Where to get an adjustable Hobbs switch ?

[c&cgn]

I need an adjustable Hobbs switch for my RA double pumper setup. It currently comes on too low and bogs the motor.

Anyone know where to get one ? Preferrably in Canada

 

[GNSCOTT]

NAPA has them in the Balkamp line, adjustable.

I believe they have a 15psi. available.

 

[Boston GN]

NOS (Nitrous Oxide Systems) piece from Summit. NOS part # 15680