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  1. merc850

    Kiekhaefer Mark 58E Lower Unit Questions

    Here's the greasing instructions
  2. merc850

    1977 Mercury 115 rebuilt and video for idle run, suggestions please

    Water cools all the exhaust areas and comes out of the "holes" you are looking at. Study this cutaway the exhaust goes down the "tube" and water surrounds it.
  3. merc850

    What is a "Merc 300"

    Yes it's a 1960 35hp, comp. for those motors should be approx. 110 psi. An old motor is only a good deal if it includes controls, prop or you have another one or source for parts.
  4. merc850

    1st boat 73 merc 850 wont rev.

    Trigger T/S
  5. merc850

    50 HP Mercury fuel delivery problem

    If the bulb is working properly it should pump fuel with the connector detached and inflate after each pump, the same will happen when attached to the motor but after a few pumps it will stay hard. The check valves in the bulb open when the motor is running to let the fuel pump draw fuel thru...
  6. merc850

    1976 Merc 850 4 cyl Tach Pole?

    6P and you have to hook it up to one of the YELLOW/RED wires on the rectifier not the red one and make sure it is well insulated, connect the power lead to a switched + and the - to any good ground; these connections should be under the dash somewhere.
  7. merc850

    1150 power trim and tilt hoses

    You can adjust the limit switch so that the motor stops at at the right out angle using just the "out" button. This has to be done on the water Loosen bolt "C" in image and turn "B" all the way in - trim the motor all the way in and accelerate to full throttle then trim it out until the motor...
  8. merc850

    1974 Merc 200 20hp pull cord broke

    Just keep all the parts together as 1 unit.
  9. merc850

    Mercury 80p

    The proper sparkplugs look like this; the black connector is for the electrical hookup from the control box, if you didn't get one with the boat go back to seller and demand one. The compression should be 120 psi and the difference between cylinders should only be 10%. I don't have a good...
  10. merc850

    1974 Merc 200 20hp pull cord broke

    I don't know what the "dill" is but here's a diagram of the parts - you have to bend a tab on "2" down then hold the screw in the nut while you turn the nut clockwise do this carefully with something under part 15 so the spring doesn't fly out. Keep the assembly together while you unwind the old...
  11. merc850

    1st boat 73 merc 850 wont rev.

    There are 2 bearings in the distributor housing that are sealed - permanently lube ones 45 yrs ago, so maybe the bottom one is leaking (Nr.22 in diagram) if this is the case the bearing will seize and and the timing belt will break.
  12. merc850

    starting '71 135hp

    You have to connect + power to the switch box (red terminal should be connected all the time and white) and ground the whole motor, you also have to advance the throttle lever above the cable attachments on the left side and use the manual choke; this is not a good idea you should connect some...
  13. merc850

    196? Merc 650 need help please

    You can find the ser. Nr. here (maybe covered in oil)
  14. merc850

    Lower unit interchange

    The 1975 will be a splined shaft maybe you can just switch the upper shift shaft. This diagram is from a '75 850
  15. merc850

    1st boat 73 merc 850 wont rev.

    You can run in F only but you should have N too for safety, I've worked on many Mercs and this is weird; the image below shows how the shift is done - the shiftshaft turns CCW to push the shift dog into the reverse gear then CW to go back to N;F those are tough parts and can take a lot of abuse...
  16. merc850

    1st boat 73 merc 850 wont rev.

    The idle screws should be set 1 1/4 turns out then with the motor in F in the water at about 800 rpm turn them slowly in and out until the motor runs smoothly then give it full throttle and see if it accelerates smoothly, if not give them a 1/4 turn more. I still think that the throttle is not...
  17. merc850

    Mounting a power trim pump

    Here's my drawing of the factory bracket, from memory, for anyone who is in a similar situation
  18. merc850

    1975 500 Powerhead removal and general work.

    The choke is supposed to be stiff so it doesn't fall down, here's a wiring diagram the only black wire is a large gage one that grounds the engine.
  19. merc850

    PT pump bracket

    Here's a drawing of the factory pump mounting bracket for the external pump assembly
  20. merc850

    1150 power trim and tilt hoses

    This is my factory bracket (drawn from memory) it can be easily made from 1/8" aluminum and will provide a solid mounting considering the G forces involved.
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