Yam 10 hr service does not have to be done by a dealer (caveat: in the US, anyway.) Dealer I spoke to said anywhere in the 10 to 25 hr range is fine (this is not Yamaha talking, but a servicing dealer.) In general, 10 hr service involves: changing engine lube oil, changing gearbox oil, changing oil filter(s) and, optionally, fuel filters, and inspection of spark plugs (look for consistency across all the plugs, clean, or a light brown or tan color is best.)
The droplets of water the OP referred to is, I believe, water ingress into the cowling (you're most likely not going see water droplets in lube oils; rather you'll see a milky goop that used to be oil.) Spraying the exposed metals and all fasteners on the powerhead is good preventative maintenance, especially if used in salt water.
If it's a new boat (or was a new boat last September), you should have gotten all manuals with the paperwork package. The binnacle manual should show where the friction adjustment is for the throttle. On mine, I had to really crank it down to keep the throttle from slipping back (top mount single engine control.)
You can get the owners manual on-line here
If you haven't, you should read the literature that came with the boat. There's actually useful info in there (usually.)