And I believe in fairy's!!..
.I've had issue with all the new engines I have bought, and I can say that they have all been repaired under warranty....but the first thing they check is that the service schedule is up to date and that it was undertaken by an authorised agent/ service company....which you will find is always a main dealer for the engine, as that is part of the dealers pirks.....
This was also the case for car dealerships until a few years ago...but alas the marine scene has not followed suit.
When you encounter a major problem with an engine I have always found that if you have a quite chat with engineer, 9 times out of 10 they are already aware of the fault at the manufacturer, but unlike the motor industry they do not recall the engine, they just hedge their bets, as most boat owners only do an average of 30 engine hrs per year.
If its a major fault they address the problem on next years model....I know this from first hand experience ...ask PaulD , we nearly run out of fuel coming back from Alderney(luckily we had spare tanks on board) all because of a known fault on the o2 sensor on my Honda 225!!! which costs about