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Quin T Rex

10-18-2025 06:26 PM

Mercury 115 4 stroke EFI 2018

The problem is : the outboard is running 1000 rpms higher than usual but going 10mph slower. It is not the prop . This issue just started two trips ago. Thought it was a spun hub on the prop, Wrong swapped out the prop and the same results today, high rpms and slower speed with a 1.5 gph drop in fuel efficiency . Any thoughts would be very much appreciated

Capt. Debbie

10-21-2025 03:23 PM

Re: Mercury 115 4 stroke EFI 2018

How clean is the bottom of the boat? And lower unit?

Quote:

Originally Posted by Quin T Rex (Post 591108)

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