel line issues or tank vacuum issues or sediment observed. It is under warranty and has been maintained at even greater than suggested intervals for oil, low end grease and impeller as well as spark plugs. Fuel system cleaner done every 100 hours.

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