New to buses, a lot of questions

[DaveG]

Are you asking if you have an air starter vs. electric?

[BG6]

Paul, your wrong on the spec, its 5606 red hydraulic oil, been using it for 30 years.>>>Dan    Can be had from Aircraft Spruce & spec. in gallon cans

Oops, I guess I was a little dyslexic this morning

If you can spell "dyslexic," you ain't it.

[BG6]

In this photo, is that an air starter?

An air starter will look just like a regular starter, except that instead of a fat wire from the battery you will have a fat line from the air tank to the starter, and a solenoid to open that line, and will probably have a small muffler on the outlet.