ProBoat ZELOS 48G - Engine Tuning and Carburetor Settings; Engine Tuning; Carburetor Factory Settings; Adjusting the High Speed Needle

Zelos™ 48-Inch Gas Catamaran
Carburetor Factory Settings
Theenginecanbetunedfromthefactorysettingsto
optimizeperformanceundervariousconditions.Ifyou
losetrackoftheenginesettings,returntothesefactory
carburetorsettings.
Adjusting the High Speed Needle
Ifthetopspeedisslow,turninthehigh-speedneedle
1/16turnandtest.Donotexceed1/4turninfromfactory
setting(minimum11/4turnoutfromclosed)orthe
enginewillbedamaged.
Adjusting the Low Speed Needle
Ifthevehicleacceleratesslowly,turninthelow-speed
needle1/16turnandtest.
Donotexceed1/4turninfromthefactorysetting
(minimum1turnoutfromclosed)ortheenginewillbe
damaged.
Idle Adjustment
RPMLower(Arrowtoleft)
RPMHigher(Arrowtoright)
Iftheidleissettoohigh(propellerturns)ortoolow
(enginedoesnotstayrunning),adjusttheidlespeedon
thecarburetor.
Engine Tuning
Beforemakingadjustments:
• Ensuretherearenoleaksorobstructionsinthe
fueltank,fueltubingorthecarburetor.Anyfaults
canaffectengineoperationandtuning.
• Thecarburetorneedleisverysensitive.Adjusting
theneedleeven1/16ofaturnisasignificant
change.Becarefulwhenmakingadjustments.
Runningaleanenginecanleadtopremature
enginewearorcompleteenginefailure.
• Theneedleshavemarkingstodesignatehighand
lowspeed.
Low-SpeedNeedle
(ontherightside).
Closethelow-speed
needlebyturning
itclockwiseuntilit
stops,thenturnit
counterclockwise1
1/4turnsout(open).
IdleScrew(belowtheneedles).
Centerthescrewsotheslotis
straightupanddown.
1/16
1/16
Max 1/4
Max 1/4
RPM
Lower
RPM
Higher
L
H
High-SpeedNeedle(on
theleftside).Closethe
high-speedneedleby
turningitclockwiseuntil
itstops,thenturnit
counterclockwise11/2
turnsout(open).
L
H
L
H
L
H
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