My boat was missing the knob and I went to my local Mastercraft dealer (Midwest Mastercraft) and bought a regulation knob from them. I will replace it with an upgraded knob at some point.
CUSTOM WHEEL & TIRE PACKAGES
$125 LED LIGHT PACKAGE - FREE SHIPPING
REBUILDING HOLLEY MARINE CARBS - $249 DELIVERED
REBUILT COMPLETE MARINE HOLLEY 4160 CARBS
FOR 302, 351 & 454 STARTING AT $425
Email - firstname.lastname@example.org