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post #1 of 37 Old 03-31-2010 Thread Starter
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Everthing I know about outboards.

After an exhaustive search, for the right motor for my Tanzer 22, I have learned the following:
  • Tohatsu/nissan/merc seem to be the lightest.
  • Tohatsu Sailpro seems great on paper. Many T-22's are powered by 6hp two strokes, including mine. Real world experience with the Sail pro seems to indicate that at WOT they are buzzier and less powerful than an old two stroke. Pity.
  • That puts me into the 8+ category. The only high thrust setups seem to be Yamaha, but are expensive, and weigh in at over 100 lbs.
  • Tohatsu 8/9.8 are really the same engine, but the 8 has it's power limited.
  • Given that I want a charging system, I need to get an electric start. I can retrofit a rectifier, but it will cost more than a factory installed electric start and charging system.
So- I have a line on a new tohatsu 9.8 with electric start/charging for 1800. It is heavier than I want, and more engine than I need.

Any drawbacks to this setup? It uses more gas WOT than an 8hp, but I figure I'll reach hull speed well before that. In real world use, will it use more gas than an 8hp?

Any thoughts, or alternative suggestions greatly appreciated.
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post #2 of 37 Old 03-31-2010
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Sounds like you've done your homework and are hoping somebody here will know something you don't... barring somebody saying "DON'T BUY THAT MOTOR" I would just go for it.

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post #3 of 37 Old 03-31-2010
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As you say,I don't think you need a 9.8 on a T22... the 8 horse would be plenty. Whether the "charging system" is truly effective would be nice to know.. electric start is hardly necessary for such a small engine otherwise.

btw, in the smaller sizes Tohatsu, Merc, Nissan etc are all built by Tohatsu - one interesting tidbit when we last bought an outboard is that Nissan offered twice the warranty.

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post #4 of 37 Old 03-31-2010
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Charging system is indeed unimpressive on the small motors. In principle my O/B has a 4A charging circuit and I actually don't have any idea whether it works or not. We use a portable A/C charger to keep the batteries topped up.

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post #5 of 37 Old 03-31-2010
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Does the 8 HP sell for a lower price?

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Originally Posted by meboater View Post
After an exhaustive search, for the right motor for my Tanzer 22, I have learned the following:
  • Tohatsu/nissan/merc seem to be the lightest.
  • Tohatsu Sailpro seems great on paper. Many T-22's are powered by 6hp two strokes, including mine. Real world experience with the Sail pro seems to indicate that at WOT they are buzzier and less powerful than an old two stroke. Pity.
  • That puts me into the 8+ category. The only high thrust setups seem to be Yamaha, but are expensive, and weigh in at over 100 lbs.
  • Tohatsu 8/9.8 are really the same engine, but the 8 has it's power limited.
  • Given that I want a charging system, I need to get an electric start. I can retrofit a rectifier, but it will cost more than a factory installed electric start and charging system.
So- I have a line on a new tohatsu 9.8 with electric start/charging for 1800. It is heavier than I want, and more engine than I need.

Any drawbacks to this setup? It uses more gas WOT than an 8hp, but I figure I'll reach hull speed well before that. In real world use, will it use more gas than an 8hp?

Any thoughts, or alternative suggestions greatly appreciated.

Seems like "same engine" at lower power might last longer?

Chris
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post #6 of 37 Old 03-31-2010 Thread Starter
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at 1800, it's a little cheaper than the 8hp. Assuming there are no drawbacks to the 9.8, I figure it's a decent deal. Higher resale, will push any boat I am likely to buy in the foreseeable future. Also, given that I figure I won't be running it full out, hopefully it won't be very stressed.

I do wonder: two identical boats, side by side, one running the 8hp, one running the 9.8, which uses more fuel?
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post #7 of 37 Old 03-31-2010
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My Quickstep came with an 8hp 2 stroke Yamaha. I replaced it with an 8hp 4 stroke Honda. The extra weight makes the stern sit low. It's not the end of the world, but if I had it to do again, weight would be more of a factor in my selection. Both the Yamaha and Honda indluded a charging circuit, but neither had electric start. The electric start seems like a nice feature, but adds yet more weight.
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post #8 of 37 Old 03-31-2010 Thread Starter
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I would love to find an 8hp two stroke with a charging circuit and manual start. Plenty of power, light. Just what I need. doesn't seem to exist.
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post #9 of 37 Old 03-31-2010
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I would just go with the 6hp tohatsu sail pro. It will vibrate, but it will get you to hull speed. I am pretty confident that a T22 does not take much to get moving.

Interestingly the 4hp Tohatsu is the same engine as the 6hp with a different carb, shorter leg, no charging system, and a different prop.

If you can, get the "elephant ear" prop from internet outboards. I have heard bad things about both internet outboards and online outboards, so take your pick!
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post #10 of 37 Old 04-01-2010
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I would point out that what is more important than HP is having the right prop. Most of these outboards come with a prop that is better suited to moving a light aluminum jonboat at higher speeds rather than the higher power, lower speed prop a sailboat needs.

Getting the right prop, so you can use the engine at WOT and have the power you need to keep the boat at "cruising" speed is essential.

How much does your boat displace? The typical rule of thumb is 1 HP / 500 lbs. of boat or so. I doubt your boat is 5000 lbs, so 9.9 is probably too much HP for it.

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