FX G501 Instruction Manual

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Summary of Contents for FX G501

Page 2: Table Of Contents
FX Engine. such as catalogs, leaflets, internet web site, instruction manual, etc. This engine and all of its parts were designed and manufactured by FX in-house Use only genuine and original authentic FX parts for maximum performance.
Page 3: Limitations Of Liability
FX makes no other warranties expressed or implied. FX shall not be liable for any loss, injury or damages, whether direct, indirect, special, incidental, or consequential, arising from the use, misuse, or abuse of this product and/or any product or accessory required to operate this product.
Page 4 Warnings This product is not suitable for children under 16 years of age without the direct Be sure that your operating frequency is clear before turning on or running your supervision of a responsible and knowledgeable adult. model, and never share the same frequency with somebody else at the same time.
Page 5 To prevent any serious personal injury and/or damage to property, be responsible reduction. Always wear ear protection. when operating all remote controlled models. Keep loose objects such as shirt sleeves, neckties, and scarves away from the The model car is not intended for use on public places and roads or areas where spinning tires, flywheel, and gears.
Page 6 Very Important Warnings Handle fuel only outdoors. Never handle nitro fuel indoors, or mix nitro fuel in a Store fuel in a cool, dry, dark, well-ventilated place, away from heating devices, place where ventilation is not appropriate. open flames, direct sunlight, or batteries. Keep nitro fuel away from children. Only use nitro fuel for RC models.
Page 7 FX has no control over usage of this product once it leaves the shop, therefore FX does not pay nor refund shipping on any component sent to FX or its FX can only offer warranty against all manufacturer‘s defects in materials, distributors for warranty.
Page 8 Equipment Required Silicone Fuel Tube Please refer to the exploded view sheet to see what all parts are included with your engine. Typically an FX engine includes: Special silicone fuel tube is required to connect the fuel tank to the engine.
Page 9 Air Filter Oil Fuel High quality air filter oil is required to prevent debris to get It is suggested to use high-quality RC car fuel with 16~30% into the engine. nitro methane. #106240 HUDY Air Filter Oil Fuel Filter Clutch System & Flywheel Collar To install the engine in the car you need first to install the A fuel filter is recommended to prevent debris from getting into the engine.
Page 10 Basic Information Engine temperatures To get maximum performance and life time from your engine you need to work and approach the engine with very specific and detailed care and attention. Every small detail matters and has a significant influence on the performance, reliability During all the operations with your engine you need to regularly check for the and life time.
Page 11 Always use high-quality branded fuel. 0-2 hours The engine will break-in and all parts will properly seat. Always use only the original FX glow plug, muffler, manifold and replacement ball-bearings. After 2 hours of first run the performance should be very 2+ hours good.
Page 12 Basic Information Fuel consumption Top dead center The fuel consumption depends on mix of various factors such as life time of the When the engine is cold, and especially when it is new before proper break-in, the engine, carburetor setting, venturi size used, working temperature, air temperature, piston will feel very tight at the top of the stroke at the top of the cylinder.
Page 13 Engine Parts Glow plug Engine head Main high-speed needle (upper) Main high-speed needle body Carburetor fuel inlet nipple Venturi Venturi O-ring Idle adjustment screw Combustion chamber Carburetor slide Engine head shim Mixture control needle (rear) Carburetor slide boot Sleeve Carburetor body Low-end needle (front) Piston Piston clip...
Page 14 Engine Parts Carburetor 1 Main High-Speed needle (upper) Adjustment There are four adjustable controls on the carburetor. There are 3 needles and 1 The Main High-Speed Needle (Upper) controls the overall fuel flow to the screw. carburetor. When the Main High-Speed Needle is properly adjusted, the engine Main High-Speed Needle (Upper) immediately responds to the throttle operation with clean, hard acceleration without hesitation.
Page 15 3 Mixture Control needle (Rear) 2 Low-End needle (Front) Adjustment Adjustment The Low-End Needle (Front) controls the amount of fuel at idle and low-to- middle RPM. The most difficult setting is the proper low-speed adjustment. The Mixture Control Needle (Rear) is used for changing the mixture strength Follow these principles: at middle speed and acceleration.
Page 16 Please refer to exploded Parts List of your engine where you will find the suggested a combo use the manifold supplied. Typically there are three different lengths of part number of the muffler to use for your particular FX engine. In case this engine a manifold:...
Page 17 Venturi Engine Head Shims The venturi, sometimes called a carburetor reducer or restrictor is an insert in the The thickness of the engine head shim installed influences the volume of the carburetor which controls the amount of air that will go into the carburetor. combustion chamber and compression which influences the quality of fuel combustion, performance and fuel consumption.
Page 18 The FX glow plugs are some of the highest quality glow plugs and are strongly recommended for FX engines. Using any other glow plugs may have negative influence on performance and reliability of your engine.
Page 19 The glow plug filament coil (wire) must be shiny. It cannot be rough or detoriated. Install and use only original FX glow plugs. WARnInG: using a glow plug which has rough (detoriated) coil...
Page 20 Engine Parts Back Plate After installation of the rear cover tighten the screws securely. When the screws Anytime before you open or close the rear cover you need to turn the flywheel are not tightened securely, the pressure inside the engine can push against the assembly (clutch) on the crankshaft so you feel that the piston is in the upper part of the sleeve, which means the piston is in upper position TDC (Top Dead Center).
Page 21 Fuel and performance of the engine. The air filter should be a two-stage foam filter and should always be clean and well lubricated with proper air filter oil. The frequency of cleaning, oiling and changing the air filter depends on track conditions. For break-in and general running, use high-quality market-available model car fuel with a 16-30% nitro methane by volume ratio.
Page 22 Engine Parts Air Filter Oil Engine Mounts The engine mounts and mounting screws are not included with engine and are Proper air filter oil selection is extremely important. It is suggested to use air filter usually part of the RC car kit. Make sure that the engine mount surfaces are level oil from professional RC companies such as the HUDY: and in the same plane.
Page 23 Installation Your new FX engine must be properly run-in using controlled conditions to ensure Exhaust ring all parts become properly fit to each other and achieve the proper operating The exhaust ring is already installed on your engine. tolerances. By the end of the run-in procedure, the engine should be running as close to its actual intended running conditions as possible (with respect to fuel, RPM, temperature, etc.).
Page 24 Installation 4 Press the carburetor down into the intake 2 Push on the retainer screw which will release the internal clamp. 5 Gently tighten the retainer screw until it stops. Please note that tightening the retainer screws the internal clamps are 3 Rotate the carburetor to its correct position.
Page 25 Installation If you have already run-in the engine on a break-in bench or you will break-in the engine in the car, proceed with the installation of your engine as follows: 1 Install the clutch system according to the manufacturer’s instructions. 2 When installing the engine in the model car chassis, ensure that the engine mounts are level and in the same plane.
Page 26 Installation 6 Use your radio transmitter to properly set the throttle servo end-points to suitably control the carburetor. 7 Check that the carburetor opens and closes smoothly without binding. If there is any restriction of movement, adjust the throttle linkage or the position of the carburetor on the engine.
Page 27 Starting the Engine 5 Apply the glow plug starter in preparation to start the engine. 6 Open the carburetor slightly. 1 Fill up the fuel tank. 7 Start the starter box wheel, and press 2 Turn on the radio transmitter and model car receiver. the engine flywheel against it so it rotates.
Page 28 Installation Stopping the Engine 8 After the engine starts, remove the glow plug igniter, and stop pressing the model car onto the rotating starter box wheel. NEVER stop the engine with your hands! Severe injury may result. 9 Once the engine has started, apply a little throttle and allow the engine to warm up to operating temperature.
Page 29: Break-In Procedure
Break-in Procedure Flooding & Hydraulic Lockup A nitro-powered engine requires careful break-in the first time the engine is used to allow the internal parts to achieve proper operating clearances. This is especially true of the piston/cylinder, crankshaft, and conrod. Pay close attention during the Excess fuel in the cylinder may cause the engine to stall (by extinguishing the glow initial break-in period;...
Page 30: Break-In Procedure With Break-In Bench
Break-in Procedure with Break-in Bench Start the engine only using the spinner driver and an electric starting device. Keep clear of the safety guard. NEVER stick your fingers or anything else through the safety guard. Only make engine adjustments when the engine is not running. Stop the engine by covering the muffler outlet with a cloth.
Page 31 Attach the Propeller 5 Thread the spinner onto the 1 Use a crankshaft or piston locking tool to prevent the crankshaft from rotating. crankshaft, and tighten with a This may require the removal of the crankcase rear plate or glowplug, 17mm wrench until tight.
Page 32 Break-in Procedure with Break-in Bench 4 Use a length of silicone fuel tubing to connect the fuel tank to the 2 Attach the throttle control ball-joint to the carburetor. carburetor inlet. Use a length of silicone fuel tubing to connect the muffler pipe pressure fitting to the fuel tank cap pressure fitting.
Page 33 Mounting the Bench All parts securely attached and tightened There will be a lot of vibration when the engine is running. Loose parts may become undone and cause personal injury or damage to the engine. The engine should be tightly attached to the engine mounts, and the engine mounts tightly attached to the bench.
Page 34 Break-in Procedure with Break-in Bench Starting the Engine 4 Apply the glow plug starter to the glowplug, press the spinner driver firmly against the spinner, and turn on the drill (running CCW or “reverse”). 1 Securely mount the spinner driver in an electric drill, and then put the rubber insert in the end of the spinner driver.
Page 35 6 Run last 1 fuel tank of fuel and vary the throttle and check the crispness of the engine response. 7 After completing the run-in at break-in bench your engine is NOT yet ready for high-competition racing but you can already use the engine for standard practice at the track for another 14-15 fuel tanks (approx.
Page 36: Break-In Procedure In The Car
Break-in Procedure in the Car 1.) Warm-up - 2 tanks In situations when it is not possible to break-in the engine with the break-in bench use this alternative break-in procedure. Install the engine in your car following the Installation process on page 25 and follow the instructions below. 1 Start the engine for the run-in procedure as per the instructions in the section “Starting the Engine“...
Page 37 4.) Track Run-in - 14 tanks - Driving at the 3 Keep the car on the starter box and run the engine this way for 4 tanks. Make sure that engine vibration is minimal and the muffler loudness is as low as Track with Richer Setting possible, to prevent premature engine wear.
Page 38: Maintenance
Maintenance Life time of your engine is directly related how you care for the engine after each run. Every time you finish operating the engine, we strongly recommend that you Pliers follow a regular maintenance routine to ensure that the engine receives the proper care it needs for long life and good performance without problems.
Page 39 3.) use after-run oil 4.) Remove exhaust system After use, the exhaust system (muffler and manifold) should be dismantled from Remove the glow plug and add a few drops of high-quality after-run oil into the engine and the exhaust of the engine crankcase covered with the included dust the engine.
Page 40 Maintenance 6.) Maintenance after running in water Use after-run oil to lubricate all the internal parts of the If you run your car in rainy/wet conditions you must also clean the engine from inside. engine. Apply the oil from the rear back plate area and from Clean the outside of the engine –...
Page 41 7.) Air filter service When you store your engine, remove the air filter and use the included dust cap to seal the carburetor intake to ensure that no dirt will get into the carburetor and use the dust cap on the carburetor needle to protect it. Do not operate and run engine without an air filter and always have the air filter clean! The air filter protects the engine from the intake of dust and other 8.) Dust cap protectors...
Page 42: Replacing Parts
Replacing Parts To extend the performance and life time of your engine automatically replace the following parts after the specified time: If an engine component has broken, you must check that all other moving parts are still in good shape. If you only change one part and other parts are not in Change When good shape, it is highly likely that your engine will suffer another failure shortly...
Page 43: Bearing Change
Bearing Change To change the ball-bearings we recommend using special tool and equipment By tightening the clamping nut, the front bearing will be pressed out of the engine designed for RC car engines, such as the ball-bearing puller and presser from HUDY. case and into the cavity of the support bushing.
Page 44 Bearing Change Removing the Rear Bearing Assemble the rear bearing removal tool according to the exploded view. Note that you must tighten the setscrew onto the flat spot of the puller shaft. Be sure to use the correct collet to match the rear bearing in your engine. After you have Continue retracting assembled the tool, insert it into the engine as shown.
Page 45 Installing Front & Rear Bearings When both bearings are fully seated, loosen the tool and then remove it. Use the front bearing tool to install both front and rear bearings. Note the orientation of the support bushing. When installing the bearings you MUST turn around the support bushing so the cavity is facing AWAY from the engine.
Page 46: Troubleshooting
Troubleshooting SYMPTOM Engine spins but will not start. CORRECTIVE ACTIOn Make sure your glow plug starter is fully charged and is properly connected to the glow plug. If the starter is fully charged, replace the glow plug. Verify that fuel is getting to the carburetor. Remove the fuel line from the carburetor and see if there is fuel in it. Check your carburetor settings.
Page 47 SYMPTOM Engine performance is sluggish. CORRECTIVE ACTIOn Engine performance depends on the carburetor settings and how they compensate for the weather & atmospheric conditions. Before suspecting other issues, richen the Main High-Speed Needle by at least 1/12 turn CCW, then retune the engine. Try installing a new glow plug.
Page 48 Troubleshooting SYMPTOM Engine fails to fire. CAuSE CORRECTIVE ACTIOn Fuel tank is empty. Fill the tank with fuel and repeat priming procedure. Fuel not reaching the engine. Check fuel lines. Glow plug element is burn out. Replace glow plug. Glow plug battery discharged. Recharge or replace the battery.
Page 49 SYMPTOM not reaching expected peak RPM. CAuSE CORRECTIVE ACTIOn Insufficient warming up. Set the carburetor needles only after engine has reached normal operating temperature. Insufficient break-in time. Complete the break-in procedure. Replace seal ring. Muffler or manifold is not securely connected or is disconnected. Check the connections and secure them.
Page 50 SYMPTOM unstable idle. CAuSE CORRECTIVE ACTIOn Unsuitable glow plug. Use suggested and only the original FX glow plug. Unsuitable fuel. Do not use extremely high nitro or low oil content fuel. Extremely light flywheel. Add heavier flywheel. Muffler is disconnected or has play.
Page 51 notes...