MasterCraft ProStar 190 - Speedometer; Tachometer; Temperature Gauge; Voltmeter

togetherandinthesamedirection.Doingotherwisecandamagethesystem.
 Thenextmiddleleveristheportenginethrottle,whichallowstheboattofeedfuelintotheengineandoperateinmotion.Pushingforwardon
itwillsignalthesystemthatfuelshouldbesenttotheportengine.Theenginescanberunatdierentlevelsofthrottle.
 Thissystemallowsgreatermaneuverabilityindocking,aswellaswhentheboatisinoperation.However, it requires more practice and
skill in order to avoid potential damage to the boat. See Engine Synchronizing Switch in this section of the Owner’s Manual for more
details.
 Duringregularwarm-upoftheengine,itispossibletotemporarilyincreasetheengineRPMswithoutmovingtheboat.Toaccomplishthis,set
theshiftertoneutralandadjustthethrottleasdesired.TheenginewillrunwithincreasedRPMsandcanbeincreasedordecreasedbymovingthe
lever.ReturnthethrottletoidlebeforeshiftingtoForwardorReverse.
 Thisfunctionshouldbedonesparingly.Over-revvingtheengineforanyextendedperiodcancauseunduewearandtearontheengine.Avoid
advancingtowide-open-throttleandholdingtheRPMsatthatlevel.
Speedometer
(All Models)
   The speedometer indicates
the forward speed of the boat in
miles per hour (unless the boat
is equipped with a speedometer
thatmeasureskilometersperhour,
which is available in the optional
Europeanpackage.)
 To calibrate the speedometer, you need an ac-
curately measured course of 850feet and a certied
stopwatch,whichisaccuratetowithinone-hundredths
(.01) of a second. (This can bedone withGPS, when
equipped.)TocalibratetoA.W.S.A.ocialtournament
rules:
• Approach the course at 36 miles per hour (MPH)
as indicated on thespeedometer. Holdthe speed
steadyandhaveanobservercheckthecoursetime
withastopwatch.
• Ifthecoursetimeisbetween15.88and16.28sec-
onds,noadjustmentsarenecessary.
• Ifthecoursetimeisnotwithinthattolerancerange,
pressupordownonthecalibrationrockerswitchto
adjustthespeedometer’sspeedinterpretation.
Tachometer
(All Models)
Onboatsnotequippedwithamulti-functiongauge,
a separate tachometer gauge is found.The tachom-
eter indicates the
engine speed in
crankshaft revolu-
tions per minute
(RPM).
Temperature
Gauge
(All Models)
  The temperature gauge indicates the
water temperature inside the engine’s
cooling system as measured in degrees
Fahrenheit. The normal operating tem-
perature will range from 140 degrees
Fahrenheit to 190 degrees Fahrenheit.
Engineswithelectronicfuelinjectionalsohaveacontrolcircuitinsidetheenginecon-
trolmodulethatwillcausetheenginetorunatreducedspeedsifthemodulesenses
thattheengineisrunningtoohot.Ifyounoticethatyourspeedhasreducedduring
normaloperation,butyouhavenotmanuallyslowedthethrottle,monitoryourtem-
peraturegauge.If the gauge indicates excessive temperatures during operation, slow
down immediately and turn o the engine.This indicates an engine problem that
needstobecheckedbythedealer!
Continuing to operate the boat while the temperature is above normal operat-
ing parameters may cause serious damage to your engine. Damage to your
engine resulting from operating the engine in an overheated condition can be
costly to repair. Such damage is not covered by your warranty!
Voltmeter
(All Models)
  The voltmeter registers the electrical activity
necessarytooperateyourboat.Ifthebattery(or
batteries,inboatmodelsrequiringtwo[2])islow
ornon-functional,orifvariouselectricalitemson
theboat,suchasstereoequipment,aredraining
the battery(ies) and impacting the boat’s abil-
itytofunctionproperly,thevoltmeterwilllikely
be the rst gauge to indicate that you have an
electricalproblem.Thevoltmetercannottellyou
which battery is draining on boats with two (2)
batteries,butratherfunctionsasageneralalarm
to alert boaters regarding potential issues. On
boatsequippedwithtwo(2)batteries,thealarm
indicatesseveredrainontheenginestartingbattery.Todeterminewhichbatteryisthe
enginestartingbattery,readthemarkingsonthebatterycables.
MasterCraft 2012 Owners Manual • Guide to Individual Models • Page 2-36