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  1. merc850

    1975 Mercury 850 Thunderbolt 85hp

    Re: 1975 Mercury 850 Thunderbolt 85hp Here's a wiring diagram to help you.
  2. merc850

    1975 850 Throttle Linkage Problem

    Re: 1975 850 Throttle Linkage Problem I had the same problem after replacing the trigger with an aftermarket one, the solution was to retard the spark by moving the distributor pulley one notch CCW on the beltbut before you do this check the timing according to this page. This also means...
  3. merc850

    Timing marks 1972 1150...

    Re: Timing marks 1972 1150... Here's the Manual methodthe only thing that is important for initial timing is the relationship between the dist. pulley arrow and the 3 dots on the flywheel.
  4. merc850

    Points 1976 150hp

    Re: Points 1976 150hp Here's the wiring to help clarify what goes where
  5. merc850

    1973 Merc 850 Timing advace

    Re: 1973 Merc 850 Timing advace According to the Manual it's 27* BTDC.
  6. merc850

    1150 tower of power distributor question

    Re: 1150 tower of power distributor question Here's a schematic and instructions for disassembly the rotor is molded onto the shaft - do not pull on it - but I don't think you have to touch the rotor/shaft all you have to do is loosen the fit between Nr. 13 and 15 and 20 - it could be rusted or...
  7. merc850

    1971 Merc 800 stalls when put into gear - UPDATE 7/27

    Re: 1971 Merc 800 stalls when put into gear .... grrrrrrr Re: 1971 Merc 800 stalls when put into gear .... grrrrrrr Here are 2 pages from different manualsthe 800 one is what you're probably using but note the 850 method, it might work for you. If you have this type of carb the filter may be...
  8. merc850

    Why no thermostats in some outboards?

    Re: Why no thermostats in some outboards? I think I've posted this before .
  9. merc850

    Ok..this 850 has me scratching my head now...

    Re: Ok..this 850 has me scratching my head now... It sounds like the bleed restrictors in the transfer port area might be missing, take the covers off and look for three plastic plugs here and these are not available at Walmart or Pep Boys - you'll have to get them from Mercury. You can also...
  10. merc850

    Merc Thunderbolt 50 - what year? And prop?

    Re: Merc Thunderbolt 50 - what year? And prop? Here's a page from the Merc manual that shows the location of the screws, there is also a FLUSH screw but that is not a lube point, - you undo them both to drain and fill the LU. You can buy a pump at a dealer for filling and I would recommend...
  11. merc850

    Need help with an old Mercury inline-6

    Re: Need help with an old Mercury inline-6 The points are in the distributor housing you have to undo the 4 bolts and remove it to set them, also check the belt that drives the dist. for aging cracks etc.
  12. merc850

    1970s Mercury power trim with 3 button panel

    Re: 1970s Mercury power trim with 3 button panel That's correct, you set the trim limit switch while underway to stop motor from tilting too far - the middle button goes from full in to limit setting.Make sure that tilt pin is in lowest hole. here's how you bleed the system.
  13. merc850

    Tachometer hook up on mercury 850 85hp

    Re: Tachometer hook up on mercury 850 85hp One of these should be the rectifier on your motor, you hook a wire to one of the yellow leads and attach it to the SENDER terminal on the tach. Hook the other leads to + - etc.
  14. merc850

    mecury tilt/trim pump ?

    Re: mecury tilt/trim pump ? The brushes failed on mine last year and a dealer had the end cap with brushes attached (old cap here for example) but you have to use silver solder to attach,the cap also has a thermal cutout in it.
  15. merc850

    1961 mercury 45hp magneto. I need some guidance

    Re: 1961 mercury 45hp magneto. I need some guidance The LU is the same only the waterpickup locaton is different Here's some info on setting up the mag.
  16. merc850

    72 Merc 65 hp prop questions

    Re: 72 Merc 65 hp prop questions I would say that a tach should be your first purchase because the motor is designed for a max. operating range (ie. 4800-5200 rpm) and unless you can measure its rpms you can't match boat and motor.If you have a dealer near you he might let you try different...
  17. merc850

    Cant get to the carb! I want to rebuild it.

    Re: Cant get to the carb! I want to rebuild it. If you just want to set/replace the float etc. just take the fuel feed and tops off here's the manual settings also check for this type of carb filter it might be plugged.
  18. merc850

    Help Identifying Merc power Tilt and Trim

    Re: Help Identifying Merc power Tilt and Trim Yes that's one of two trim rams this is what they look like installed, I notice that you have the hoses so you're almost there. Any Merc dealers in your area that have a bone yard - good place to get parts. Here's the wiring diagram if you want to...
  19. merc850

    65Hp outboard spraying gas

    Re: 65Hp outboard spraying gas It sounds like the floats are stuck to the bottom of the bowl or are fuel soaked and sinking, the best way to solve this problem is to take the tops off and check their condition.
  20. merc850

    What to use for stator insulation?

    Re: What to use for stator insulation? I found what I think is the stator but it has some fixable damage, check out the dimensions
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