During this period the needle valve should be allowed to set on the rich (open) side to insure a rich mixture that will adequately lubricate all mov-ing parts, and it is advisable to inject a few drops of castor oil into the intake tube, while warming up the engine, to assist in lubrication. Do not run the engine faster than 3/4 throttle during the breaking-in period, as excessive heat may cause the piston to freeze in the cylinder or do other damage to closely working parts, resulting in delay and costly repairs. Caution should be exercised and the engine not run -wide open”, for at least a period of two and a half hours. However, it is recommended that the engine be broken in carefully when first installed in the model. Use common horse-sense - operate your engine with good ventilation around you, as it is an internal combustion engine.Īs each O & R Engine has been expertly assembled and tested before shipping, block testing is not necessary, and the engine will receive more adequate cooling in flight. After a little practice, the correct spark and needle valve setting for easy starting will be second nature to you. If the engine becomes flooded, close the needle valve and crank the engine until the excess mixture is forced out.Īfter the engine starts, advance the timer control arm and turn down the needle valve so that the engine runs smoothly. This is particularly true with the type of fuel admission on the rotary valve engine. Care should be exercised not to choke the engine excessively. After several turns, remove finger and crank over to start. With the ignition on and the timer set in the proper position, snap the prop over in a counter-clockwise direction and at the same instant place the left index finger over the intake tube, thereby choking the engine. Place the timer control arm so that the stationary point (the nut on the timer housing) is advanced from the center line of the engine. If so, replace the wire on the plug and the engine is ready to start.įrom the closed position, open the needle valve from four to six complete turns. A spark should jump from the terminal to the crankcase every time the prop is rotated. When the ignition is all hooked up, check the spark by removing the lead from the spark plug, and hold it Va inch from the crankcase. To hook it up, follow the wiring diagram, using only well-insulated (not enameled), stranded copper wire. The ignition system is a most important part of your engine. He danger of using some of the so-called “hot fuels” on the market makes it necessary for the factory to specifically recommend, as a safe and efficient fuel mixture, three parts gasoline to one part SAE 70 lubricating oil, with castor oil being injected into the intake tube during the break-in period. In the side port engine, the intake tube is also an integral part of the crankcase and cannot be removed. Do not attempt to remove the cylinder from the crankcase, as it will damage the engine. Cylinders are secured to the crank-case, using special factory equipment, and can only be removed and replaced at the factory or authorized factory service stations. To secure the best performance and efficiency from your Ohlsson & Rice Engine it is important to study carefully the instructions in this folder and be sure they are thoroughly understood before operating the engine.Īn important feature of Ohlsson & Rice Engines is their one-piece construction.
Ohlsson and rice chainsaw serial#
KEEP A RECORD of your serial number, so that in the event your engine is lost or stolen, we can assist you in proving your ownership. It is of the utmost importance that you fill out your Warranty Card and return it to the factory for registration.
Every part of the finished engine has been inspected and tested, and a Warranty Card is included with each engine. OHLSSON & RICE ENGINES are the product of the world’s largest manufacturers of miniature aircraft engines and are designed expressly for and intended to be used in model aircraft operation only.
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