Search results

  1. merc850

    Starting a 2 cycle Merc. Verified

    This is a page out of my owner's manual; maybe it could be posted in the sticky section
  2. merc850

    Springtime preparation

    We have all worked on motors that have been neglected so to prevent more damage I have a list of important lube details For the guys in salt water Mercury makes an Anti-Corrosion spray that you can coat the powerhead and DS housing with. Keep your Merc from going bad!
  3. merc850

    Simple Method Of Shift Shaft Setup For Mercury Outboards Verified

    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 propshaft -- prop should spin...
  4. merc850

    Fuel mixing

    Here's a page from the 1975 Manual about fuel/oil (the gray section). This is an important procedure if you just pour the oil into the tank it goes to the bottom, for awhile the motor smokes and runs crappily - when the tank is getting empty the oil has been used up and the gas now contains a...
  5. merc850

    4 hose PT pump

    Hey all, I traded a guy some boat stuff for a 70's PT pump with no hoses - rusted motor that I got running and I was wondering if taking the pump body apart for inspection/cleaning is a good idea, the manual says no. Has anyone successfully dis/re assembled this part?
  6. merc850

    Leakdown testing

    Can a leakdown test be done in the driveway and what are, and where do I get the tools to do it?
  7. merc850

    Attention all power trim owners

    Went to trim up engine last Sunday and all it did was nothing! Pulled the motor apart and found this NO BRUSHES so if your motor stops spinning it is worth the 10 mins. time to check for this problem I am looking for new ones at my Merc dealer today. (I was going to check it in the winter but...
  8. merc850

    Start the season with grease

  9. merc850

    Keep it going!

    Here's a chart for your files, mabe if the PO paid attention to this our motors would be in better shape. . It was all there in the owner's manual but that was thrown away with the spare key.
  10. merc850

    Mercury voltage regulator

    I was told that this is a voltage regulator, can anyone tell me how to hook it up to the old system of just stator/rectifier found on my 1975 Merc 850.
  11. merc850

    Replacement rectifier Merc 850

    I want to replace the factory rectifier with a rec/regulator, which one should I use?
  12. merc850

    This is handy!

    Picked this up Saturday for $75 - it's a bearing carrier retaining nut tool, comes in handy for changing seals, shift cams etc. I have to replace the factory rectifier on my 1975 850 with a rec/regulator, which one should I use(part Nr.?).
  13. merc850

    Don't slag your Mercury Dealer!

    Went to my favorite Merc dealer Wed. and bought: 1 Crank seal 1 Bearing carrier O ring 1 Shift cam 1 Waterpump O ring 2 End cap O rings 1 Distributor gasket 1 Tapered driveshaft bearing-installed while I waited 1 LU bearing carrier locating key Total cost $181.00 All parts were in stock for a...
  14. merc850

    Socket adapter

    Here's a little device that might help loosen rusty bolts, it's a .250"socket adapter that goes in your drill. If you have a hammer drill you can put it in reverse and make it into a low power impact gun and the clutch will adjust the power.
  15. merc850

    1975 850 lower bearing

    Has anyone re and re'd this lower bearing without disassembling the powerhead like the manual says? 1975 Merc 850.
  16. merc850

    Gearcase tool

    Does anyone know a source for a new or used aftermarket Mercury Gearcase Cover Nut Torque adapter: part Nr. C-91-73688?
  17. merc850

    Merc 300

    Does anyone rember seeing one of these - what about working on one? I got this from a 1982 Merc catalog and I guess this was the highest horsepower OB at the time @5800rpm and it weighed 565 lbs.
  18. merc850

    Fuel filters

    I had a fuel problem on my recently purchased Merc 850 (1975), this has back draft carbs but they have a different top than the ones pictured in the manual. I went for a ride and the bottom cylinders lost power so I pumped the fuel bulb and they fired up again, I paddled in and checked the fuel...
  19. merc850

    Merc 850 16v alternator output

    According to my onboard volt meter and handheld VOM my alternator is putting out 16v. I know that 13 to 14v is the factory rating for a 1975 850; does anyone know what causes this and can you identify this part in the attachment (it was screwed onto the distributor front plate.)
View older results
Top