Any thoughts as to what could cause a 10mph top end loss? Engine is not mis-firing or stumbling, starts right up, idles smooth, full throttle RPMs are between 4200-4300 rpms. Slow to plane, it used to get up and out of the hole quickly...and RPMs only slowly pick up. Feels like the boat’s dragging or really weighted down. No water in the engine compartment. Top end is usually somewhere around 48 mph but we can’t get over 36 mph. Oil pressure’s fine, new oil, running perfectly besides the power loss. Steering feels stiffer than usually and possibly there’s a loss of responsiveness/directional control while reversing.
Thoughts on possible issues to troubleshoot please... TIA
_________________ 2008 278 Vista | 8.1 Gi Volve Penta Mark II C Touring Zodiac w/9hp outboard
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