9
Need help or have any questions? Call us at 1-714-963-0329 or send us an Email at service@globalhobby.net
❑ Carefully pull the air filter assembly off of the carburetor.
❑ Pull back on the throttle trigger. The carburetor barrel should
open completely and both brakes should be disengaged.
❑ Let go of the trigger and the carburetor barrel should return to its
idle position - open about 1/16". The brakes should still be disengaged.
✦✦
✦✦
✦IMPORTANT
✦✦
✦✦
✦ If the carburetor barrel does not open when you
pull back on the trigger, flip the throttle servo reversing switch on
the top of the transmitter to change the direction.
If the carburetor barrel does not open completely, move the throttle
trim lever on the transmitter until the barrel is opened completely
when you pull back completely on the trigger.
❑ Push the throttle trigger forward. The carburetor barrel should
stay in the idle position (open about 1/16") and the brake linkage
should move forward and engage both of the brakes.
❑ Let go of the trigger and both brakes should disengage.
✦✦
✦✦
✦IMPORTANT
✦✦
✦✦
✦ If necessary, you can adjust the brake linkage by
sliding the wheel collars (on the brake linkage wire) forward or back.
See page # 15 "Adjusting the Brake Linkage" for more details.
❑ Turn off the transmitter and receiver for now and push the air
filter back onto the carburetor.
✦✦
✦✦
✦WARNING
✦✦
✦✦
✦ Never run your Mammoth RTR Nitro Monster Truck
without the air filter installed on the carburetor.
Idle Stop Screw:
The idle stop screw is preset from the factory and should not require
adjustment. The idle stop screw adjusts the closure of the throttle
barrel. We recommend that the idle stop screw be adjusted so that
the carburetor barrel stays open about 1/16". Turning the screw
clockwise will cause the barrel to stay open more. Turning the screw
counterclockwise will allow the barrel to close more.
High Speed Needle Valve:
The high speed needle valve is preset from the factory for the initial starting procedure. Do not make adjustments to it at this time. The
high speed needle valve is used to meter the air/fuel mixture at full throttle. Turn the needle valve clockwise to lean the mixture or turn
the needle valve counterclockwise to richen the mixture. When you start the engine for the very first time, the needle valve should be
turned in completely, then backed out 3 turns. When you start the engine after that, leave the needle valve in the same position it was
in when you shut down the engine.
SECTION 5: BECOMING FAMILIAR WITH THE XTM RACING 24.7 NITRO ENGINE
Please refer to the photo below to familiarize yourself with your engine's carburetor. You should have a small flat blade screwdriver
handy to make adjustments to the carburetor.
Your Mammoth RTR Nitro Monster Truck comes equipped with the user-friendly and powerful XTM Racing 24.7 nitro engine. Before
starting the engine for the first time, please read these next two sections very carefully.
To Next Page
Loading...
