DLE-20RA Operator’s Manual Specifications Displacement: Performance: Idle Speed: Ignition Style: Recommended Propellers: Spark Plug Type: Diameter × Stroke: Compression Ratio: Carburetor: Weight: Fuel: ™ © 2014 DLE, distributed by Hobbico. 20 cc [1.22 cu. in.] 2.5 HP / 9,000 rpm 1,700 rpm Electronic Ignition 14 u 10, 15 u 8, 16 u 6, 17 u 6 CM6 (Gap) 0.018in.– 0.020 in. [0.45mm – 0.51mm] 1.26in. [32mm] u .98 in. [ 25mm] 10.5:1 DLE with Manual Choke Main Engine − 1.7lb [660g] Muffler − 2.
Parts List (1) DLE-20RA Gas Engine with DLE Carburetor (1) CM6 Spark Plug with Spare Ignition Wire Spring (1) Muffler w/Gasket (2) 4x20mm SHCS with 4mm Lock Washers (muffler mounting) (1) Electronic Ignition Module w/ Additional Tachometer Lead (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 (not pictured) (2) 17x 60mm White Exhaust Tubes with Clamps (not pictured) Safety Tips and
● For your safety and the safety of others, please do not stand in front or in line 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. An unbalanced spinner and propeller combination will cause high levels of vibration and may cause the propeller shaft to break. Always use a lightweight spinner on your engine.
● Always filter your fuel by using an appropriate filter before putting it into the airplane’s fuel tank. ● Gasoline is extremely flammable. Keep it away from an open flame, excessive heat or sources of sparks. ● Do not smoke near the engine or the fuel tank. ● This engine was designed for use in a model aircraft. Do not attempt to use it for any other purpose. ● Always install an ignition system on/off switch on the aircraft used. ● Do not install your throttle servo inside the engine compartment.
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 connector securing clip.
Switch (Not included) Charge Lead OPTIONAL Battery Lead Ignition Battery Lead OPTO Gas Engine Kill Switch LED (DLEG9205, not included) KILL SWITCH Rx Ignition Rx Batt Lead Ignition Control Switch Wire (To On/Off Switch) Tachometer Lead/ RPM Signal Output Ignition Wire (To Spark Plug) Pick-Up Sensor Wire (To Sensor On Engine) OPTIONAL ELECTRONIC IGNITION SYSTEM Tachometer (Not included) DLEG5525 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 silicone ignition wire cover over the ignition wire to the spark plug. 9. Install the spark plug into the engine cylinder (7– 8 lb torque). Do not over tighten. 10. Install a ball link and nut (available at your local hobby shop) on the throttle and choke arms. Be sure to use threadlocker. Installing the DLE-20RA on Your Airplane Note: The DLE-20RA must be installed on at least a 1/4" [6 mm] quality 5-ply plywood firewall.
exits the engine compartment or the fuselage; most vent lines exit at the bottom of the firewall).You can fill the tank by using the carburetor line as fill line if you have access to it or install a third line to be used as fill line. Installing a third line is the cleanest and easiest way to add fuel. An alternative fueling set up is a 2-line system with a T-fitting approved for gasoline use. Be sure to use a filler plug with either a 2 line or 3 line set-up.
Components for the non-metallic linkage can be purchased at your local hobby shop. 7. Once the throttle servo is installed it’s a good idea to deactivate the throttle return spring with a pair of needle nose pliers. Gently grab the spring and remove it from tension on the throttle lever. Deactivating the spring will remove the load or stress on the throttle servo. Note: If you choose to deactivate the throttle return sprint it’s highly recommended you have a remote kill switch installed (DLEG9205). 8.
14. Please ensure the sensor wire is supported as close to the sensor pick-up as possible. Flight loads may cause stress and damage to the wire where it enters the sensor body. 15. Make sure the cowl is secured to the airplane and that the spinner back plate to cowl clearance is at least 1/8" [3.2 mm]. When starting the engine for the first time and during break-in, it’s recommended that you run the engine without the cowling.
Starting Procedures There are two recommended ways to start the DLE-20RA: A. Manual Starting Note: When hand starting the DLE-20RA, 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 near 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-20RA. 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 If your engine fails to start after the preceding starting procedures please check the following.
Adjustment of the Engine Each DLE Engine 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 adjust the carburetor while the engine is running. Engine Functions and Adjustments 1. Choke Control (the choke control should be used when the engine is cold or the first run of the day.) 2. Throttle 3.
turn the needle to the fully stop/closed position and then open the needle 1.5 –2 turns). It is recommended that the High-speed Needle be adjusted by the use of a tachometer to obtain maximum speed. Do not “over lean” either of the low or high speed needle settings. Remember the propeller will unload (spin faster) in the air and an engine that is a little “rich” on the ground will normally lean out a little in the air. Smooth acceleration and deceleration is an indicator of proper engine performance.
Problem: If Your engine does not reach full rpm. or Carbon build-ups appear consistently on your spark plug. Solution: The high-speed needle valve “H” is too rich. Close it up 1/8 turn and try again. Optional Digital Tachometer (not included) An optional Digital Tachometer (DLEG5525) is available that can be directly connected to the ignition and display the RPM of the engine. This unit can be installed on the aircraft or used to spot check the Engine RPM .
Engine Maintenance Please clean the 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 secures the Carburetor Filter Cover and the Carburetor Filter Gasket. Use only carburetor cleaner to spray the opening around the filter.
Warranty Information The DLE-20RA 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 Ph: 217-398-0007 Fax: 217-398-7721 E-mail: hobbyservices@hobbico.com Web address: www.hobbyservices.
25 mm 56 mm 60 mm 57 mm 93 mm 4.
17 16 13 34 12 15 11 14 10 5 18 24 25 6 9 26 21 20 19 23 30 27 7 22 8 31 5 32 33 4 3 28 1 29 2
Replacement Parts Key Stock Mfg Stock No. No. No.
Notes 22
DLE-20RA Mounting Pattern with DUBG1307 Engine Mount 2.75 in. [ 70 mm] 2.75 in.
