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    2001 twin 250Yamaha ox66 rough idle stalls no acceleration

    Rodbolt or ? engines have approx 480 hours. starboard engine idles rough and will die and will not accelerate. port engine runs perfect. have checked, cleaned or swapped port to starboard the following parts: o2 sensors, vst with new filters, cdi unit, stater assemblies, plugs. fuel pressure...
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