motor dunking, noise
Tereza,Factors that make a difference are fresh/salt water, and whether the motor is running or not when it goes under. Salt water is potentially more corrosive than fresh, and a running motor may suck water into the carb and cylinder before it stalls. In rare cases, dunking a hot motor will crack a cylinder head.For small-boat sailors, the plus side is that when we go over, chances are the motor is shut off, the cylinder head is cool, and the upper unit does not remain submerged for very long.The standard old advice for a dunked motor is to get it to shore ASAP, hose it off, remove the spark plug, crank the starter a few times to clear the cylinder, squirt a little oil into the cylinder, and replace the plug. Check the fuel tank for water and if necessary, drain it and replace with fresh fuel. Drain the carb bowl and then start the motor. If it won't start, take it in for service ASAP.Maybe somebody younger than I, and familiar with the newer motors, can tell you if this advice still applies. The electronics may be different and more, or less, susceptible to damage.As for the noise, you'll be paying a premium in both money and weight for a quiet motor. If you are only using it to scoot in and out of the cove, or for occasional emergencies, I'd stick with the noisy 12-pounder, because that's as light as they come. If you are concerned about damaging your hearing (vs. annoying everyone around you), a pair of ear plugs is a lot less expensive than a new Honda 4-stroke. And as a learner, my "capsize anxiety" is lessened by the knowledge that if I dunk my old 2-stroke and it seizes, I'm out $75 plus the price of a replacement. If I dunk a new Honda, I'm out $900 plus replacement.A safety cable or light chain from the motor (usually a hole in the motor mount clamp handle) to a secure place on the transom (on the 170, the metal bracket reinforcing the motor mount) will keep you from losing the motor entirely if the clamp shakes loose underway or during a capsize. Spring has arrived in Upstate NY but Lake Ontario is still at 38 degrees. Hope your lake is warming up faster than that. Happy sailing.Rick