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Why does my 190 Bay plow at WOT ?
I bought my 190 bay almost a year ago and I've written about this before but I'm still looking for a solution. The boat has a 115 Yamaha 4 stroke with about 150 hours on it and I just replaced the worn (chipped up) original 13 1/4 x17 prop with an identical factory unit and the boat still plows. WOT is 5900 RPM's and top speed is down to 36 MPH(GPS speed) which I can live but I'm certain the boat would go another 4 or 5 MPH if it would just stay up on plane. My best guess is the bow should be up another 10-12" at WOT. Basically the problem is too much boat in the water and instead of gliding on the rear flat section of the hull it plows like a displacement hull. Trimming the engine doesn't bring the bow up either. The boat is light and the forward fishboxes are empty. I keep the gas tank about 1/2 full to minimize weight and I only have 1 battery and no trolling motor. I installed the 3rd drain plug and keep a concrete block under the trailer jack so it sits as high as possible. I tried a stab plate from Bob's and it made things worse. At this point I'm puzzled and can only think of a couple things that might be causing the problem
#1. An accumulation of water in the inner hull
#2. Engine mounted too low (unlikely)
Do any of you Captains have a suggestion for a fix? Thanks in advance!
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