Thread lock Compound

This is the blue "medium" thread locker.

Use blue for screws that you want to be able to remove with hand tools, but will not loosen due to vibration.

If you have a nitro boat, this stuff will save you hundreds of dollars in lost parts...

On the gas engines, this works well on the pull starter screws.

Use a tiny drop on the threads of the screw then assemble.

Full cure in 1 to 3 hours.

1/3 ounce should last several years...