The iboats forum moderators are excited to announce that at this time it appears the iboats forums posting pictures function is working once again. Though we cannot promise for how long, we're hoping for indefinitely.
A wire from the '-' side of the coil runs up to the back of the tacho. The tacho measure the pulse rate and uses that and the setting of the switch on the back of the tacho.... Then converts that to a voltage which moves the needle.
