Advance Shock Tester-lack of shock

[integ194]

Hi all
I recently acquired a very original Advance shock 'tester. All aspects worked fine ie coin mech, timer & shock.
But after about two weeks the shock became minimal and is now non existent. I imagined it was a drained battery, replaced it but no resolution. I have checked all wiring and the mechanism and it appears all in order. I note at the top of the shock mechanism an adjustable contact which I have cleaned but made no adjustment without an understanding of its role & correct tolerance.
I would appreciate any tips/help members may be able to provide.
Thks & best rgds Wayne

[integ194]

Well I seem to have resolved the issue by adjusting the contact gap (reducing the gap) at the top of the shock bar & wow with the new battery that 'shock packs some punch'. However if anyone is aware of the correct gap I would really appreciate your advice. Thks & rgds Wayne

[RameGoom]

Just guessing:

Close the gap until it knocks your socks off.

Then, open it just a bit....

[integ194]

Just guessing:

Close the gap until it knocks your socks off.

Then, open it just a bit....

Thks Rameroom