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  1. #1

    Default 1998 Yamaha outboard motor 200 2stroke has very little power and is a gas hog

    My 1998 Yamaha outboard motor 200 2stroke has very little power and is a gas hog, is there anything we can do to get more power out of it and better gas mileage. It's on a pontoon and gets about 1 mile to the gal and will go 15 miles per hour full out. Please help! Thanks

  2. #2

    Default Re: 1998 Yamaha outboard motor 200 2stroke has very little power and is a gas hog

    Reply back with complete model number.

    Speed (mph) is a poor reference tool to use when troubleshooting. Simply because speed can vary to a great degree caused by numerous variables. Rpms is a more valued tool you'll want to focus on. 15mph does sound very low for a 200hp. However, speed is relative to the load the engine is pushing. For all I know your pontoon weighs 2 tons.

    So, how many rpms are you seeing at WOT? I believe the spec rpm range for your engine at WOT is 4500-5500. I would guess from what little you've detailed that 15mph is not producing 5500. But I prefer not to guess.

    90% of the time when an outboard is struggling it's related to the fuel system....whether its fuel, filters, hoses, primer bulb, carbs, etc. So I'd start troubleshooting there.

  3. #3

    Default Re: 1998 Yamaha outboard motor 200 2stroke has very little power and is a gas hog

    If its on a pontoon it will probably have a completely wrong prop on it.

  4. #4

    Default Re: 1998 Yamaha outboard motor 200 2stroke has very little power and is a gas hog

    Quote Originally Posted by connemaraisland View Post
    If its on a pontoon it will probably have a completely wrong prop on it.
    I'm guessing the subject matter he's inquiring about isn't top priority. As he never responded to my reply I posted a few weeks ago.

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