Marlin's Liquid Filled Oil Pressure Gauge with Black 100 lb. Face

High quality oil pressure gauges compliment our quality instruments. Stainless steel gauge with standard 1/8 NPT male fitting and vibration dampening liquid fill. Oil pressure gauges with large easy to read print, We made the numbers larger so you can see them without squinting. Allows monitoring of oil pressure while riding. Reduces costly engine repairs and downtime. Won't interfere with warning light function. Manufactured to fit into Marlin's rocker box mounts for EVO's or Twin Cam engines these units will also fit other existing mounts with openings able to accommodate a 1 9/16" diameter gauge the face is 1 3/8".

IMPORTANT Gauge and face are filled with liquid glycerin to dampen "soften" vibration and reduce needle fluctuations (also extends gauge life). Air bubble in face in NORMAL and needs to be there for gauge to work properly. (liquid may be replaced if loss occurs, use only Marlin approved glycerin - do not overfill, leave a bubble about the size of a penny). Gauge is calibrated 0 to 60 or 0 to 100 by tens in 2-lb. increments.

Use Teflon tape on all threads, careful not to cover hole used for pressure reading.
Use wrench at base of unit to tighten - gently as needed - do not hold by gauge to tighten.
Start motor and check for leaks.
These premium quality gauges fit our rocker box head temperature kits used on Twin Cam and Evolution style motors.
Rubber fill plug is replaceable if needed. Oil pressure gauges fit in our head temp kits also available online.