Page 10 - Terrace Boating Essentials Guide

GAUGES

We have found that it is not uncommon for instruments to develop a
certain amount of condensation under the glass. This is often the result of
atmospheric or storage conditions and will usually disappear over a short
time. The condensation will not interfere with the function of the gauge and
replaced gauges will possibly still do the same.
Fuel gauges should only be used as a general indicator of fuel levels.
Irregular shaped tanks and the location of the sending unit in the tank can
introduce considerable error in the fuel gauge reading. We recommend that
you start with an empty tank and note how much fuel is needed to reach
each marking on the gauge. You will then know when it is time to top up.
Remember however that the angle of the tank is going to differ depending
on the load in the boat, whether the boat is on a trailer or whether it is on
the water.
Speedometers generally rely on water pressure to give a speed-reading. If
the intake becomes partially blocked inaccuracies will occur. Jellyfish, weed
and mud will cause total or partial failure of the speedometer. Clean the
tube usually at the leading edge of the gear case with wire or a drill bit (by
hand) slightly smaller in diameter than the tube. If compressed air is available
“reverse flush” the tube at the gauge end. Most speedometers will not work
below 20kph/12mph.

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