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  1. merc850

    1984 mercury bleed lines

    You can see the labyrinth ridges in this picture of an inline engineand this picture shows the sealing rings of a V6
  2. merc850

    Gear oil for mercury 60hp

    Amsoil gear lube comes in a squeeze pack, it's synthetic and can be used for more than 1 season if no water infiltration. I've used it for years.
  3. merc850

    1973 mercury 850 outboard ignition wires

    Plenty of ignition parts here https://www.oldmercs.com/category_s/1704.htm
  4. merc850

    Quick Question for Merc Experts

    It won't run right until you set it up in water, the back pressure and prop resistance change the way it performs. Muffs are good for winterizing and pre-season starting.
  5. merc850

    Quick Question for Merc Experts

    You set the low speed needles (with the motor warmed up), in forward, running in the water at about 900 rpms. Set them 1 1/4 turrns out to start the process. Revving the h**l out of the motor in N with muffs can lead to destruction.
  6. merc850

    LU 1655-7332 Parts Diagram?

    Here's a diagram showing straight cut gears- inline 6's use a 2:1 gear ratio and the 4's use 2.3:1.
  7. merc850

    '84 Mariner 90 horse lower gear housing removal

    All that work and he never even greased the driveshaft and shifter splines, I like to put anti-corrosion grease on the waterpump bolts.
  8. merc850

    Prop Locking Question (Reverse Locking Cam?)

    Clamp the driveshaft in a vise horizontally then use a box end wrench to undo the pinion bolt, use a rag on the wrench to keep it from damaging the internal threading. More details:
  9. merc850

    Prop Locking Question (Reverse Locking Cam?)

    I had a 1975 LU and the bearing carrier was stuck so bad that removing it ruined the housing, if you soak it with the propshaft vertical in penetrating oil for a while it might free up (I just bought a new LU) Another alternative is buying a complete motor for parts with a good LU.
  10. merc850

    Prop Locking Question (Reverse Locking Cam?)

    The reverse lock cam is installed like this
  11. merc850

    Prop Locking Question (Reverse Locking Cam?)

    I posted this for shift setup: 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 by turning...
  12. merc850

    Stuck float ??

    I'm surprized it runs at all on 32:1 - 50:1 is the ratio. I would use Mercury's PowerTune to clean out the carbon and the plugs.
  13. merc850

    Where do I add tilt and trim fluid on a mercury 1982

    No problem once it's done it usually stays working.
  14. merc850

    Where do I add tilt and trim fluid on a mercury 1982

    OK I will
  15. merc850

    Wiring Help - Merc 500 Thunderbolt 50hp

    If you are doing any work to the distributor don't try to pull off the rotor it's molded on to the shaft just clean the tip with a light sanding.
  16. merc850

    Wiring Help - Merc 500 Thunderbolt 50hp

    This should be the wiring diagram for your motor it seems to be a 1968 model.
  17. merc850

    Wiring Help - Merc 500 Thunderbolt 50hp

    I think you need a proper wiring diagram use the serial Nr. to find it, then, you should clean all the wires and terminals as they are badly corroded. The carbs should be cleaned and float settings done and a compression test as well, a manual is your best investment.
  18. merc850

    20 hp Cowl Interchange?

    You could paint it with Phantom Black paint and re-decal it https://discontinueddecals.com/mercury_decals_20_871
  19. merc850

    Reassembling Mariner/Yamaha 40 2 cylinder two-stroke- use of sealants on gaskets?

    Usually you use Loctite on the seal cases and Permatex on the gaskets, I wouldn't use RTV on any parts.
  20. merc850

    Re-wiring my 78 mercury tower of power

    I have located 3 sources for new harnesses - just google it.
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