ORIGINAL: MinnFlyer
Could be bad bearings
My My.....look who got it right on the nose! Must have been a lucky guess....
After my engine continued to act up as it did I sent it back in. Hobby Services told me the front and rear bearings were rough and rusty! I told them I was using 18% oil. They told me I should have used after run oil at the end of a days flying.
thanks for all the replys