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  2. Briggs & Stratton - Wikipedia

    en.wikipedia.org/wiki/Briggs_&_Stratton

    The Twin Cylinder Engine – This engine was introduced in 1977 as a means of competing with Briggs & Stratton's rivals, particularly Japanese firms like Honda who were cutting into traditional Briggs & Stratton markets by producing lawn mower engines (and later, complete lawn mowers). These first models were rated 16 hp (11.9 kW) and displaced ...

  3. Crankcase ventilation system - Wikipedia

    en.wikipedia.org/wiki/Crankcase_ventilation_system

    Two-stroke engines which use crankcase compression do not require a crankcase ventilation system, since all of the gases within the crankcase are then fed into the combustion chamber. Many small four-stroke engines such as lawn mower engines and electricity generators simply use a draught tube connected to the intake system.

  4. Centrifugal clutch - Wikipedia

    en.wikipedia.org/wiki/Centrifugal_clutch

    When the engine reaches a certain speed, the clutch activates, working somewhat like a continuously variable transmission. As the load increases, the speed drops, disengaging the clutch, letting the speed rise again, and reengaging the clutch. If tuned properly, the clutch will tend to keep the speed at or near the torque peak of the engine.

  5. Briggs & Stratton Raptor - Wikipedia

    en.wikipedia.org/wiki/Briggs_&_Stratton_Raptor

    The second Raptor, released in the 1980s, saw an upgrade to four horsepower standard. This would be the year that Briggs introduced the aluminum-bore dual-bearing block. It had a cast-aluminum connecting rod that decreased internal mass and improved engine life.

  6. Gear train - Wikipedia

    en.wikipedia.org/wiki/Gear_train

    A gear train or gear set is a machine element of a mechanical system formed by mounting two or more gears on a frame such that the teeth of the gears engage.. Gear teeth are designed to ensure the pitch circles of engaging gears roll on each other without slipping, providing a smooth transmission of rotation from one gear to the next. [2]

  7. Ignition magneto - Wikipedia

    en.wikipedia.org/wiki/Ignition_magneto

    An ignition magneto (also called a high-tension magneto) is an older type of ignition system used in spark-ignition engines (such as petrol engines). It uses a magneto and a transformer to make pulses of high voltage for the spark plugs. The older term "high-tension" means "high-voltage". [1]

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