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  1. merc850

    1963 Mercury 650 restoration

    The one with controls looks like the better buy - controls may be hard to find and they have different wiring schemes. A Mercury dealer should have the manual C-90-25500 or oldmercs.com will; since there's rust on the flywheel and starter it looks like it may have sat out in the weather which is...
  2. merc850

    1963 Mercury 650 restoration

    OOPS I read the 700 column in the manual try this:
  3. merc850

    1963 Mercury 650 restoration

    First buy a Mercury manual 1965 and prior, next check the wiring for, corrosion in the motor and the control harness; Post some photos for analysis (200k). I believe this is the wiring diagram for a 650 note the 2 coils - it is a auto type ignition (like granpa's old chevy) no magneto. ​
  4. merc850

    1987 50 hp Merc dual ram trim/tilt stuck in up

    Sounds like the pump isn't working because it pumps fluid into the down side of the ram. All I can say is remove the bleed screws and push it down.
  5. merc850

    What control for a 1972 Merc 1140?

    Either box will work but why not match the motor decals. (This forum is limited to 200k images). The boat wiring harness has to match the engine side and there are several types, but all you have to do is swap wiring from one box to the other. I don't have a wiring diagram for the '72 but this...
  6. merc850

    1973 mercury seal leaking gas

    Your motor might have a fuel filter on the starboard side of the block which could be leaking (yellow section) pump the bulb and watch for leakage.
  7. merc850

    1959 Mark 58A= Cowl emblem revoveable

    Try this.
  8. merc850

    Kiekhaefer rectifier

    The spade terminals should pull off with pliers. Other solution is to unbolt it from the bracket. You should test it to make sure it's OK. You can use this procedure
  9. merc850

    Mercury 140hp. Serial number 3424016

    Check the lower unit for water and replace the waterpump impeller before running, the plugs should be good - even fouled ones will fire with that ignition system. I have a 1975 850 with Power Trim and it's great! Parts are available if you look, Mercury has bearings, paint, seals etc. This is...
  10. merc850

    1976 mercury 1150 carb removal!!!

    This diagram doesn't show any gasket (from manual) so I'm not sure.
  11. merc850

    Mercury 140hp. Serial number 3424016

    Do not attempt to check for spark unless you follow this wiring diagram the + and - cables have to be connected to prevent destroying the switchbox and/or rectifier.
  12. merc850

    wiring for quicksilver box

    I have a manual for Commander controls; (any bilge pumps, depth finders etc. should be wired directly to the battery thru a fuse) here's one page:
  13. merc850

    86' 35 hp Merc Electric Choke not Functioning

    If this diagram is like your setup the plunger goes into a hole in the choke shutter, you might have to undo the nut that holds the grate and shutter off remove the shutter and place the plunger (6) stud into the top hole of (25) then turn it up and put shutter and plunger back into position...
  14. merc850

    1961 Mercury Merc 500

    Use the serial Nr. to look for parts/info; this is a 1961 500:
  15. merc850

    1977 power tilt hose connection to cylinder leaking

    Here are the bleed screws and method for bleeding - some units used Allen screws for the bleed screws:
  16. merc850

    Mercury 1979 50hp - What is this part called? Trouble finding information on it.

    Don't know why but it didn't load her it is :
  17. merc850

    1976 mercury 1150 inline carbs!

    So you don't have the control box/wiring how did you run the motor? I use Mercury's Power Tune to clean a motor's insides (decarbon) and exterior, safe on plastics and paint and very effective. The carb settings are:
  18. merc850

    1968 mercury 500 no spark

    If you have Tbolt with a Lightning Energizer (I am sure you do) here's an overview of its design and function.
  19. merc850

    Battery information

    Lots of questions involve batteries and rectifiers, this might help:
  20. merc850

    Older Merc Trim Issue

    You can take the upper cap off by undoing and removing the 2 thru bolts and carefully lifting up the cap; be careful there's a bearing ball at the end of the shaft. Check the brushes for dust and movement and clean with a toothbrush. I bought the whole assembly from my Mercury dealer for $60.
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