Thanks for your replies i did use the attachment manager sorry if the pictures didnt turn out i am using an apple ipad. Many thanks to the count for sorting that out. I agree with bonnar bloke that it must have hit something to cause that sort of damage. Also i know what you mean about the price of a new cylinder at around $425. I will have to see whether i can get the engine to run properly then think whether it is wort the expense of a new cylinder. It seems relatively easy to replace after viewing the excellent video by dj on the steps involved .