best value petrol lawnmower image
East Ender
I had some petrol left for my lawnmower from last year. I filled the tank with fresh petrol (about 8 litre), obviously contaminating whole content of my tank. The lawnmower had difficulty in starting. When it started it ran OK but it started kicking back when I started the engine again. I suspect the trouble is with the oxidized petrol I have in the lawnmower and the tank. I do not want to waste this petrol. Can I use it in my car? Are car engines more tolerant than small petrol engines? May be the problem lies somewhere else and not in the "bad petrol". Perhaps someone out there knows?
Answer
What happens with old gas is that it loses its most volatile compounds in there and the rest will not burn well enough. There also is a tendency for "varnish" to form in that gas.
That means that if you use the stale gas in you car you can have starting and gumming-up problems there too. The cost of cleaning your car's fuel system is more than the value of the gas you are recycling.
What happens with old gas is that it loses its most volatile compounds in there and the rest will not burn well enough. There also is a tendency for "varnish" to form in that gas.
That means that if you use the stale gas in you car you can have starting and gumming-up problems there too. The cost of cleaning your car's fuel system is more than the value of the gas you are recycling.
magneto ignition system is made up of 2 electrical circuits what are they?
thomas w
Answer
magnet and coil
A magneto provides pulses of electrical power to the spark plugs in some petrol-powered internal combustion engines where batteries are not available, most commonly those in 2-stroke and 4-stroke engines used in small motorcycles, lawnmowers and chainsaws, as well as in most small aircraft and some racing automobiles, serving a similar function to the coil-type ignition system found in automobiles. In aircraft, typically each cylinder has two spark plugs, each driven from a separate magneto. This arrangement provides redundancy in the event of a failure of one of the magnetos, and two sparks burn more efficiently than one.
Magnetos combine the functions of a dynamo, contact breaker points and coil into one unit. The engine rotates a coil of wire between the poles of a permanent magnet to provide a basic source of electrical energy (In some variants the permanent magnet is rotated and the coil remains stationary). On each revolution, a cam opens the contact breaker one or more times, interrupting the current, causing the voltage in the secondary winding of the coil to reach a very high value, enough to arc across the electrodes of the spark plug. Because no battery or other source of energy is required, the magneto is a rugged, reliable and self-contained solution to providing ignition of the fuel. In some modern magneto designs, an electronic switch replaces the contact breaker.
magnet and coil
A magneto provides pulses of electrical power to the spark plugs in some petrol-powered internal combustion engines where batteries are not available, most commonly those in 2-stroke and 4-stroke engines used in small motorcycles, lawnmowers and chainsaws, as well as in most small aircraft and some racing automobiles, serving a similar function to the coil-type ignition system found in automobiles. In aircraft, typically each cylinder has two spark plugs, each driven from a separate magneto. This arrangement provides redundancy in the event of a failure of one of the magnetos, and two sparks burn more efficiently than one.
Magnetos combine the functions of a dynamo, contact breaker points and coil into one unit. The engine rotates a coil of wire between the poles of a permanent magnet to provide a basic source of electrical energy (In some variants the permanent magnet is rotated and the coil remains stationary). On each revolution, a cam opens the contact breaker one or more times, interrupting the current, causing the voltage in the secondary winding of the coil to reach a very high value, enough to arc across the electrodes of the spark plug. Because no battery or other source of energy is required, the magneto is a rugged, reliable and self-contained solution to providing ignition of the fuel. In some modern magneto designs, an electronic switch replaces the contact breaker.
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