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Forum Member
Posts: 127
Member Since:
7/29/2005
Location: Tybee Island Ga. | I've been on here alot lately because of my upcoming sea trial on that 21 Hydra Sport walkaround,I'm going to try out an 2003 150 hp carbed Yamaha.Are they good motors?I heard they are gas guzzlers,but aren't all outboards.Any info about these engines would be helpful.Thanx once I decide on this boat and motor I'll be out of everyone's hair Thank You  |
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Posts: 4105
Member Since:
1/2/2006
Location: Way out west | Mechanically, there is nothing wrong with the engine you are asking about - except for the carburetion instead of fuel injection. It is going to consume about 20% more fuel an equivalent fuel injected motor. In trade, it will be easier to maintain and less fussy about fuel quality. And while all boats use more fuel than cars, outboards have gotten significantly more fuel efficient over the years. |
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Posts: 2875
Member Since:
8/28/2001
Location: Madison, CT | It's a great engine. Very reliable if you do what you should. Keep your filters clean and don't let the gas sit in the carbs for a long time unused. (as in don't let her sit for 3 months) |
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Posts: 8314
Member Since:
8/8/2003
Location: NJ & FL | Motor is bulletproof. Period. Basically unchanged since 1984 with darn good reason! |
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Posts: 1176
Member Since:
8/2/2006
Location: Miami Beach, FL | Afishinado - 1/8/2008 8:18 AM
Motor is bulletproof. Period. Basically unchanged since 1984 with darn good reason!
EXACTLY!!!! |
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Posts: 1324
Member Since:
11/1/2007
Location: St Petersburg FL | I had a 1997 at one point. The term "bullet proof" does come to mind. Sucked a lot of gas....a lot. Very powerful and LOUD. I tend to run pretty fast when conditions allow, and my ears would ring for a few hours afterwards.....forget about any conversation in the boat. But the motor will definitely get you there.
Edited by TheShortAnswer 1/8/2008 9:07 AM
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Posts: 2734
Member Since:
4/9/2002
Location: Columbia,S.C. | They are very good engines but they do love the gas dock.get a qualified tech to check it out for you.
On a side note i have run alot of carb and fuel injected engines and never found any difference in fuel consumption. The fuel injection does make starting the engine up much easier.going with a DI 2 stroke or a 4 stroke should give you a 25 to 30 percent increase in fuel milage.
Good luck |
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Posts: 890
Member Since:
8/19/2005
Location: Portsmouth, VA. | SCAngler - 1/8/2008 9:27 AM
They are very good engines but they do love the gas dock.get a qualified tech to check it out for you.
On a side note i have run alot of carb and fuel injected engines and never found any difference in fuel consumption. The fuel injection does make starting the engine up much easier.going with a DI 2 stroke or a 4 stroke should give you a 25 to 30 percent increase in fuel milage.
Good luck
Someone correct me if I'm wrong, but my understanding of why a fuel injected 2-stroke outboard is more fuel efficient than a carbed 2-stroke goes something like this. On a carbed 2-stroke, fuel enters the cylinders through the intake ports. But as the piston starts to carry the fuel mixture upwards, some of the fuel escapes through the exhaust port before the piston has a chance to seal it off. On a fuel injected 2-stroke, you still have intake ports for air and the exhaust ports but the fuel is injected at the top of the cylinder so there is no way for any raw fuel to escape out the exhaust. Thats why a fuel injected 2-stroke is so much cleaner than a carbed one too. I know its a lot more technical than that but I think thats the jist of it. |
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Yamaha ouboard
