Corymunson
New member
Took my boat out for the first time this season. Ran great for a couple hours but after a couple runs at tubing the boat wouldn’t go above 10 mph. The RPM at full throttle is around 4500-5000rpm like normal but is only going 10pmh. I replaced the engine coupler last year after it completely burnt out and boat wouldn’t go anywhere. Wondering if my prop is slipping or if something else is going on. Planning on taking off the sterndrive to inspect the engine coupler later. Any other ideas on what could be going on?