Calibrating Speedo

[e420x]

I have dual gauges on my 2002 Outback. What is the best way to calibrate the speed's easily? I have those calibration knobs but do not know how to use them properly

[VA LSV]

GPS is the most accurate. When I bought my LSV the dealer told me to drive at 3000 rpm with 2 adults in the boat and set the speedos to 30 mph. I found this to be about 2 mph off compared to GPS. Just turn the knobs untill the speedos read what you want.

[zabooda]

GPS only when there is no current such as a lake versus a river.

[VA LSV]

True. I'm on a lake so no current.

[pjtatro]

VA LSV, where are you located? I am in Mechanicsville, just outside Richmond.

Pete Tatro

[VA LSV]

Located at Claytor Lake right off I-81 in Dublin about 50 mi south of Roanoke.