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This troubleshooting guide has been provided to help you diagnose and solve most problems that you may encounter with the engine in
your 1/6 Gas-Powered 2WD Buggy. Most problems encountered can be solved by carefully following the problem-cause-solution
sections. If you cannot solve the problem using this troubleshooting guide, please feel free to contact us at the address, phone number
or email address shown on the second page of these Assembly and Operating Instructions.
ENGINE TROUBLESHOOTING GUIDE
PROBLEM
CAUSE
SOLUTION
1) Spark plug
A) Spark plug electrode wet
A) Remove spark plug and dry electrode
B) Carbon deposits on electrode
B) Remove spark plug and clean electrode
C) Spark plug insulator damaged
C) Replace spark plug
D) Incorrect gap setting
D) Reset gap to 0.7mm - 0.8mm
E) Spark plug electrode damaged
E) Replace spark plug
2) Magneto
A) Ignition coil failure
A) Replace ignition coil
B) Damaged spark plug cable
B) Replace spark plug cable
C) Loose or disconnected spark plug cable
C) Push spark plug cable firmly onto spark plug
3) Switch
A) Switch is off
A) Turn switch on
B) Switch has failed
B) Replace switch
C) Wiring damaged
C) Repair wiring
ENGINE DOES NOT START
ENGINE DOES NOT RUN
PROBLEM
CAUSE
SOLUTION
1) Engine not drawing fuel
A) Clogged breather air hole
A) Clean breather air hole
B) Clogged carburetor
B) Clean carburetor
C) Clogged fuel filter
C) Clean and/or replace fuel filter
2) Poor compression
A) Worn cylinder, piston and/or piston ring
A) Check and replace as needed
B) Leak between cylinder head and crankcase
B) Replace cylinder head gasket
3) Engine will not run
A) Engine is flooded
A) Purge excess fuel from crankcase
B) Carburetor settings too rich
B) Readjust carburetor settings
C) Clogged air cleaner
C) Clean air cleaner filter element
D) Old and/or contaminated fuel
D) Use new fresh fuel
ENGINE RUNS POORLY AND/OR HAS LACK OF POWER
PROBLEM
CAUSE
SOLUTION
1) Engine Overheats
A) Carburetor adjustments too lean
A) Readjust carburetor
B) Incorrect fuel/oil mixture
B) Mix fuel and oil at a ratio of 32:1
C) Spark plug faulty or failed
C) Replace spark plug
D) Cylinder head cooling fins blocked
D) Clean debris from between cooling fins
E) Inadequate airflow over engine
E) Increase airflow over engine
2) Engine has lack of power
A) Air leak in engine and/or fuel system
A) Tighten all engine bolts and fuel system joints
B) Old and/or contaminated fuel
B) Use new fresh fuel
C) Piston begins to seize
C) Replace piston, cylinder and ring
D) Muffler has accumulated carbon deposits
D) Clean muffler
E) Carburetor settings out of adjustment
E) Readjust carburetor
F) Clogged air cleaner
F) Clean air cleaner filter element
G) Engine is overloaded
G) Reduce engine load
