thanks to you all after all the trouble i had with the 4108 with diesel constantly filling up the sump.
this was resolved with the advice i gained from all your response we fitted a new lift pump and also a new injector pump
the differance in engine noise and quality was like climbing onto a new boat no more shouting and the boat seems calmer almost tranquil
so heres a big hearty thanks especially to colin and jill for puting us in touch with a very helpfull site from us to all who read this
thanks for your help and kind offers of free fitting of lift pump etc its nice to no the boating world has like minded people.
nick lyn and claymore