DLE - 120 Operator’s Manual Specifications Displacement: Performance: Idle speed: Ignition Style: Recommended Propellers: Spark Plug Type: Diameter x Stroke: Compression Ratio: Carburetor: Weight: Fuel: 120cc 7.32 cu in 12 HP/7,500 RPM 1,300RPM Electronic Ignition 26u10, 26u12, 27u10, 28u10 NGK CM6 (Gap) 0.018in.– 0.020 in. [0.45mm – 0.51mm] 1.85 in(47mm) x 1.38 in(35mm) 10.5: 1 DLE with Manual Choke Main Engine – 5.08lb [2306g] Mufflers – 15.
Parts List (1) DLE-120 Gas Engine with DLE Carburetor (2) CM6 Spark Plugs with Spare Ignition Wire Springs (2) Mufflers w/Gaskets (4) 4x20mm SHCS (muffler mounting) (1) Electronic Ignition Module w/ Additional Tachometer Lead (4) 25mm Engine Mounting Standoffs (6) 5x50mm SHCS with 4mm Lock Washers & Flat Washers (propeller mounting) (1) Silicone Pick-up Wire Cover / Ignition Wire Cover (1) Red Three Pin Connector Lead w/ Pig Tail (for ignition switch) (2) Three Pin Connector Securing Clips (1) DLE Decal (n
back to the engine and serious damages may occur during the break-in period. Break-in should be considered about the first 3-5 gallons you run in the engine. ● For your safety and the safety of others, please do not stand in front of the propeller or inline with the propeller when the engine is running. Keep onlookers away from the running engine, especially small children. ● Always use a balanced spinner and a balanced propeller.
Keeping gasoline inside the carburetor over an extended period of time will damage the diaphragm valve and clog passages inside the carburetor. Because the carburetor is more complicated than those used in glow engines, keep the fuel clean by using a fuel filter. Use a filter intended to be used with gasoline engines. Metal filters intended for glow engine are too coarse and will not screen out finer particles.
Installation Instructions Prepare the engine for installation 1. Check to see that all screws and bolts are tight. Check carefully for any cracks, broken or missing parts. Tighten or replace any damaged or missing parts before proceeding. 2. Install the silicone wire cover over the pick-up lead coming from the engine (cut the excess silicone wire cover) and connect the lead to the pick-up lead from the Electronic Ignition Module. Secure the connection with the included three pin connection securing clips.
On/Off Switch Charge Lead (Not included) OPTIONAL Battery Lead Ignition Battery Lead OPTO Gas Engine Kill Switch (DLEG9205, not included) LED KILL SWITCH Rx Ignition Rx Batt Lead Ignition Control Switch Wire (To On/Off Switch) ELECTRONIC IGNITION SYSTEM Ignition Wires (To Spark Plugs) Pick-Up Sensor Wire OPTIONAL Tachometer Lead/RPM Signal Output Tachometer (DLEG5525, not included) (To Sensor On Engine) 4. Connect the ignition module battery to the on/off switch. Any 4.8-8.
. Secure all connections with heat shrink tubing. (not supplied). 8. Install the remaining silicone wire covers over the ignition wires. 9. Install the spark plugs into the cylinders (7-8lbs torque). Do not overtighten. Installing the DLE-120 on Your Airplane Note: The DLE-120 must be installed on a minimum 3/8" [9.5mm] plywood firewall.The firewall must be securely glued to the airplane. Use triangle stock and pin the firewall with hardwood dowels to reinforce the firewall glue joints.
Fuel Tank 2-LINE SET UP Clunk Line Supply Line to T-Fitting Carb Make connection line between T-Fitting and Carburetor as short as possible. T-Fitting Fuel fill line Drain/Vent Pressure Relief Line Route to top-front of fuel tank interior, to prevent siphoning. Filler Cap or Plug This line must be extended to exit the bottom of the aircraft. 3-LINE SET UP Fuel Tank Drain/Vent Pressure Relief Line Route to top-front of fuel tank interior, to prevent siphoning.
5. Install the choke servo (optional) at least 305mm [12"] away from the engine. Be sure to use a non-metallic linkage. Install a ball link and lock washers to the choke arm (available at your local hobby shop). Next, install the linkage from the servo to the choke arm. 6. Connect the ignition wires from ignition module to the spark plugs. 7. Install the mufflers onto the engine. Be sure to use threadlocker, and that the ignition wires do not contact the mufflers. 8.
half way through the propeller with the finishing drill bit. Then flip the propeller over and drill completely through the hole. 3. Next, set the engine at the beginning of the compression stroke. Note the position of the ignition magnet. 4. Place the propeller on the crankshaft at the one o’clock position. 5. Mark the location of one of the outer holes. Use a GPM Dead Center Hole Locator (GPMR8130) to center and start the hole. 6.
Starting Procedures There are two recommended ways to start the DLE-120: A. Manual Starting Note: When hand starting the DLE-120, use a thick glove or heavy duty starter stick to protect your hand. 1. The propeller should be installed on the drive washer so that it is at the one o’clock position and at the beginning of the compression stroke so that it is comfortable to flip it through compression. 2. Have someone help you hold the airplane while you start the engine. 3.
B. Electric Starter Starting 1. A 24 volt electric starter is recommended to start the DLE-120. Make sure you use a high quality, lightweight aluminum spinner. 2. Have someone help you hold the airplane while you start it. 3. Close the choke on the carburetor and open the throttle slightly from the idle position. 4. Switch on, or power your radio system and make sure you have control of the throttle visually at the carburetor.
Engine Troubleshooting Symptom Engine does not fire Engine starts, then rpm increases till engine cuts out Diagnosis Fix Ignition battery voltage low Charge or replace battery Battery wires faulty or loose Replace wires or Re-connect/check connections Fouled or faulty spark plug, not firing Replace spark plug or check for spark * Engine flooded Remove plug, disconnect fuel line, rotate prop to remove fuel Fuel not reaching engine Check for: a) fuel in tank b) fuel tubing cut, blocked, or kink
Adjustment of the Engine Each DLE has been factory preset. However, higher elevations will influence the performance of the carburetor. To obtain optimum output of the engine, slight adjustment of the carburetor may be necessary. For safety reasons, do not make adjustments to the carburetor during operation. Functions and Adjustments 1. Choke Control (the choke control is used under the circumstance of cold start-up) 2. Throttle Control 3. Idle Adjustment Screw (adjust the idle speed) 4.
Ignition Timing Adjustment The ignition timing is preset on the DLE-120 at 44° before Top Dead Center (TDC).The ignition timing can be advanced or retarded slightly by loosening the (2) ignition sensor phillips head screws and sliding the sensor to the full extent clockwise (45° advancing the ignition) or counter clockwise (43° retarding the ignition). Be sure to retighten the phillips head screws after adjusting the ignition timing.
Optional Digital Tachometer An optional Digital Tachometer (DLEG5525) is available that can be directly connected to the ignition and display the RPMs of the engine. This unit can be permamently installed on the aircraft or used to spot check the Engine RPMs. Do not install or uninstall the DigitalTachometer while the engine is running. Many of the DLE Ignition modules have an additional lead to plug into the optional tachometer.
Engine Maintenance Please clean the non-removable fuel filter in the carburetor periodically. Failure to do so may result in mis-calibration of the needle adjustments. In order to do this it is necessary to remove the phillips head screw which secure the carb filter cover and the carburetor filter gasket. Use only carburetor cleaner to spray around the opening of the filter.
Warranty Information The DLE-120 has a two year limited warranty through Hobby Services beginning at date of purchase. Please retain your receipt as your proof of purchase. Contact Us Hobby Services 3002 N. Apollo Drive Suite #1 Champaign, Il 61822 Tel: 217-398-8970 Fax: 217-398-7721 E-mail: www.enginesupport@Hobbico.
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Stock Number/Key Numbers Mfg Stock No.
DLE-120 Twin Mounting Pattern 3.15 in. 80 mm 2.76 in.
