User Tag List

Thanks Thanks:  0
Likes Likes:  0
Results 1 to 9 of 9
  1. #1
    Join Date
    Jun 2011
    Location
    Tri Cities, Tn
    Posts
    62
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    1976 Mercury 65 hp first start in 12 years

    Hello,
    Ive just aquired a 1976 65 hp Merc. I am looking for any tips/advice on what I need to do before I try to revive this thing. Only thing ive been told is run marvel mystery oil in through the spark plug holes and turn flywheel a few times and sit overnight. Can anybody else tell me what I should do? Also in the same deal I got a 1982 Johnson 70 hp that hasnt ran in 5 yrs. Same thing, any tips/advice that should be done before I try to run these motors? Im fearful of stuck rings or scoring the cylinder walls. Thanks a bunch

    David

    5 of 100

  2. #2
    Join Date
    Nov 2002
    Location
    peterborough
    Posts
    1,295
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    That,s good advice or fogging oil. When things seem to be freed up spray fogging oil into carbs to lubricate crank and rod bearings thanks
    free spirit / ONTARIO, CANADA.

  3. #3
    Join Date
    Nov 2005
    Location
    NE Alabama - Weiss Lake
    Posts
    689
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Is that Merc 65 and Johnson 70 15" shafts? If so there will be alot of takers for those motors for such things as GW Invaders and such.

    Yes just get some oil in there and turn them over by hand or briefly with a battery. Make shure the carbs are clean and put that 50-1 mix in and they will probably fire right up!
    TJ309

    1993 Speedster 13 / 2019 Merc 60 play boat
    2020 Lowe 24' Pontoon boat / 250hp Merc. 51mph!
    72 Hydrodyne bubbledeck undergoing keel up restoration
    2 Jetski's

  4. #4
    Join Date
    Jun 2011
    Location
    Tri Cities, Tn
    Posts
    62
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    thanks for the replies. Question, what about the oil in the cylinders? Will it burn when the engine is started/running? or should I turn the motor over a few times by battery without plugs to try and get the oil out? Also any recommendation on plugs?? the engine doesnt currently have any plugs to reference. Thanks

  5. #5
    Join Date
    Nov 2005
    Location
    NE Alabama - Weiss Lake
    Posts
    689
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Use 2 cycle oil in the cylinders and it will burn out when you fire it up.
    TJ309

    1993 Speedster 13 / 2019 Merc 60 play boat
    2020 Lowe 24' Pontoon boat / 250hp Merc. 51mph!
    72 Hydrodyne bubbledeck undergoing keel up restoration
    2 Jetski's

  6. #6
    Join Date
    Jun 2011
    Location
    Tri Cities, Tn
    Posts
    62
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    what about the marvel mystery oil thats already in it??

  7. #7
    Join Date
    Nov 2005
    Location
    NE Alabama - Weiss Lake
    Posts
    689
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    6
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Dump it. Lay the motor on it's back and let it drain out.
    TJ309

    1993 Speedster 13 / 2019 Merc 60 play boat
    2020 Lowe 24' Pontoon boat / 250hp Merc. 51mph!
    72 Hydrodyne bubbledeck undergoing keel up restoration
    2 Jetski's

  8. #8
    Join Date
    Sep 2001
    Location
    Pekin, IL
    Posts
    9,502
    Thanks (Given)
    468
    Thanks (Received)
    625
    Likes (Given)
    2340
    Likes (Received)
    3968
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    Before you start either, and I emphasize the word before, change out the water pump impeller. Especially if you fear stuck rings and scored cylinder walls.
    Rock
    Team Junk

    No sparkling wiggles in here, only dump truck grinches.

    "Screamin Heathen"

  9. #9
    Join Date
    Aug 2001
    Location
    Annapolis, MD ragboat capital of the world
    Posts
    11,463
    Thanks (Given)
    591
    Thanks (Received)
    162
    Likes (Given)
    2427
    Likes (Received)
    440
    Mentioned
    2 Post(s)
    Tagged
    3 Thread(s)
    Water pump impeller, fuel pump rebuild, replace the carb float needles & seats, inspect the floats. The yellow ones are most susceptible to swelling and cracking; black ones are the best. Bad crankshaft seals top and bottom are common

    Check to see if the motor has a top water outlet on the block. These are prone to steam pocketing at the top, the top water outlet cures it.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •