RC-CAKES

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ALL.. I just bought an old Royal Models Stuka with a ST G90 mounted. The limited history is that the plane has never flown (not quite finished) and the engine ran a few times. Not sure how old the G90 is or what it came off of.

Engine.. Italy made G90. Clean and ok shape. This is my first ST. Right off the bat I see the threads for the exhaust stud is broken off of the case. Didn't come with an exhaust/muffler. Handpropping it - seems tight but with compression. My first impression is it is too tight and maybe a bearing issue?! Now I am not forcing it to turn, but its not as easy to spin as my OS .40/.46s and Saito 72 / 125s . I am very hesiative to start the engine fearing to damage it further...

Since the case is broken already - how hard is it to breakdown and transfer to new case? Will a new case even work with an older engine? Special tools? Any other tests to perform? A new one cost $170 ish. Better to just get a new or different engine?

Thanks for your input.


Update: I used my after-run oil all inside the exhaust and plug hole. After some careful turning it has really loosened up. Still dragging a little on the shaft some. It seems no matter what I will need a new case from the broken threads.

Are the new ones (towerhobbies,,etc) from China? Will they work on this italian made one? Bearings..etc. I added up the parts from tower: front & rear bearings, new case, and exhaust stack is around $90 ish... and no muffler yet. I know the large OEM style will really be in the way and a pitts style is more likely to fit inside the cowl. I will post a few pics shortly.

Thanks again Gurus!

Thoughts!?