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    Replace water pump impeller

    I'm about to replace the water pump impeller on my 1975 merc 200 (20 hp ob). Beside the impellar, are there any other parts I should consider replacing as long as I have the unit apart. Are there parts that must be replaced when the impeller is replaced? I'ld like to have everything available...
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    Starting Merc 200

    My 1975 Merc 200 (20 HP) has remote electric start. If I wanted to start manually, (with the pull start) I would assume I need to put the key in the run mode. Do I need a battery or will it start and run without the battery?
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    Mercury control Merc 200

    My 1975 Merc200 has remote control shift and throttle. It's the typical Mercury control for that year and model. When shifting into gear,does the shift lever also control the throttle, or are the shift and throttle levers completely independent?<br />The reason I'm asking is that they seem to...
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    Reed valves

    Can someone please explain the functions of reed valves in a 2 cycle engine? I have a 1975 Merc 200 (20HP). Where are they located. Are they part of the crankcase. How can I tell if they are good (functioning?)<br />Reason I'm asking is because I don't seem to be getting gas to my combustion...
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    Setting floats on 1975 Merc200 (20HP)

    The specs call for a 1/4 inch dimension between the bottom of the float and the base of the carb, with the carb upside down. Where on the float do you reference the 1/4 inch dimension (outer edge, center of float,?)<br />It then calls for a measurement of 1/32 to 1/16 from the bottom of float...
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