When I eventually pick up my two this is what checking
1, oil - not just in range but to the full mark
2, coolant level - again not just close but at the cold mark on the expansion tank
3, does it have the new access panel
4, battery connections - are they tight
5, wiring harness - off the engine
6, handlebar recall - has it been done
7, registration numbers - regular stickons don't work so are they the proper numbers
If your getting a trailer check these item
1, are the wheel nuts/bolts tight
2, tire pressure - is it right
3, do the lights work
4, is the liscense plate bolted on
That the key actually STARTS the Seas Doo, that you get a copy of the warranty paperwork that dealer sends to BRP, the owners manual and safety CD are included (and you read it cover to cover and watch it too) before using the Spark, (there's good stuff in there! So many question posted on here over months have been answered almost word for word by the manual)...Both the Spark and trailer should be "clean and detailed", that's what the dealer IS paid to do!
Be sure you have the proper lift or drop on your hitch receiver...