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  1. K

    Mercury 850 starting problem

    I have a 75 model merc 850 (ser #4297882) that has an intermitant starting problem. When I turn the key or push in for choke, nothing happens in either mode. If I turn the key over several times, it will begin working again correctly, but the problem has gotten worse since the condition began...
  2. K

    Mercury 850 water pump/pressue

    Guys, I have a 1975 merc 850. I started it up in the yard tonight and the water out the p-hole had a weak stream. I pulled the tube coming out of the block down to the p-hole, and there is good water flow out of the block, but if I put my finger over it, I can stop the flow easily. Fished a...
  3. K

    Mercury 850 plug wire PN

    Guys, I am trying to find a plug wire set for a merc 850 thunderbolt ignition, serial # 4297882 (1975 model). There is a Sierra 22" universal set on here, PN 18-5229, but I can find a picture of the dist. cap side to see if they have the screw type connectors. Going to the Sierra (now...
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