They don't come apart. They where made in '80... and I have 3 still going strong...
The head is a husky... are you sure these where made by 3W?

anyhow, I have a bulley that out does the RCS 180 and is lighter... go figure. Boy do they love the Ultra props too...

I have seen this engine fly a 38 lb warbird on a video tape I have of Rally of the Giants... what a cool application (can't remeber which war bird)

I collect these guys, and moving to engine #4 in the next week. Amsoil 100:1 works the best and an upgrade to a C&H ignition is worth it.

cheers
Tim