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  1. merc850

    1969 merc 500 ignition issues? might sound familliar?

    Re: 1969 merc 500 ignition issues? might sound familliar? Carb float setting Lube intervals
  2. merc850

    1969 merc 500 ignition issues? might sound familliar?

    Re: 1969 merc 500 ignition issues? might sound familliar? Here are the specs and the wiring diagram for Lightning energized motors and the test procedure and values.
  3. merc850

    1969 merc 500 ignition issues? might sound familliar?

    Re: 1969 merc 500 ignition issues? might sound familliar? The rectifier on that engine is only part of the charging circuit it doesn't run the ignition, have you checked the cap and rotor for corrosion/water etc? If you remove the cap don't try to remove rotor from shaft it's molded on. You can...
  4. merc850

    Need help with mercury 20hp serial#/remote setup

    Re: Need help with mercury 20hp serial#/remote setup If it is a 1975 this is the type of control box of that era, there are white ones too on ebay if you don't mind painting.My 1975 manual lists the kit as A-46455A3 so it will probably work.
  5. merc850

    Adding fluid to tilt/trim on a '77 Mercury 850

    Re: Adding fluid to tilt/trim on a '77 Mercury 850 In this photo you can see the large fill hole and the vent and the manual says 5W-20 oil.
  6. merc850

    Mercury 50 exhaust stack plugged?

    Re: Mercury 50 exhaust stack plugged? Here are 2 pages from the 1975 manual that should help. I can't tell from the photos but the diagram shows that the exhaust tube bolts onto a stub from the powerhead, I would just look up the tube and see if there is a blockage before tearing it apart...
  7. merc850

    Do carbed motors need a thermastat?

    Re: Do carbed motors need a thermastat? Here's a page from an article about the first 100 h.p. that explains heat transfer in an inline Merc.
  8. merc850

    1978 Merc 800 Shift Cam

    Re: 1978 Merc 800 Shift Cam If you want to do it right you'll need to remove the propshaft and bearing carrier then you can access the shift cam thru the FWD gear. This works best if the propshaft is horizontal: Remove the shiftshaft bushing and the shift shaft and pull it out, reach in and...
  9. merc850

    1977 t-bolt 850 bogs down after half throttle or above

    Re: 1977 t-bolt 850 bogs down after half throttle or above I had the "pump to go " problem and it was a clogged carb screen in this type of carb, I took them out and threw them away. I pay attention to what I put in my gas tank - unlike the POs!
  10. merc850

    tilt motor

    Re: tilt motor Here's the wiring - there's a plug that comes from the switch wiring harness that plugs into the red plug on the pump.
  11. merc850

    No spark on on '74 150hp. I'm new to Merc's...Help!!

    Re: No spark on on '74 150hp. I'm new to Merc's...Help!! Here's a diagram for wiring purposes - the distributor has contacts and a rotor, undo the bolt that clamps it to the housing to check for corrosion water etc. Do not try to remove rotor it is molded onto shaft! The ignition switch could...
  12. merc850

    85hp merc blue band dropping spark

    Re: 85hp merc blue band dropping spark If it has a distributor here's the wiring.
  13. merc850

    74 merc thunderbolt 50 hp tilt trim installation

    Re: 74 merc thunderbolt 50 hp tilt trim installation Here's the wiring diagram and the mounting setup the hoses should have some slack so they can move when trim is operated. The trim limit switch might be toast, you can bypass it and run that way. Make sure the tilt pin is in at the closest...
  14. merc850

    Hydraulic tilt/trim bleeding

    Re: Hydraulic tilt/trim bleeding There must be a good reason they put this in the manual.
  15. merc850

    Merc 650, From black stator to red. What to do with the red wire??????

    Re: Merc 650, From black stator to red. What to do with the red wire?????? Here's the wiring diagram to help clear up your problem
  16. merc850

    Trim Issues on mercury 850 thunderbolt

    Re: Trim Issues on mercury 850 thunderbolt Here's the wiring diagram for the "in boat" pump
  17. merc850

    Mercury Thunderbolt 850 Blueband

    Re: Mercury Thunderbolt 850 Blueband If you have this type of carb take the fuel line off and dispose of the filter.
  18. merc850

    Torque specs for the exhaust

    Re: Torque specs for the exhaust Here's the manual way and the tork specs: cover-250 in/lbs - water jacket 150 in/lbs.
  19. merc850

    1150 distributor

    Re: 1150 distributor If you've never done it, here are the manual instructions
  20. merc850

    Mercury inline 6, Distributor setting

    Re: Mercury inline 6, Distributor setting Here are the torque values
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