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  1. Z

    Yamaha runs rough 950-1150 rpms

    2002 TLRB 70 hp 2 stroke Yamaha runs rough from 950-1150 rpms. Had the carbs removed, cleaned and rebuilt. Twice. No change. Mechanic says it must be a cracked, bent or debris laden situation in the reed valves. Other than that RPM range the engine runs beautifully. Any thoughts as to the...
  2. Z

    rough running mid-range 70 TLRB Yamaha

    I have a low hour 2003 TLRB 70 HP Yamaha that has very rough running between (approximately) 1150 rpm and 1350 rpm; feels like it's running on 2 cylinders. I have a new gas tank, new fuel line and bulb, new fuel filter and have just had the carburetors professionally removed, cleaned...
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