12V to mains

[JohnBishop]

if you look at the saw is the writing on the blade mostly hidden??

Do you mean if the engraving on the old blade is worn off?

[big-all]

Does the arrow on the blade rotate the same way when you run the saw(possible blade on back to front??)

[JohnBishop]

Does the arrow on the blade rotate the same way when you run the saw(possible blade on back to front??)

so the arrow on the blade correspond with the arrow on the plastic guard.
It cuts from below rather than from the top. Is that right?

[big-all]

the teeth must point forward in direction off rotation

[JohnBishop]

I check ed with the video and it rotates like in the video so luckily the blade wasn't the other way round.