![]() ![]() Set for 1/16th inch gap to start new engines. This will only effect throttle response.īarrel Stop Screws - Used for adjusting Idle. Do not adjust this needle until the Master Needle is set for power and top speed. Side Carburetor Needle (Low Speed) - This needle is in the center side of the carburetor and provide throttle response. Make sure you start at bottom of needle seat!! Adjust this needle for maximum RPM and power without being too lean or too hot. Master Needle Valve - main control for fuel mixture. and above will damage engine and shorten life. A normal operating temperature is around 220 to 250 Deg. At this point you must stop, too lean of a setting will heat up engine and damage the piston. Keeping the fuel tank full, continue the process until you slowly turn the Master Needle Valve, 1/8 of turn each time, too a leaner point and in which the engine runs at high RPM and power, but still keep max temp. After about one (1) tank, turn the Master Needle Valve, clock wise, 1/8 of a turn leaner or clockwise. popular Dynamite Platinum Series, Big Red is a force to be reckoned with. Do not heat up the engine too much at this time. 28 monster truck engine was engineered for. In the leaner setting the engine run hot, this is not good yet. In a rich setting, the engine will run cold. You need to buildup a little heat in the engine, but not too hot. Run the car from a slow to fast speed with short bursts of speed. because the design spiral method is essentiilly manual, it can be both slow and difficult to resolve design changes between topics. Let engine run at low RPM for one tank to break-in connecting rod bearing before starting full break-in.īreak-in the engine in the car, by running the engine at a rich setting. DO NOT OVER REV THE ENGINE WHEN FIRST STARTING, this could break the piston and over heat sleeve. Other break-in type fuels or added oil is NOT ![]() We recommend using one gallon of 20% BYRON’S 2000 as break-in fuel. So, you must run the engine rich (COOL) for the first three tanks of fuel. Therefore, the break-in process is very important to provide good service by the OFNA engine. High spots create hot spots that must be broke-in. There is no cause for alarm, because as the engine warms up, the brass sleeve will expand faster than the aluminum piston and the engine will turn freer.Īs with any new engine, there are many high spots and tight fits in the matching process. As you run your engine, this tightness should diminish. The piston and sleeve are matched for fit and the top of the sleeve is tapered for a tight fit. This is normal for a new ABC type engine. Your OFNA engine is extremely tight when the piston is at the top of the stroke and turning the crankshaft by hand. Please note that theForce information in engine box is subject to change with not notice.Ĭarburetor Low end and barrel stop screws are pre-set by factory. We appreciate your choice and know you will enjoy running it. 92653 TEL: (949) 586-2910Thank you for purchasing a OFNA engine. As the demand for quality model upgrade parts increased and expand scope of our business. OEM and own FC brand sales by about 50 each, marketing throughout worldwide. SEND TO: OFNA RACING 22692 GRANITE WAY, STE. Force Models, a professional RC model engine manufacturer/exporter in Taiwan, focusing on developing and producing high quality of RC model nitro engine for over 20 years. ENGINE CASE MUST BE CLEAN WITH NO OUTSIDE GREASE OR DIRT.ENGINE MUST BE ASSEMBLED, NOT IN PIECES.12 #57005 Head shim.15 #57065 Head shim.17ĭO NOT SEND ENGINE FOR REPAIR UNLESS YOU DO THE FOLLOWING. 17 (small hole) #57071 Crankshaft, pro (small hole) I have stopped using the recoil system to start my engine and changed the backing plate as I currently use a starter box. #57001 Head, tall (blue) #57001A Head, flat (black) #57063 Head, tall (gray/black) #57073 Head, tall (silver) 28 nitro engine which is hollow to facilitate the recoil start system keeps breaking right at the union of the pin and the crank web. ![]()
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