My own experience of Shaun at French Marine is that he is very helpful, French are a Yanmar main dealer. I have had e-mails via shauns Blackberry after office hours in response to questions. The guys at Levington have always been excellent when I have dealt with them so from my own experience you are in good hands. As an example I asked them to look at a coolant blow I had under warranty, for some reason the engineer decided to do a service. When I queried this with Shaun he could not be more apologetic and organised a credit; result free service. As a result of that I buy all my engine spares from them.