Question about Light Outboard Motor Boat Bass Fishing Saltwater Base

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9.9 evinrude, yr 1990..runs like a new motor but wont throttle up past about half speed..once or twice it kicked in and took off but only for a few minutes then went back to half speed..sometimes it will even slow down to may a third of the speed it should have..no ticks or pops or backfires of any kind..runs great..any suggestions?

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Check the fuel tank for water.Squeeze the fuel line bulb and see if that gives a boost,and if it does you may have a blockage in the tank or in the carbs.If the bulb contracts when the engine is running,you have a blocked pickup in the tank.Check the vent on the tank is not blocked.The symptoms you give all lead to a fuel problem.Also.Check to plugs after you have run the motor.If one looks darker than the other.Change them both.Hope some of this may help you

Posted on Sep 03, 2010

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