Locked up 1929 Johnson V-45

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    bayham3261

    Canada Member - 1 Year
    Replies: 52
    Topics: 10
    #188302

    I recently acquired a nice (99% complete) but locked up 1929 Johnson V45. If you look closely you can see a wooden gas cap someone made! It has been stored for a long time and who knows how long the engine has been locked up. I’ve been working on stripping the engine down and I have the power head nearly done. I haven’t had any luck with my normal trick for unlocking engines (propane torch, Seafoam penetrating oil with a lot of time and patience.) I’ve heard about soaking badly locked up engines in diesel or a diesel/ATF mix for. I was thinking of giving this a try with the engine block. I’d let is soak for the winter. Has anybody had luck with this? Any recommendations? Thanks!

    A little information is a dangerous thing!

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    lloyd

    US Member - 2 Years
    Replies: 162
    Topics: 0
    #188305

    I have had luck soaking blocks and cylinders in a hot crock pot filled with antifreeze.

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    dave-bernard

    US Member - 2 Years
    Replies: 966
    Topics: 12
    #188307

    Are you sure it is the powerhead and not the lower that is locked up?

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    bayham3261

    Canada Member - 1 Year
    Replies: 52
    Topics: 10
    #188332

    Yes, the block is completely locked… no doubt about it. It is is possible that the lower unit is frozen too but it looks pretty good to me. I’m going to have the block off soon so I’ll see.

    Interesting idea with the antifreeze Llyod. How long do you keep it in the hot crock? do you bring it to boil?

    A little information is a dangerous thing!

    Randy in Tampa
    Randy in Tampa

    US Member - 1 Year
    Replies: 225
    Topics: 22
    #188338

    I have a V70 that was locked up and used ATF/ acetone alternating sides to mostly free it up then an grease fitting and gun to finish the job after a few weeks 😎

    Rotary valve Johnson’s Rule!

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    chris-p

    Canada Member - 1 Year
    Replies: 2482
    Topics: 157
    #188367

    I believe that is the motor I was looking at buying as well. Congrats!

    Alternating between HOT and COLD may free it up. Boil it in a crock pot, or oven, etc….then toss it out in the snow. Back and forth. I soak it in 5/:50 ATF and Acetone as mentioned before hand.

    Im not sure where you are in Ontario, but the snow is coming!

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    garry-in-michigan

    Lifetime Member
    Replies: 3508
    Topics: 31
    #188373

    ATF has a lot of detergents to keep your transmission clean plus a lubricant for the bushings. The highly volatile acetone will get it into the crevices. It works as well as products costing three times as much. Heat and cold uses the different expansion rates of iron and aluminum to break the bond between the two. The high pressure grease works well if you can seal off the ports. This can be difficult in four cylinder (double apposed) outboards, especially Johnsons which use a ported piston. Remove the cylinder nuts and work on the piston with the closed ports to gain access to the connecting rod screws. high pressure grease has been known to break out thin places the cylinder wall. this is less likely in cylinders with removable heads because the casting sand has more support and is less likely to shift.

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    green-thumbs

    US Member - 1 Year
    Replies: 331
    Topics: 35
    #188389

    If you have not yet put your turkey cooker away,now may be the time
    to try your favorite recipe for deep fried V45.!
    Seriously, there are a lot of different approaches for dealing with stuck
    outboards, Often it is the rings are rusted to cylinder wall, sometimes the
    problem lies elsewhere. Lower ends can be stuck, needle bearings can
    be swelled up with rust seizing crankshaft tight. Everyone has their
    favorite cure or cures for what ails a stuck outboard. One size dones
    not fit every condition. I have used the grease gun method on a number of early K Model Mercurys with mixed results. It is a kill or cure approach that gives results good or bad quickly. Several of my
    motors did not survive. As the saying goes…mistakes come from lack
    of experience and experience comes from making mistakes.
    Pressure from grease gun will burst cast iron cylinders with only
    a partial stroke beyond where you should have quit.
    Magic elixirs sometimes work wonders.
    A cautious , patient approach, well thought out ,give a better chance of
    a good outcome than just getting out the big hammer.
    Louis

    • This reply was modified 1 month, 3 weeks ago by Avatargreen-thumbs.
    fifty20ne
    fifty20ne

    US Member - 1 Year
    Replies: 221
    Topics: 361
    #188391

    Please remember antifreeze is poisonous!! Do not use anything for cooking food after touching antifreeze!
    Another idea is Avaporust.
    Soak cylinders for a few days, see what happens?

    fifty20ne
    fifty20ne

    US Member - 1 Year
    Replies: 221
    Topics: 361
    #188392

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    lloyd

    US Member - 2 Years
    Replies: 162
    Topics: 0
    #188428

    Antifreeze doesn’t boil in the crock pot and doesn’t need to stay in long. A few hours or overnight is good. Trick is to cycle from hot to cold repeatedly as Chris-p noted. And tap on the pistons through the spark plug holes with a wood dowel or aluminum rod. I don’t like the grease gun method. Awful mess to clean up even if it works and the pressure can cause damage as noted above. Heat, vibration and lubrication are the best ways to free up stuck parts.

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    bayham3261

    Canada Member - 1 Year
    Replies: 52
    Topics: 10
    #188429

    Thanks! I’m going to give the crock pot method a try once I get it apart. There is snow on the ground today!

    A little information is a dangerous thing!

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    Greg Messina

    US Member - 1 Year
    Replies: 2
    Topics: 0
    #188619

    evaporust solution or old school you can also soak them in molasses and water i think un-sulfured is supposed to work best both will dissolve the rust and should free it up

    according to one article 1 part molasses to 9 parts water for two weeks

    • This reply was modified 1 month, 3 weeks ago by AvatarGreg Messina.
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