Nautique 230 - Manual (Page 84)

4-8
Section 4
Speedometer Calibration
The speedometer calibration control knob is located on the under
side of the deck beneath the dash pod above the driver’s right knee.
Drive the boat at a known speed using a GPS or measured course
and adjust the knob until the speedometer is reading correctly.
Turning the knob one direction will raise the needle reading while
turning it in the other direction will lower the reading.
Control Switches
Each electrical circuit on your boat is equipped with a control
switch. The switches have an indicator light for easy ON/OFF
identification. All switches are fuse protected.
Engine Compartment/Bilge Area Blower
The “BLOWER” switch activates the engine compartment
ventilation blower to remove explosive fumes from the area. The
blower is turned on by pressing and releasing the “BLOWER”
switch. Press again to turn off. The blower must be operated for a
minimum of four minutes each time before starting the engines or
generator. In addition, the blower should be operated continuously
when at idle or running at slow speeds.
Explosion and fire hazard from gasoline
vapors can cause death or serious injury from failure to
check for fumes in the engine compartment or operating
the blower. Before engine start-up, check engine
compartment for gasoline vapors, then operate blower
for at least four minutes. Operate blower whenever
below planing speed.
!
The intakes which supply fresh air into
the bilge area are located aft, at the windshield frame
base. The intakes must remain clear to allow air to enter
the bilge area. DO NOT drape towels or any items which
may not allow air to be drawn in while the bilge blowers
are operating.
!
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