Engine Troubleshooting Chart
Contents
1. HOW TO USE YOUR COX WRENCH FOR CARBURETOR FITS CYLINDER EXHAUST SCREWDRIVER HOUSING NUT ON OPENINGS WHEN PISTON BLADE TEE DEE amp MEDALLION IS AT BOTTOM DEAD j ENGINES CENTER Engine S Troubleshooting FITS GLOW HEAD SLOTS FOR REMOVAL FOR FLYWHEEL FITS FLATS ON TOP Chart OR TIGHTENING NUT ON CAR TOP CYLINDER FIN INSTALLATIONS Connect Cox glow head clip wires to a 12 volt battery or Cox battery box A Attach glow head clip to glow head B SMALL FORK TOP VIEW SLIDES IN HERE LARGE FORK LIES ON TOP FIN OF L i l H TROUBLE PROBABLE CAUSE REMEDY C O Check connections of wires to battery and check to be sure clip is firmly and correctly attached to glow head see glow head clip info above Poor battery connection A good battery should test 11 2 volts or connect battery to a glow head that is known to be good If filament does not WILL NOT START glow bright orange replace battery ACTS LIKE BATTERY WASN T ATTACHED TO GLOW HEAD Weak or dead battery Remove glow head Attach glow head to a good 11 2 volt battery If filament does not glow bright orange replace head Burned out glow head Squirt a few drops of fuel through Engine wasn t primed exhaust port and into side of piston then continue starting procedure Loose propeller screw Tighten propeller screw WILL NOT START c T Carefully remove reed retainer and ENNE POPS AND OREN SS Dirt under reed then remove reed Was2. e ENGINE RUNS WELL BUT THEN STOPS Mixture too lean Open needle valve 1 4 turn or more Missing or damaged venturi gasket reed engines with integral tank only AEPRARE VENUSE RUNS ERRATICALLY Bent or broken needle valve Replace needle valve Missing fuel pickup tube inside tank Install fuel pickup tube with spring Not enough Nitro in fuel RUNS WELL BUT NOT LONG ENOUGH ENGINES WITH INTEGRAL TANKS Reposition fuel pickup tube to Pickup tube in wrong position CL position 8 o clock or to FF RC position 6 o clock Cox International www coxinternational ca 1 877 769 1779 Toll free from USA amp Canada INTERNATIONAL 01 778 41 2 91 1 1 International Copyright 2011 Cox International
3. h reed and reed valve engines only retainer in solvent or fresh fuel Replace reed be sure it turns freely Close needle valve completely Leave battery attached and flip ENGINE STIFF propeller without priming until short Engine flooded A ji PROPELLER TURNS HARD Toomi uein ender starting burst occurs Then open KICKS y needle valve 21 2 or suggested amount of turns for your engine and start again TROUBLE PROBABLE CAUSE REMEDY ENGINE STARTS THEN Aao sia lap ae shined until SLOWS DOWN AND STOPS le engine starts and burns out excess fuel Open needle valve and restart Check tank fuel level and refill if Engine not getting enough fuel necessary Or open needle valve SHORT RUNNING BURST Mixture too lean or tank empty a i hale Se ws ponte CHE SAR E RESOR Carburetor body cracked procedure 3 or 4 times opening the Tee Dee amp Medallion engines needle valve 1 2 turn each time Replace carburetor body Loose glow head Tighten glow head with Cox wrench Slowly close needle valve until Mixture too rich maximum RPM is achieved Then open needle valve 1 4 to 1 2 turns With no battery attached flip prop Not enough compression If no definite pop is heard replace cylinder piston assembly ROUGH SOUNDING ENGINE SLUGGISH WEAK POWER One should use 25 nitro fuel although 15 will produce satisfactory results Propeller too large Ensure correct prop size for engin
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