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  1. merc850

    1969 Mercury 650 2 stroke 4 cyl. Switch box swap

    No problem they used that system until 1976.
  2. merc850

    1969 Mercury 650 2 stroke 4 cyl. Switch box swap

    First you have to wire it correctly - the wires are color coded red to red terminal etc. Have you opened the ignition driver to see if the rotor and cap are in good condition? You unbolt it from its adapter and remove it.
  3. merc850

    1969 Mercury 650 2 stroke 4 cyl. Switch box swap

    The switchbox you have now is used with the Lightning energizer which generates the power to activate the box, the other type uses 12v to generate the spark and a trigger system to fire the coil. They are not the same.
  4. merc850

    1998 Merc 150 Stiff Steering

    What is the problem? pull the cables out clean tubes and outer cable sleeves, extend the cable assembly and clean and lube the inner liner. Use an anti-corrosion grease like Mercury's. put the cables back and grease the outer sleeves, grease the fitting for the swivel tube and the tilt tube...
  5. merc850

    Shift Shaft removed, now can't get back into gear

    To properly attach the LU follow these steps This is how I do it in about 60 sec.: Turn the LU shift shaft by hand counter-clockwise until it stops, then with Vise Grips tight on the bottom of the shaft turn it a few more degrees CCW until it clicks into a stop, this should be neutral - check...
  6. merc850

    62 merc 850 6cyl

    This might help you until you get a manual, the proper firing order should be on the back cover where the spark plugs are.
  7. merc850

    Mercury Green Tank KG5 Coil Adjustment?

    Try this site they do nothing but very old Mercs http://johnsoldmercurysite.com/phpBB3/index.php. I think the motor needs a complete tear down, there are needle and ball bearings inside that could be damaged not to mention the piston rings. You want a motor that will be reliable!
  8. merc850

    1972 Mercury 500 50 HP

    I can't watch!
  9. merc850

    Restoring a 1978 Mercury 900 90hp "Tower of Power" Need Help!

    You will need the serial Nr. before you try to get a manual, the Nr. might be on the clamp bracket, between the clamps, or on the block near the starter.
  10. merc850

    1957 mercury mark 10

    Try this company https://www.oldmercs.com/category_s/457.htm
  11. merc850

    Where should water come out if no tell tale?

    They put "pee holes" on the port side of the motor (left, looking from the back) yours might be clogged with sand, look at the bottom of the top cowling for the hole and push some wire into it to see if it is clear.
  12. merc850

    79 mercury inline 6 help

    You have to set the throttle pickup levers correctly; you can't set the low speed on muffs it must be done warm, in the water in Forward around 900-1000rpm
  13. merc850

    Mercury old style tnt cylinder disassembly 1977

    Is it the 2 ram external type? If so here's the manual page: work in a clean dirt free environment!
  14. merc850

    Classic fifty lock cam pic in service manual

    Neutral is easier to assure shifter alignment, this pic is from 1975-9 manual
  15. merc850

    Coil trouble

    I noticed last summer that my motor wasn't running as it normally did so I bought new plugs, and checked the timing; when I ran the motor up to the throttle pickup line it was alright but after that to full throttle the timing mark jumped all over the place. The motor ran for the rest of the...
  16. merc850

    1970 Mercury 115 Distributor rebuild

    Be careful do not put pressure on the sender arm! and mark the rotor side before removing.
  17. merc850

    7.5 Ignition Issue

    Have you followed this wiring diagram maybe there's a crossed wire somewhere
  18. merc850

    Help me with timing 65 Merc

    This might help but you need the pointer, maybe you could make one. or this one for non-belt driven
  19. merc850

    1971 Mercury 650 Revival

    We really need the serial Nr. here's the wiring for a 4 cyl. 650 with Thunderbolt ignition. The red and white wires on the switchbox (left) are the energizers, red for power all the time and white for run power.
  20. merc850

    1970 Mercury 115 Distributor rebuild

    If you take the dist apart you can use a Dremel tool to remove the potting compound around the wire connections then, solder new wires to the circuit board. The rotor is molded onto the shaft so don't try to pull it off and before you remove the disk print the word ROTOR on the rotor side for...
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