A little update... senility is catching up with me. Holy, Moly... turns out I was way off on engine and age of machine... not a 1990. This is a year 2000... and I bought this new! Haven't touched in 10 years as I left it at my old property when I turned it into a rental.
Did a full tune up, replaced all fluids, filters, air, fuel, oil, replaced the front plastic bumper which was cracked, and now the hood articulates like new. After a fair amount of electrical diagnostics I convinced myself the starter solenoid was bad and not a dang safety switch. Well one of the safety switches (brake) is bad but that is a simple unplug. New solenoid, and it starts first key click!!! Everything else is in good condition and clean after a crude detailing job.
Now the thing runs and rides beautifully and still has low hours on it for an 18 year old machine. Don't know how many but only had to mow a half acre of decently manicured lawn. I have fallen back in love with it and although I don't really need it with my zero turn, I won't part it out. It's gonna make a good addition to a new home if my heart will part with it. In the meantime I am going to compare performance on steep slopes vs. my zero turn. First I have to wait for some dry grass (3 months?).