HPI Racing F3.5 Bedienungsanleitung Seite 4

Optional Tuning
Idle Adjustment Screw
Idle Adjusfrnent Screw
ORPMLow ORPMHigh
The idle should beadjusted after the high-speed needle is set and the engine is at normal operating temperature. Toproperly set the Idle Adjustment Screw, tum on the radio system
and set the throttle trim on the transmitter so that the throttle is In its neutral position. This Will ensure that the slide throttle is fully closed and resting against the idle adjustment screw
Tum the ide adjustment screw counter clockwise to reduce the idle speed or clockwise to increase it The idle speed should be set high enough to keep the engine running smoothly but
notengage theclutch andtumthewheels. T oohighof anidlespeedwillprematurelywearout theclutchshoesanddiskbrake.
Low Speed Needle Adjustment
We recomendthat do not touch the Low Speed Needle. If adjustmentis needed, the low-speed needle needs to be set after the high-speed needle is adjusted and the engine is up
t o norm al ng operati e. r:peratur Set the needle
the needle in 1/8 tum increments; this will improve bottom end throttleresponse. Totest your setting. Dlace the car on the ground and let the engine idle for 30 seconds then accelerateto 3/4
throttle. I f there is a lot of whitesmokeand the car acceleratesslowly, the mixtureis too rich. If the engineacceleratesquickly and then sputters, the mixture is too lean.Whenthe
low-speedneedle is set correctly the engine's throttle response should be smooth and quick. CAUTION: Never tum in more than 2 tums from flush, this will cause the engine to run too
lean and may damage your engine! Ifthe Low Speed Needle is set too lean you will experience the followi
(120 0F) at t he glow p lug). Ifyour engin e
5
Troubleshooting
Description Possible
uel mixture needle settings
Enginedoes mt start
Engine could be worn out
of fuel
Contaminated
B'Gbw
Glow plug is bad
'ENO fue fbw
Engine flooded
Throttle valve may be adjusted
mter may be blocked
Enginestarts, then stalls Idle speed S set too bw
'Air unes inthe
Glow plug is bad
Not erxuh engne is
Airflow through system is bad
Thrcitle servo may be inVrwerO'
Throttle servo glitch
Idle adjustment screw is set too hiØ
Idle is tm high
LOVE' speed needle set too lean
1
About Imm (0.04")
Flush (Factory Setting)
flush (Factory Setting) with t he c arburetor
IS running too l ean, reset the L ow Speed
Problem
fuel
enot
improperly
on tirottle
Improper Idle Speed
Clutch engaged and wheels tuming.
Nol
Low SpeedNeedle
More
e Less Fuel = Lean
body, this s etting isideal for a nd b reaking
: Flame out at part or 3/4 throttle, Overheating
Needle to Its factory settng%lush) and s tad t he t uning
Solution
Set the needes to me factory etting,se
Replace piston and sleeve
Ren mel tmk
Replace fuel
Charge ig
Replace glow plug
Check fuel Ines for cracks, leaks, arri hoEs.R4ace
Remove glow plug and discharge fuel
Allow to cool, rictm the fud nixtwe and
Set idle and adjust neddle valve to the maunfacturers recommended settings
air mer. Cle•dl cr replace if necessary
Adjust me idle speed
Check fcy leaks or crackSiii tie fuel
Replace glow plug
Alb" to cml and then
Check connections between tank, engine and exhaust
Set servo to neutral and reset
Replace the radio batteries
Set ide screw to factory setting, seepage 5
Set bw speed needle to factory setting, see page 5 for proper
tre radoarrtmodd Kit instructmsÜ
4
Setting Proper I dleSpeed Setti*e/s
Engme runs smoothly
If idle is unstable,
Fuel = Rich
speed needle to get a stable idle.
Afterwards,
the idle adjusment
inand s tarting your moton For increased
process agam.
fuel ireif
æümarwÉcturer1s
properidespeed
speed needle adjustrnent
säting neutral on transmitter throtle
without
adjust the low
you need to readjust
screw.
performance turn
(Temperatures above 2500C