Thank you very much to those who kindly replied to my post.

All of your info are so much appreciated.
Since the engine fault was last week and we are still checking if there is

any engineer who can repair this badly damaged engine with hole.

Our club may buy a second hand one, but taking your advice, we will
consider more options.

Again, I am very pleased to receive many good advice from overseas.
I will update on our club's decision.

Ueda