Firstly, Not in a boat, on our motorhome : it has a euro 4 sprinter engine, not even 60k miles in 20 years, but smokes a little bit. Are there any effective fuel additives that actually clean up the exhaust, without destroying the engine, or am I going to have to take the injectors out and visit the local diesel specialist?
Secondly, it has an annoying little gas fault: the hob has three burners, and when using just one, all is fine, but often if a second burner is required, at that point the gas cuts off. There must be a sticking valve somewhere in the system, but where?
Does anyone have any ideas for either question?