Yes pull both plugs and flip the wires outside the hull so they don't ignite something. Hold it wide open while cranking for up to 5 seconds. The compression it has will display itself in the first couple/few revolutions of the engine. Perfect is 150psi per hole so you don't want to be far from that.
I sell 96XP's all the time for $1500 down here. Most are not as good looking as that one but I do all the service and maintenance and include a nice trailer with it (worth at least $300).
The last 2 jugs I bought were red in color. Xps2
I completely drained my system, tank, rotor valve chamber and new lines. 1 gallon filled all the lines, rv chamber and about a third of the oil tank. To top it off is going to take about half a gallon more
Btw, it's 53.00 a gallon here in houston.