If that's a single 350 engine on a 26 ft boat I'm thinking you need to use a very low pitch prop to get it to perform well. Go to a shop that re-does props, I bet they could suggest a good pitch for you. Make sure that other causes of low engine rpm are ruled out, such as fuel system restrictions (anti siphon valve, fuel filters, tank vent, etc) and ignition faults (bad points/condenser, mechanical advance not advancing properly).
_________________ 88 Four Winns 200 Horizon 4.3 OMC Cobra-4bbl 2002 Walker Bay 10/2012 Suzuki 2.5 2008 Walker Bay 8
1998 Jeep Grand Cherokee 4.0/Selectrac 2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II
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