Ludicrous40
Well-known member
Repowered my 2003 2520XL with a 2021 Suzuki DF300AP, the engine is on a bracket. Got it in the water late October, only have 50 hours on it, so still getting familiar with it. It is completely different than the Evinrude 300 that I removed, the Evinrude wanted to go fast, the Suzuki is a power plant. The power, torque, noise, economy, all are better than the E-Tec. To the point: At some conditions now ( I think a following sea was the worse ), I get harmonics in the cabin of the boat that I would compare to the sounds that you get when you put a rear window down in your truck. If you go out into the cockpit there is no evidence of this, just the motor sounding awesome. If you come back into the cabin, there is a definite harmonic noise. Just curious if anyone has experienced this and found ways to improve the situation. If you close the cabin door, it is better, but when at the helm, you can just move your head in various distances from the front window, and you get different noise levels. It seems like the harmonics or frequency of the motor are being magnified in the hull/cabin, but the engine isn't vibrating. The Evinrude was loud but didn't do this, but the engines are dramatically different.