text: I am new to Nitro and purchased the 7.7 it looks to be a really nice engine but arrived with no instructions on installation for breaking. I'm restoring Genesis Limited addition and have not been able to find a good parts supplier and the motor did not offer a replacement exhaust boot.
  It came with a cracked cooling head. Not even a gallon into it and its cracked all around the block. Go buy a different brand engine these arent worth your money