4-Horse 4-Stroke / M17 Kick-Up Rudder . . . Edit . . .
To Those Who Wanted to Know How I Like My Nissan 4-Horse 4-Stroke: This Spring a few people asked me how I liked my Nissan (Tohatsu/Mercury) 4-horse 4-stroke. I didn't get my M17 in the water until the last weekend in June, so as I write this, my outboard has fewer than the recommended 10 break-in hours, but I guess I can render an opinion. The only other outboard with which I have experience is the '84 Suzuki 4-horse 2-stroke that was included when I purchased my '84 M17. The Suzuki was difficult to start, very loud, very rough, very "smelly", and had a tendency to try to cavitate out of the water whenever I tried to put it in reverse. The Nissan is relatively easy to start. It has forward/neutral/reverse and goes into gear smoothly. It seems to produce virtually no fumes once the choke is reinserted after startup. The motor is not as quiet or smooth as I'd like, although it seems to improve every time it's run. Compared to the Suzuki 2-stroke, the Nissan is silent and vibration-free. Bear in mind, I despise internal-combustion engines, consider them a necessary evil, and prefer to use my Minn Kota electric trolling motor. I know that, with the Nissan, I can sit inches away from the motor while talking to crew in a normal tone of voice and avoiding asphyxiation, so that's about as much as I'd hoped from the 4-stroke. I don't really have an opinion on fuel ecomony, other than that the Nissan 4-horse's internal tank seems to run dry faster than I would have expected, however, my expectations were probably unrealistic. My motor has an optional connection for an external tank, which I would probably use for extended cruising, but have no such plans this season. I also added the optional alternator, but haven't used that, either. I also have plenty of power. I think I'm close to hull speed at slightly less than half-throttle, which is where I've kept the motor for proper break-in, except for my last outing when an accidental grounding forced me to throttle high in forward and reverse. I sail Lake Michigan, where I don't really deal with strong currents or tides, but my hunch is that, even if I HAD strong currents and tides, 4 horses would provide plenty of power to handle them. I'm incredulous that anyone would need 6 or more horses for an M17, but I'm also inexperienced, so my opinion doesn't count for much. Where I store my boat, mast-up, my neighbors all have Honda 4-strokes that look prettier, sleeker (external tanks) and lighter than my Nissan, but they were also probably substantially more expensive. So far, I'm happy with my purchase, and would recommend it over any other 2-stroke, but can't compare it against other manufacturers' 4-strokes. Please understand that my personal experience with the Suzuki 4-horse 2-stroke is probably not typical: I'm mechanically inept and I had an old motor that had been used in saltwater. I can definitely appreciate that the old Suzuki weighed less! So, for what it's worth, with less than 10 hours on my Nissan, I'd buy it again, but ask me again in two years. p.s. To those of you who have asked me about my M17 kick-up rudder: I am very happy with it and can't feel any difference from the stock rudder when the blade is down. However, I had to add an "eye" to the skeg through which I could run a rope ("uphaul"?) to keep the blade down. The eye was added in 'glass by a local boat repairman and looks factory original: I'll send a pic of it to Doug to post with the other photos of my rudder on the MSOG site. The "eye" works brilliantly.
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Honshells