Re: Johnson 3HP JW-17 Compression woes

[Buccaneer]

Interesting about the compression testers with check valves
at the gauge, like mine. Anyone ever note any actual pressure
reading differences between the two type of gauges?
If so, did they differ by 5 psi, 10 psi, etc?
I have an old Craftsman gauge with a foot long flex hose
that works great, of course the check valve is by the gauge.
I’ll keep using it, but now be aware of the situation.

Prepare to be boarded!