HPI Racing K 4.6 Big Block engine Bedienungsanleitung Seite 4

Optional Tuning
Idle Adjustment Screw
O IdleAdjustment Screw
RPM
The idle speed is set after the high-speed
trim on the transmitter so that the throttle is in its neutral position. This will ensure that the throttle slide is fully closed and resting against the idle adjustment screw. Turn the idle 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 not engage the clutch and turn the wheels. TOO high of an
idle speed will prematurely wear out the clutch shoes and brake disk.
Low Speed Needle Adjustment
Low Speed Needle
We recomend that you do not touch the Low Speed Needle. If adjustment is needed, the low-speed mixture is set after the high-speed
the needle flush (Factory Setting) with the carburetor body, this setting is ideal for and breaking in and starting your motor For increased performance turn the needle in 1/8 turn increments; this will improve
bottom end throttle response. To test your setting, place the car on the ground and let the engine idle for 30 seconds then accelerate to 3/4 throttle. If there is a lot of white smoke and the car accelerates
slowly, the mixture is too rich. Ifthe engine accelerates
and quick. CAUTION: Never turn in more than 2 turns from flush this will cause the engine to run too lean and may damage your engine! If the Low Speed Needle is set too lean you will experience
the following: Flame out at part or 3/4 throttle,
start the tuning process again.
E-zz—
5
Troubleshooting
Description Possible Problem
Engine does not start uel mixture needle sett ngs are outo range
Engine could be worn out
ut of fuel
Contaminated
(Glow plug igniter is hOtGharg
Glow plug is bad
fuel flow
Engine flooded
Engine has overheate
Throttle valve isn't adjusted properly
Air cleaner is blocked
Engine starts, then stalls Idle speed is set too low
•r bubbles in the
Glow plug is bad
Engine is overheat
Airflow through system is bad
'Throttle servo is improperly set
Throttle servo glitch
len trop haut ea justment
Low speed needle set too lean
Jmproperlysetneu
hpi•racing
About Imm (0.04")
needle is adjusted and the engine is up to operating temperature. To properly set the Idle Adjustment Screw, turn on your radio system and set the throttle
quickly and then sputters,
Overheating (Temperatures above 280 F at the glow plug). If your engine is running too lean, reset the Low Speed Needle to its factory setting (Flush) and
fuel
screw IS set too lg
tralon&ansmitterthfOttléfriOg
7-35e—
'boo: -n —
Improper Idle Speed Setting
Clutch engaged and wheels turning.
Nol
Flush with carburator body.
the mixture is too lean. When the low-speed needle is set correctly the engine's throttle response should be smooth
Solution
et the nee es to t e actoryse ng, see page
Replace piston and sleeve
Refill fuel tan
Replace fuel
Charge glow ign
Replace glow plug
Check fuel lines for crac , ea s, an
Remove glow plug and discharge fuel
Allow engine to cool, richen the fuel mixture and then resta
Set idle and adjust neddle valve to the maunfacturers recommended settings
Check air filter. Clean or replace if necessary
Adjust the idle speed
Check for leaks or
Replace glow plug
Allow engine to cool andthen resta
Check connections between tank, engine and exhaust
Set servo to neutral and reset linkages according to radio andmodelmanufacturer s specificatio
Replace the radio batteries
et I e screw to actory settlng, see page
Set low speed needle to factory setting, see page 4 for proper low speed needle adjustment
dio and car kit instructionsforsettingneutralomtransmitter
A—YD 1
IPOD—3—
4/16
Proper Idle Speed Setting
Engine runs smoothly without wheels turning.
Okl
Rich Lean
More Fuel Less
needle is adjusted and the engine is up to operating temperature. Set
sec
ep ace e ne necessa
r proper I e spee a justment
throttle tri
Fuel