Compression tester question

[shadesh]

I saw a compression tester for sale but don't know if its going to work on my car.

Here is the ad:

"Milton Compression Tester - used twice (made in USA)

High Quality USA made

Composite metric scale reads both psi and all metric ranges.

Fits 14mm and 18mm spark plug holes

16” Double fiber neoprene hydraulic-type hose for long service life

0-300 psi capacity. (0 – 21 kg/cm2)

Used only twice.

Perfect condition."

I have a 1975 280Z with N42.

What size compression tester should I be looking for. ?

[shadesh]

anyone?

[MikeW]

The spark plug size is your only concern and I think that 14mm is standard. 300psi is more than enough.

[MEZZZ]

I just read the box front on mine and it reads about the same and mine worked fine. You should be okay.

[shadesh]

Thanks guys.. I appreciate it.