I have a slightly used Modela .12 that runs great
but the contra fits so loosely that when it is cool
it will practically fall down the bore. Funny thing
is that it seals well and has been like this since new.
After the engine is warm it seems to be snug. It
has always hand started easily and so far presents
no problem. I was thinking,(always dangerous) that
this may at some time cause an interesting failure.
Does anyone have an idea on what should be done?
Ralph