Just read all this and it's really great to have such a detailed and long discussion on RIBnet, like the old days!
But............I can't help thinking that you should all just forget the flipping warranty!
Genuinely, how likely is it that a major mechanical catastrophe is going to befall one of these relatively simple engines?! Far more likely some little electrical widget will give up the ghost and Suzuki will say: "Ahh, sorry Sir, not covered, read the small print and goodbye".
Stick the £600 saved in servicing over five years somewhere more productive and enjoy the things!
And honestly, who ever bought a small outboard with a main dealer full service history! Won't make a happath of difference come resale, people will bite your hand off regardless. Just keep it cosmetically clean, exterior waxed, self serviced, well greased and clean under the hood.
From reading all the contributions I'm sure you lot like me would far more trust yourselves to service it properly than some unknown kid at the local (lack of)service centre.