speedo knobs

[motosno963]

anyone know what the knobs are that sit just under the speedos? i have two speedo's and two small round knobs. one under each, and all they do is spin.

[jstenger]

They are used to calibtrate your speedometers. Use a hand held GPS and take your boat for a spin. Use the knobs to match the speedometers to the GPS as you are driving. You will see the speedometer needles move when you rotate the knobs.

[bergermaister]

Supposedly for calibrating when you're running the slalom course. I toyed with setting mine and then super glueing it in place since it always seemed off every time we'd launch. But when PP replaced a speedo I figured I'd just leave it alone.

[motosno963]

all mine do is just sit there and spin..could this be why my speedos dont work?

[motosno963]

bump 10char

[bergermaister]

Fixed.

[motosno963]

lol thats not in the budget right now

[TeamAllen]

If it's an Airguide these guys can convert it to a GPS Speedo for $226 + shipping.
http://www.nauticlaugic.com/airglide.html

[TeamAllen]

You could just replace the gauge entirely I guess?
http://www.boatersland.com/far-32908.html
http://www.boatersland.com/far-32909.html