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  1. merc850

    Censored?

    I doubt this will pass!:D Mod Edit: C'mon dude, what were you thinking???
  2. merc850

    Family Presents

    All I want for Cmas is Amsoil:D
  3. merc850

    Does this LU oil look bad/milky to you?

    Looks like the oil is coming from the top of the LU from the waterpump base I would remove the LU replace the impeller (if it's old) and do a pressure test.
  4. merc850

    Rectifier/Regulator

    The rectifier is a full wave one - 4 diodes; the regulator is a secret! This is how I added a regulator to my 850 works great holds V to 13.5.
  5. merc850

    Kiekhaefer Airlines

    Hey that's fantastic I have the book; any chance you could post a picture?
  6. merc850

    Kiekhaefer Airlines

    Here's a page from "The Mercury Messenger" Nov. 1954 when things were really jumping! Before Windows Vista. You are a real Merc fan if you can spell Kiekhaefer without notes!
  7. merc850

    1978 thunderbolt 1150 remove roller bearing

    I think that warming it up first might help you'll need a press and something that fits the outside race.
  8. merc850

    72 Mercury 500 No Spark

    You pry it out with 2 screwdrivers 180* apart, there should also be an O-ring on the pump housing.
  9. merc850

    1984 mercury 50 hp lower crankshaft seal

    It's recommended that you use Loctite on the shell for sealing and adhesion.
  10. merc850

    Mercury 150 not performing well under load and drinking gas.

    "without any load to 6000 plus rpms" is not recommended, maybe you damaged it.
  11. merc850

    72 Mercury 500 No Spark

    It was a 14' runabout that I had for a few years; don't know the voltage but anything is a start. Here's my current rig .....
  12. merc850

    72 Mercury 500 No Spark

    The Ignition driver provides the power for the switchbox so it doesn't need to have 12v going in to it; this is an electronic version of a magneto. All you need is a wire to ground it out for stop. The 500 is a great motor smooth running and powerful and they made them for decades! Have you...
  13. merc850

    72 Mercury 500 No Spark

    All I have is the 1975 year but it should? be the same; did you check the belt?
  14. merc850

    72 Mercury 500 No Spark

    Yes the cowl must be grounded as well as the ignition driver and all are grounded to the neg side of the battery via the starter. None of the posts on the switchbox should be grounded for RUN. Disconnect the ground from the mercury switch until engine is proven to run. This motor uses the...
  15. merc850

    72 Mercury 500 No Spark

    Clever bit of engineering I have the 1975 wiring diagram for your reference it might be different than your motor
  16. merc850

    1976 Mercury 850 value

    The internal harness is the most important as it carries power to the starter (lots of current) Mercury Marine 414-3369 Internal Engine Harnesses - CDI Electronics Price: $203.59 from this site Wiring diagram
  17. merc850

    1976 Mercury 850 value

    Replace the motor wiring harness and it will be worth more and be safer too.
  18. merc850

    1976 Mercury 850 value

    1975 and older used a distributor.
  19. merc850

    Mercury 9.8 has spark, won't start

    Are the plug wires on their correct plug?
  20. merc850

    1150 Link & Sync Question

    The hull looks like a displacement type, a V type hull will attain a higher speed as it rises up out of the water; so that could be an issue. "generic mercury/quicksilver unit" is it an alternator driven or switchbox one?
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