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    Need advise on merc 350 260 please

    I have mercruiser 350 260 that has water in the oil and was hydrolocked. I pulled the plugs and had some water on top of the cylinders .. I also check the compression due to lacking power and found no compression on one cylinder. I pulled the valve covers and had a stuck valve and obvious...
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    Mercruiser 350 260 thunderbolt iv having fuel and or ignition problem

    So I am in need of some help. Motor is 87 350 260 with thunderbolt iv and alpha one. in neutral the boat idles fine and can rev up as far as You want no problem. Under load different story. Here is the history -Boat dies under more than half throttle. Keep it under half throttle and its fine...
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