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  1. J

    merc 650 prop spins freely

    My merc 650 will not drive in forward or reverse. It worked fine last season but was not running well due to mu high elevation ( over 7500'). I re jetted it yesterday and took it to the lake this morning and the motor runs great but the prop wont spin under power. The water pump is still...
  2. J

    Jets ?

    I have a 1963 mercury 650, 4 cylinder, 2 stroke. I live at high elevation and the motor seems to be running really rich. It pooches out when you give it throttle. From what I've gathered the idle mix is adjustable, but the high speed jet is not. Is there replacement jets ? Is there another way...
  3. J

    boat wont plane

    I have a 1985 larson 17' open bow with a 1963 mercury 650 4 cylinder 2 stroke. I cannot get the boat to plane. The lake we go to is at 6428' elevation. I have tried different trims, loaded, unloaded. Getting pretty frustrated. Please help! The prop is a quicksilver 13 1/2-11. # on prop is...
  4. J

    Does a 1963 mercury 650 have a tell tale?

    I have a '63 merc 650 4 cylinder. When i hook it up with muffs, i get water out of the prop, but i cant find a tell tale hole anywhere. The motor seems to stay nice and cool, but i want to be sure that all is good before i trust it out on the lake.
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