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In the 1980s, many U.S. production engine remanufacturers began reaming valve guides, rather than replacing them, as part of their remanufacturing process. They found that by reaming all the valve guides in a head to one standard size (typically 0.008 in. diametrically oversized), and installing remanufactured engine valves having stems that are also oversized, a typical engine head can be ...
The original price for the 16 hp (12 kW) version was $70 lower (at US$228) than their single-cylinder cast-iron version bearing the same power rating. [ 18 ] Industrial/Commercial (I/C) – This series of engines, initially ranging from 3 to 20.5 hp (15.3 kW), was introduced in 1979 as Briggs & Stratton's answer to high quality commercial-duty ...
The break-in period required has changed over the years with improved piston ring materials and designs. In reference to small engines, the break-in period now (5–10 hours) is short in comparison with that of engines of the past. Aluminum cylinder bore engine piston rings break-in faster than those used on cast iron cylinder bores. [2]
Briggs engineers had worked out how to replace the standard heavy cast iron bathtub. They used their expertise in deep draw metal stamping and the machinery for making car fenders. The new bathtub was stackable and about one-quarter of the weight of the cast iron product. The Briggs family kept Beautyware and did not sell it to Chrysler in 1953.
For example, the Type A cut nails were sheared from an iron bar type guillotine using early machinery. This method was slightly altered until the 1820s when new heads on the nails' ends were pounded via a separate mechanical nail heading machine. In the 1810s, iron bars were flipped over after each stroke while the cutter set was at an angle.
In folding, clamping beams hold the longer side of the sheet. The beam rises and folds the sheet around a bend profile. The bend beam can move the sheet up or down, permitting the fabricating of parts with positive and negative bend angles. The resulting bend angle is influenced by the folding angle of the beam, tool geometry, and material ...
The Briggs & Stratton BlockZilla motor is a more advanced form of the earlier Raptor motor. The block is built up to handle more power. This means that the block is about 6 lb (2.7 kg) heavier and has much more structural integrity. Also the exhaust and intake ports are set on an angle.
The 224-cubic-inch (3.67 L) engine, the larger engine in this family, was introduced in 1917 for the 1918 model year and used only in the Series FA and FB.It had the same bore as the 171, but a longer stroke of 5 + 1 ⁄ 4 in (133 mm), giving it 37 horsepower (28 kW) at 2,000 rpm.