...I got the new manifold and ran the engine at the weekend for the first time.

Holy cow! Is it normal that ASP 61 FS engines are vibrating that much? I rechecked in Youtube and is seems to be normal.

The cylinder head is vibrating to the left and right a quarter inch, alomst. Ok, the engine mount I use is rather soft but helps to protect the plane. After 30min break in I noticed some reduction but still...

Otherwise, the engine started easily by hand and I had no problems to adjust the needles (running on Coolpower 5%, O.S. F and 12x6 APC). The engine has lots of power too. And the sound! I realy like the sound of the engine. My little O.S. 30 FS does not come close to the ASP 61 FS.

But how could I get rid of the vibration? Should I use a glas filled engine mount? Now, the engine is screwed on wooden bearers.