Newb Questions About 1984 Wellcraft Sportsman 228

[A ReelCool Chick]

Hi everyone!

New member (though I've been lurking & learning for a bit here and on Hull Truth) and new to boating. I just bought my first boat, a semi-project '84 Wellcraft Sportsman 228 (I say semi-project because she runs, but I need to do some work). She sports a rebuilt Evinrude 225 on a bracket and Lenco trim tabs.

I'm looking to learn all I can about her, and have some questions (one is kinda crazy) to ask:

1. I can't find any catalog information on the 1984, but a decent amount on the 1985. Are they essentially the same boat? What improvements/modifications are there from one model year to the next?

2. (Insert crazy question here) Looking at the pic below of the dash panel, I'm trying to identify the switches. I know and have tested the spotlight and controls, I'm not sure the electric primer works and one switch is for the side lights...but how do I determine which switch is for the bilge (especially if the bilge is inoperable)?