this is my buddys first fountain and it did'nt come with any factory paperwork , or manuals on this model 420's w\trs things like wiring, plumbing engine schematics,gas tank size ect..... thanks .

I can fax you a set of schematics for the wiring from my 90 lightning..My friend has a 88 ICBM and I have used them to Diag his boat might work for you..
Glad to help
Bob

Tank Size.. Under the rear seat there ar two access ports open one up and the Id tag for the tank should be rite there with that info on it..