Broken Thumb Screw Removal

[Aidan Smith]

Hello! Working on a 1960 Evinrude Yachtwin/Lightwin, and I was attempting to un-seize the clamp screws, but ultimately failed.

Would anyone have any recommendations of how to remove it?

The rest of the motor is in great shape, other than it is missing the float bowl, if anyone has one.

 

Thanks!

"Shells sink, dreams float. Life's good on our boat."
1921 Elto Light Twin
1923 Evinrude Model N Sportwin
1930 Johnson F-50
1956 Johnson JW-12R
1956 Johnson CD-13A

[seakaye12]

Is there enough at the back to get a hefty vice-grip pliers on it?

The trick to getting those out is HEAT.  Lots of heat .  The HEAT and QUENCH techniques.  Don’t even try without heat;  if you do get the screw to move it might damage the threads.

In your situation…..if the heat and vice-grips is not the answer….then you have to drill it out.  I might be looking for another clamp if it’s a common motor.

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Aidan Smith

[Aidan Smith]

Thanks,

I believe there is enough at the back I can get some vice grips on it, and try with heat.

I’d like to keep this whole motor intact and original, as it is a low serial number and has been in our family for a long time.

It is an early Yachtwin, the 3 hp but with a 90 degree lower instead.

Any solvent ideas for breaking it loose?

 

"Shells sink, dreams float. Life's good on our boat."
1921 Elto Light Twin
1923 Evinrude Model N Sportwin
1930 Johnson F-50
1956 Johnson JW-12R
1956 Johnson CD-13A

[Author]

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