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    Blown OX66 - Thanks for the advice Rodbolt

    First, thanks for your advice Rodbolt and others. Here's an update on my "knocking" problems on my 2001 250 Yamaha. 200 hours and looks like I burned a piston / cylinder. I made some posts here while trying to figure out why the motor was "ticking". (and it wasn't the O2 sensor draw tube)...
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    Rodbolt - Engine Knocking Yamaha ox66

    You out there Rodbolt??? I have a 2001 Yamaha 250 OX66 with 225 hours. Well maintained and runs great. Unfortunately I have begun to notice a tapping / knocking noise at idle. It continues through the power band. Took it in to a dealer introduced me to the engine salesman even before he...
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    Wrist pin?

    What's the best way to diagnose a bad wrist pin? I have a slight tapping noise coming from the block (250 OX66 with 225 hrs). It's not the O2 draw tube as I just replaced that.
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    Yamaha ox66 Tapping Noise

    I have a 2001 250hp ox66 Yamaha. It has 225 hours on it. Last week I took it out and while running at 4200rpm's thought I hit something soft (like some floating grass, algae, or a crab trap line). The rpm's fluctuated a bit so I brought it back to idle. It stalled. I ended up checking the...
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