• engine stuck

    From Pork@21:3/105.1 to All on Tuesday, September 14, 2021 16:08:38
    I think this will qualify for DIY. I have an old 1991 Honda CR125 dirtbike that
    I found in a barn. It has been sitting there for at least 20 years. Other than
    being very dusty, the engine is stuck. I have pulled the spark plug and dumped
    Marvel Mystery Oil in it to let it soak. So far it is still stuck tight. Any DIY potions you guys use to unstick a piston from the bore?

    ---
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  • From HSM@21:2/162 to Pork on Tuesday, September 14, 2021 18:55:32
    On 14 Sep 2021, Pork said the following...

    I think this will qualify for DIY. I have an old 1991 Honda CR125
    dirtbike that I found in a barn. It has been sitting there for at least 20 years. Other than being very dusty, the engine is stuck. I have
    pulled the spark plug and dumped Marvel Mystery Oil in it to let it
    soak. So far it is still stuck tight. Any DIY potions you guys use to unstick a piston from the bore?

    MMO is the best potion for the job. On bikes I usually put it in a higher gear and rock it back and forth to try to loosen things up.

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  • From pork@21:3/105.3 to HSM on Wednesday, September 15, 2021 06:26:02
    soak. So far it is still stuck tight. Any DIY potions you guys use to unstick a piston from the bore?

    MMO is the best potion for the job. On bikes I usually put it in a
    higher gear and rock it back and forth to try to loosen things up.

    That's a great idea! Thanks I will give that a try.

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  • From StormTrooper@21:2/108 to pork on Thursday, April 21, 2022 13:00:01
    MMO is the best potion for the job. On bikes I usually put it in a higher gear and rock it back and forth to try to loosen things up.

    That's a great idea! Thanks I will give that a try.

    The only other potion I see getting a regular run is ATF..

    ST

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  • From 2twisty@21:3/166 to StormTrooper on Thursday, April 21, 2022 19:50:05
    The only other potion I see getting a regular run is ATF..

    Seafoam down the spark plug holes and let it sit a while, then start rocking the crank to break the rings loose. Make sure that cam's wel lubed too in case the sieze is there and not in the rings.

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  • From StormTrooper@21:2/108 to 2twisty on Friday, April 22, 2022 08:07:46
    seafoam?

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  • From 2twisty@21:3/166 to StormTrooper on Friday, April 22, 2022 09:58:34
    seafoam?

    https://seafoamworks.com/

    Great stuff.

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  • From poindexter FORTRAN@21:4/122 to StormTrooper on Friday, April 22, 2022 17:44:00
    StormTrooper wrote to 2twisty <=-

    seafoam?

    It's a fuel/oil addative.


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  • From HSM@21:2/162 to 2twisty on Monday, April 25, 2022 12:27:46
    On 21 Apr 2022, 2twisty said the following...

    The only other potion I see getting a regular run is ATF..

    Seafoam down the spark plug holes and let it sit a while, then start rocking the crank to break the rings loose. Make sure that cam's wel lubed too in case the sieze is there and not in the rings.


    I've heard of Marvel Mystery Oil used to unstuck seized engines, but not seafoam.

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  • From k9zw@21:1/224 to HSM on Tuesday, April 26, 2022 14:02:34
    On 25 Apr 2022, HSM said the following...

    On 21 Apr 2022, 2twisty said the following...

    The only other potion I see getting a regular run is ATF..

    Seafoam down the spark plug holes and let it sit a while, then start rocking the crank to break the rings loose. Make sure that cam's wel lubed too in case the sieze is there and not in the rings.


    I've heard of Marvel Mystery Oil used to unstuck seized engines, but not seafoam.

    It is worth considering Mouse Milk or Kroil in this particular use. Mouse Milk I've used more on smaller frozen delicate things, but I've used Kroil on some mightily bound things.

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  • From IrishMonk@21:1/101 to Pork on Tuesday, August 02, 2022 03:58:33
    pulled the spark plug and dumped Marvel Mystery Oil in it to let it

    Just curious, did you ever get this repaired? and if so what worked for you?

    IrishMonk

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  • From pork@21:3/105 to IrishMonk on Wednesday, January 25, 2023 10:47:08
    On 02 Aug 2022, IrishMonk said the following...

    pulled the spark plug and dumped Marvel Mystery Oil in it to let it

    Just curious, did you ever get this repaired? and if so what worked for you?

    IrishMonk

    Not yet. I have several other projects ahead of this one. I try the kickstarter about once a month to see if it is free, So far the kickstarter wont budge. I tried putting it in gear and rocking the bike back and forth. No luck. Looks like i can either try some other concoctions ( someone in another forum suggested CLR) or pull the motor and put it on the bench and start tearing it down. The bike itself is pretty rough overall. I am not sure it is worth a lot of effort or expence to rebuild.

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