Stupid Boost Gauge Question

[skynets]

Maybe this question is stupid, but my friend got this kind of problem, and hope I can get answer from you to answer him.

He just purchased a Blitz Mechanical Boost Gauge (2nd hand)
He hasn't install it yet, but looks like the needle is not pointing at 0?
Questions is:
1. Is it normal, will this get fixed when installed? or is the boost gauge need recalibrate?
2. If need calibration, is it an easy task or just a waste of time?

Anyone encouter this kind of problem before?

This sounds stupid, but hope someone can help!!!

[Dell'Orto]

Nah, it ought to be on 0...Theres a place in auckland who repair gauges, Robertson Instruments or something like that, they ought to be able to calibrate it.

[mr_monkey]

I dont think ive ever had a boost gauge that has had a dead accurate needle. I always assumed that it was to do with differences in atmospheric pressure..... or something

-nathan

[matt dunn]

If it obviously doesn't read zero it it wrong and will not be accurate.
Happens when you drop them and the weight bend the levers inside.

Is it a liquid filled one as the one I had was and they are m not resealable afterwards.