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    1982 merc 4.5 revs then dies

    I am trying to help my buddy with his 4.5 merc. It will only start with the choke. With the choke off it revs to about 3000 rpm then stalls. It does not matter what throttle you give it, It just dies.I am thinking a major air leak, but you can't start it with the cowl off.(recoil is in the...
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    Extra gaskets in carb kit?

    Hi ,I disassembled the carb on my 87 mercury 9.9.There are 2 extra gaskets for the fuel pump.Was something not put together properly? Are these for a different application? Does anyone have an exploded view of this carburetor? It seems the extra gasket is made from a very thin membrane and it...
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    What is the running concern if a reed valve has a rust hole in it?

    I have a 1987 mercury 9.9.The engine runs perfect at full speed.At very low speed (trolling),I cannot get it to idle.I took the carburetor off to clean when i looked at the reed valves.Two had corrosion.I took out the reed assembly and held it up to light.There is a pinhole rusted through.I have...
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    8? mercury 9.9

    Hi everyone.I have a mercury 9.9.The serial # is A727703. Does anyone know the year and what are the proper spark plugs to go in this engine?Is this the yamaha block? Are there any cocerns with this motor.I have two identical motor and both run poorly.
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    year for 6 cyl 90hp

    I have searched the links you have in the sticky for year but either i am not looking correctly or ?.The serial # is 4699983
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    idle prop pitch?

    I am trying to downrig with my 50 hp merc.I am currently using a 13p 10 1/4"?nd I have to rev pretty high to maintain 3 mph.I have a 15p 10 1/4" and a 15p 10 3/4" spare props.Does anyone have an idea which,in theory,will drop my rpms the most or will a 15p raise my rpm to obtain the same speed?
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    87 mercury 9.9hp 9"x9 pitch

    Hello I have a 12'aluminum boat.With the boat empty this engine works very well.When I install it on my 14',loaded with fishing gear and 400lbs of occupant, all it does is bog,and push water.It will not plane.I am looking at a 3 blade 9" x7" merc prop,thinking this may help.At a cost of $150.00...
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