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Old 05-06-2017, 21:13   #31
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Re: advice please on 15 hp versus 9.9 hp outboards

Guys so much good advice. Can't put another 2 stroke in. Lake Tahoe has banned them. Motor doesn't sit in end of boat but forward of the stern in a well. I still am weighing in on different manufacturers. Thanks for all the posts about props, hp, etc. am seriously contemplating the remote controls. Engine stays on the boat unless I store her. Guy told me yesterday about his Yami 9hp disappearing in the marina when he was gone for a month. That is just so sad.

How long before outboard companies make a feathering prop?
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Old 06-06-2017, 02:37   #32
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Re: advice please on 15 hp versus 9.9 hp outboards

Hello. The technicians at Honda marine told me that the 9.9 4 stroke outboard is really a de-tuned 15 HP, and that conversion of a 9.9 back to
15 HP is not cost effective. I have no knowledge about other manufactures,

From a purely Canadian perspective. On September 15th 2009 the Canadian government brought in a a regulation requiring all pleasure Boat operators to take a test and apply for a boat operators license. IF the engine power is over 10 HP. So by using a 9.9 those who do not want to get a license can avoid that requirement.
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Old 07-06-2017, 11:10   #33
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Re: advice please on 15 hp versus 9.9 hp outboards

Just got off the phone with the Suzuki rep. As one of the responders to my question noted the Suzuki 9.9 are pretty bullet proof to the alcohol issues that plague small boat outboards. Suzuki has gone to a fuel injected engine. That eliminates the carburetor.


You know I was just thinking. I have a 200 hp Hayabusa sitting in the garage that I haven't been riding much. Maybe I can disembowel her. Strap it on the back and use a long spinning shaft like they use in asia to move around in....hhmm....Waddya think guys?
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Old 07-06-2017, 12:09   #34
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Re: advice please on 15 hp versus 9.9 hp outboards

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Originally Posted by alansmith View Post
Just got off the phone with the Suzuki rep. As one of the responders to my question noted the Suzuki 9.9 are pretty bullet proof to the alcohol issues that plague small boat outboards. Suzuki has gone to a fuel injected engine. That eliminates the carburetor.


You know I was just thinking. I have a 200 hp Hayabusa sitting in the garage that I haven't been riding much. Maybe I can disembowel her. Strap it on the back and use a long spinning shaft like they use in asia to move around in....hhmm....Waddya think guys?
Hello, to answer your question, get the 9.9 High Thrust Yamaha. I push my 39', 10 ton cat ketch with a one and get 5.5 knots in a flat calm. If I run the second one at the same time I have done 6.5 knots against 20 knots of wind and 2' seas. And these were used engines when I bought them 10 years ago. Since then we have gone down the rivers from Chicago, parts of the ICW, the Erie canal, the St. Lawrence and numerous trips to Nova Scotia. To be clear though, these are the pre-2007 de-tuned 15hp engines. Starting in 2008 the 9.9s became up-tuned (?) 8's, ie. smaller displacement blocks.
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Old 09-06-2017, 11:03   #35
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Re: advice please on 15 hp versus 9.9 hp outboards

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Originally Posted by coastalexplorer View Post
From a purely Canadian perspective. On September 15th 2009 the Canadian government brought in a a regulation requiring all pleasure Boat operators to take a test and apply for a boat operators license. IF the engine power is over 10 HP. So by using a 9.9 those who do not want to get a license can avoid that requirement.
I'm thinking you may be confusing the current requirement of an Operator Licence vs. a Boat licence.

In Canada, you need an operators licence regardless of engine H.P. . . . I think they should call this a 'Power Boat Competency Card' as opposed to a licence. Even at that, I think it is pushing the limits of boat operating knowledge.

Back in the 50's, (& maybe even before) the law required an owner to licence his boat if the engine power was 10 h.p. or more. The 9.9 designation came into being as a means of circumventing that requirement & I believe it may still apply for all I know . . . We're talking small run-abouts & dinghy's here.
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Old 09-06-2017, 11:47   #36
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Re: advice please on 15 hp versus 9.9 hp outboards

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Change a part in the carburetor of a Yamaha 9.9 four-stroke and you get 15Hp.
Some guy here in Florida specializes in the surgery and buys up every 9.9 he can find.
The part cost about $25.
I bought a 15HP from him last year, runs strong no issues.
This is true a 9.9 is just a detuned 15.
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Old 09-06-2017, 12:00   #37
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Re: advice please on 15 hp versus 9.9 hp outboards

More hp is better when it comes in the same package. If you have an ob motor mind if it is not too heavy to handle.

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Old 09-06-2017, 12:01   #38
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Re: advice please on 15 hp versus 9.9 hp outboards

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If ya are going to haul around an 80 lbs lump on the transom, might as well get full power out of it by going for 15 instead of 9.9. One day it may come in handy.
Yup, and you can tear out the transom on your dingy rated for 10hp , lol.
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Old 09-06-2017, 12:33   #39
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Re: advice please on 15 hp versus 9.9 hp outboards

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Yup, and you can tear out the transom on your dingy rated for 10hp , lol.
True enough, putting too much of an outboard on a dink that has a Max HP would be silly.
Not sure anybody suggested or recommended exceeding any limits..?
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Old 09-06-2017, 12:42   #40
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Re: advice please on 15 hp versus 9.9 hp outboards

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This is true a 9.9 is just a detuned 15.
After further reading it is not that simple.... sorry
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Old 09-06-2017, 12:48   #41
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Re: advice please on 15 hp versus 9.9 hp outboards

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True enough, putting too much of an outboard on a dink that has a Max HP would be silly.
Not sure anybody suggested or recommended exceeding any limits..?
True , I think it was not mentioned as you say. But I couldn't help thinking of someone saying , but it says 9.9 on the cowl !
I remember a neighbor kid at the cottage in summer who just couldn't resist putting dads 25hp on his little punt, it did not end well.
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Old 10-06-2017, 00:47   #42
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Re: advice please on 15 hp versus 9.9 hp outboards

I found this to be interesting.
Nissan NS9.9B2 9,9hp
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