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Old 12-27-2011
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9.9 Outboard Experiences

I've decided it's time to replace my auxiliary, a pull start '98 Mariner 4 stroke. So I'm looking at new electric start 4 strokes that come in 25" shaft lengths. The 9.9 is big enough. My question does anyone have experience with current brands: Mercury, Tohatsu, Honda, Suzuki. Thanks for anything that helps sort them out.
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Old 12-27-2011
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Believe small Mercury, Tohatsu, & Nissan are the same engine...all made by Tohatsu. These have the reputation of being the easiest to work on, but also the ones that need work the most.

Honda's have a reputation for being heavy for the hp they produce...but the most efficient and most reliable. But when they break down, its pricey.

I've never seen a 9.9 hp suzuki out in the world...I didn't even know they existed. A quick Google search makes me feel like the small Suzukis are rebadged Tohatsu, just like small Nissans and Mercurys.
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Last edited by night0wl; 12-27-2011 at 04:16 PM.
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Old 12-27-2011
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I'd suggest adding Yamaha to your list. Far more reliable than other brands mentioned and way less weight than Honda. I also find the Honda an incredibly noisy engine. We have had a 9.9 Yamaha on our 27 Catalina for years and it has been a great engine. Pushes the boat along at about 6 Knots at under 1/2 gallon/hr. Spare parts are readily available as well. Night0wl is correct in saying Nissan, Tohatsu and Mercury are the same engine. I also run a Yamaha 50HP on our commuter boat. In our marina Yamaha's are on 80% of the commuter boats.

I dont think Suzuki is a re-badged tohatsu and from the few owners I've spoken to would consider adding this engine to my list as well.

Last edited by delite; 12-27-2011 at 04:32 PM.
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Old 12-27-2011
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What about Yamaha? I have two yamahas, including a 9.9 electric start. I haven't owned them long enough (less than a year each) to really comment on them, but I have generally been happy with their quality so far. I am interested what people with more experience say about the Yamaha.

(the 9.9 is probably somewhat less than 10 years old, though well maintained. The only bug is that it won't draw in gas properly when it is idling, so after a few minutes it will shut off. The remedy is to pump the bulb a few times every minute or so (more if the engine is cold) when idling. This is a PITA when entering/exiting the marina, but not too bad... figuring out how to fix this is on that loooong boat maintenance list I keep in my wallet...)
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Last edited by peterchech; 12-27-2011 at 04:36 PM. Reason: you beat me to it delite :)
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Old 12-27-2011
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definitely yamaha. work great and easy on your pocket.
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Old 12-27-2011
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Quote:
Originally Posted by peterchech View Post
What about Yamaha? I have two yamahas, including a 9.9 electric start. I haven't owned them long enough (less than a year each) to really comment on them, but I have generally been happy with their quality so far. I am interested what people with more experience say about the Yamaha.

(the 9.9 is probably somewhat less than 10 years old, though well maintained. The only bug is that it won't draw in gas properly when it is idling, so after a few minutes it will shut off. The remedy is to pump the bulb a few times every minute or so (more if the engine is cold) when idling. This is a PITA when entering/exiting the marina, but not too bad... figuring out how to fix this is on that loooong boat maintenance list I keep in my wallet...)
Unless you have an extra long fuel hose with the tank well below the motor it should idle with no problem. Possibilities:
1. loose fitting tank / motor connectors or hose clamps
2. Make sure tank is venting properly, take off the tank filler cap to test
3. Partially plugged filter(s), including the screen on the tank pick up tube
4. If it has a diaphram type fuel pump, bad diaphram
5. Carb float level is incorrect
6. Idle fuel mixture is too lean
7. Idle speed set too low
8. Anything else that could cause an air leak in the system
9. A kink somewhere in the lines, restricting flow at low speeds
10. A fuel line that has begun to de-laminate on the inside

Let us know what you find

Dabnis
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Old 12-27-2011
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Quote:
... The remedy is to pump the bulb a few times every minute or so (more if the engine is cold) when idling. This is a PITA when entering/exiting the marina, but not too bad... figuring out how to fix this is on that loooong boat maintenance list I keep in my wallet...)
Have the same problem with my 9.9 Evinrude. It's stranded me overnight because of this issue. Nowadays, I pump the little bulb a lot. Hoping fuel pump replacement kit will take care of the problem.

Defintely would like to get a new Yamaha by next Spring.
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I dont think Suzuki is a re-badged tohatsu and from the few owners I've spoken to would consider adding this engine to my list as well.[/QUOTE]

Suzuki is definitely a different motor. I've had a Tohatsu 3.5, now have a Suzuki 2.5, and I wish the Suzuki WAS a Tohatsu - it would run properly.
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Sorry to hear that markSF. Has the dealer been any help? One of the better selling points of the Suzuki I thought was the warranty. Not much use if the dealers are no help.
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I've had a Tohatsu 9.8 for a season now, purchased from Discount Marine and Boat Supplies - Inflatable Sales - Defender (btw, their end of year sale is going on now) and I'm very pleased with it. Had a Suzuki 6 hp a few years ago, I was never fond of it. I've also had the Honda and didn't care for it either.

The Tohatsu, Mercury, and Nissan in the 9.8/9.9 hp are are pretty much the same, the Tohatsu being the less expensive and the Merc having the most bells and whistles.

When I was researching which outboard to buy, I called several outboard engine repair shops and most said the Honda's are "over engineered", the Mercs are also a bit overdone, the Tohatsu was the most recommended brand. I also hear great things about Yamaha, but seems they are typically the most expensive or similarly priced to a Honda? Not positive about though?


BTW, I believe the difference in the Tohatsu 9.8 and Merc 9.9 is max RPM?

Some quick search on Defender, the first one is about what I paid for mine two years ago:

Tohatsu $1775 (2011 model) Tohatsu 9.8 HP 4-Stroke Outboard Motor

Tohatsu $2100 (2012 model) Tohatsu 9.8 HP 4-Stroke Outboard Motor

Merc $2476 (2011 model) Mercury 9.9 HP 4-Stroke Outboard Motor

Merc $2755 (2012 model) Mercury 9.9 HP 4-Stroke Outboard Motor

Yamaha $2811 Yamaha 9.9 HP 4-Stroke Outboard Motor

Honda $2911 Honda 9.9 HP 4-Stroke Outboard Motor
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