There has to be some instructions somewhere, but I bought my long time ago and here are my two eurocents:
Five minutes on 2" sections sounds a lot. I have same blade size, but yours is nicer and you have hydraulic downfeed retarder.
1) Choose blade coarsest you can. You need max. amount of space for swarf between teeth. Don't go too coarse though. Least three teeth has to make always contact, othervise arm will drop between teeth and this will strip teeth...My favorite is 6/10 Tpi blade, but I have some finer ones for thinner sections.
2) When cutting pipe/channel/profile. Mount it such way that Least three teeth will make contact with web any given time. Sometimes you need to turn material such way that it is not intuitive. Like thin L-section should be put like inverted V. If you mount it like L you might first strip teeth trying to maul thin web. And second blade wanders all over place when it tries to plow trough long bottom web.
3) Lower blade carefully. You Don't want to nick a tooth everytime you start cutting.
4) Use coolant if you can. I use emulsion, makes nicer cut and blades last way longer (I use mainly iron metals). I use "Sport" drink bottle and adjust between drip/flow.
5) Clean the gearbox. Mine had been filled tablespoon of sand/rust/grime and a little of yak-oil. Scooped grime and washed it. I filled it with boat gear oil and it has been fine ever since. Mine has some bronze or such gear, didn't want to hypoid or such oil that has amonia or whatever it is that attacks bronze but is great on all iron gears.
6) I tend to loose blade tension after every day and retension when I need it, but I'm not really 100% sure if it is necessary, but I do it.
Check electrics just to make sure that everything is under control and then you don't need to worry about it. Mine had bad terminations and cables were not mounted at all. Acidental pull or triping on cable could have caused hazard of electrocution. I felt better after I changed NVR.
The bandsaw I got was definately best bang for money. After going trough compulsory points I have had it in working order around 15 years and it has cut much metal, often as big as I can mount there.
PekkaNF