When I had my new Merc 15hp I had the dealer do the first two services, 20hrs & 100hrs. Theory being if it's going to go wrong it'll go wrong sooner rather than later, which turned out to be true as the engine mounts failed very early in its life.
I sold the 15 and bought a used (less than 20hrs) 20hp Merc which I had dealer serviced for the first 20hr svs. I was told as it was outside the 3 month first service period the warranty was invalid. It did me a favour as I now self service my 20hp Merc and over 100 hrs later I haven't had any problems.
To be fair to Merc as I'd had a previous problem with engine mounts, they did change the ones on the 20hp free of charge.
__________________
|