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  1. merc850

    tilt/trim late 60's not working correctly please help

    You can bleed the cylinders by following these instructions
  2. merc850

    1963 mercury 100hp tower of power timing belt replacement

    Take the cover off the distrb. pulley and you'll see a small arrow, this arrow has to point at the line on the flywheel, turn flywheel until mark is inline with the dist. then lift off belt from pulley and line up the marks.
  3. merc850

    1966 Merc 1000 - Power Trim/Tilt Troubleshooting

    Did you check the fluid level? Follow these instructions
  4. merc850

    1970? mercury 800 thubderbolt

    Positive battery power to the side stud and negative to the case (ground). Check your serial Nr. to make sure the wires on this diagram are correct
  5. merc850

    Mercury Mark 58A Lower Unit Oil

    That link I gave you is to a site that has the parts manuals etc. the next page has the complete LU seal kit. If a Mercury dealer will undo the WP cover and pull the pump housing it will save you a lot of time. One thing that's easy to check is the shift shaft seal see dia. this site is for...
  6. merc850

    Mercury 650 3 cyl Link N Sync Questions

    Here are the manual steps and the top plug (Nr.1) is the only one you reference.
  7. merc850

    no lock nut to remove lower leg?? be gentle its my first time.

    Here's the Mercury manual method if it is rusted to the powerhead wooden wedges between the DSH and LU might separate them, go slowly.
  8. merc850

    Trick to removing the nut on pull starter??

    This the way - pay attention to the left hand thread nut it turns opposite ie. right to loosen!
  9. merc850

    1974 Mercury 50 HP - dies when decreasing throttle

    Did you do a compression test? Should be 100+ on each cyl. Did you check the wiring for corrosion especially between the distributor and switchbox? Here's the trigger check I would buy a Mercury manual if you want to keep the motor and repair it yourself. You can buy parts here...
  10. merc850

    1972 mercury 1400

    A lot of information has been debated about the octane needs of Mercury outboards; it says in the owner's manual "regular automotive gasoline" - this is from the manual personally I use regular fuel.
  11. merc850

    77 850 thunderbolt trim

    Sounds like the reverse lock is not holding: make sure it is turned full left. or it needs bleeding
  12. merc850

    whats with this nipple?

    This is a parts listing from 1975 850 Part 17 or 27 are at the bottom of the block and are bleed check valves attached to a hose that runs to the top bearing, just bought one last week from my Mercury dealer $14.
  13. merc850

    1966 Mercury 950SS _ Reverse Locking Mechanism

    Here's the manual method but follow these instructions for setting the shift up 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...
  14. merc850

    Shift cable 67 100hp merc

    This is from the 1965 manual The 1965 and newer manual is a must for keeping these old motors going.
  15. merc850

    Mercury 1500 "Tower Of Power" timing / idle question

    These steps are from the 1975 manual
  16. merc850

    1969 Tower of Power lower unit

    First I would check that the shift cam (at the rear of the unit) is still in place (I would replace it to make for surer shifting ) then turn the shift shaft so the cam is facing the back of the unit. Reassemble the unit, the carrier nut has to be torqued to 210 ft/lbs with a special tool - a...
  17. merc850

    1976 Merc 650-Pros and Cons to Rebuild

    Remove the transfer port cover (green arrow) and check the pistons for damage, you can push on the rings gently with a pencil to see if they are still springy and you will need a new gasket.
  18. merc850

    mariner 80hp not tilt lifting how to fill up

    Try following these instructions
  19. merc850

    1967 Mercury Thunderbolt 50HP Motor and Control Question

    Early 60's Mercs were white, later they went to black just use the controller that matches your motor
  20. merc850

    Mercury Shock Absorbers

    Re: Mercury Shock Absorbers Those shocks are meant to slow the motor rising out of the water if you strike an underwater object while underway, there's also a mercury switch on the powerhead that cuts off the ignition until the motor is down again. The two work together to prevent damage to the...
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