best lawn mower engine 2011 image
Robert
Answer
In order to assist in detecting leaks, a minute amount of odorant is added to the otherwise colorless and almost odorless gas used by consumers. The odor has been compared to the smell of rotten eggs, due to the added tert-Butylthiol (t-butyl mercaptan). Sometimes a related compound, thiophane may be used in the mixture. Situations in which an odorant that is added to natural gas can be detected by analytical instrumentation, but cannot be properly detected by an observer with a normal sense of smell, have occurred in the natural gas industry. This is caused by odor masking, when one odorant overpowers the sensation of another. As of 2011, the industry is conducting research on the causes of odor masking..Explosions caused by natural gas leaks occur a few times each year. Individual homes, small businesses and other structures are most frequently affected when an internal leak builds up gas inside the structure. Frequently, the blast will be enough to significantly damage a building but leave it standing. In these cases, the people inside tend to have minor to moderate injuries. Occasionally, the gas can collect in high enough quantities to cause a deadly explosion, disintegrating one or more buildings in the process. The gas usually dissipates readily outdoors, but can sometimes collect in dangerous quantities if flow rates are high enough. However, considering the tens of millions of structures that use the fuel, the individual risk of using natural gas is very low.Natural gas heating systems are a minor source of carbon monoxide deaths in the United States. According to the US Consumer Product Safety Commission (2008), 56 per cent of unintentional deaths from non-fire CO poisoning were associated with engine-driven tools like gas-powered generators and lawn mowers. Natural gas heating systems accounted for 4 per cent of these deaths. Improvements in natural gas furnace designs have greatly reduced CO poisoning concerns. Detectors are also available that warn of carbon monoxide and/or explosive gas (methane, propane, etc.).
In order to assist in detecting leaks, a minute amount of odorant is added to the otherwise colorless and almost odorless gas used by consumers. The odor has been compared to the smell of rotten eggs, due to the added tert-Butylthiol (t-butyl mercaptan). Sometimes a related compound, thiophane may be used in the mixture. Situations in which an odorant that is added to natural gas can be detected by analytical instrumentation, but cannot be properly detected by an observer with a normal sense of smell, have occurred in the natural gas industry. This is caused by odor masking, when one odorant overpowers the sensation of another. As of 2011, the industry is conducting research on the causes of odor masking..Explosions caused by natural gas leaks occur a few times each year. Individual homes, small businesses and other structures are most frequently affected when an internal leak builds up gas inside the structure. Frequently, the blast will be enough to significantly damage a building but leave it standing. In these cases, the people inside tend to have minor to moderate injuries. Occasionally, the gas can collect in high enough quantities to cause a deadly explosion, disintegrating one or more buildings in the process. The gas usually dissipates readily outdoors, but can sometimes collect in dangerous quantities if flow rates are high enough. However, considering the tens of millions of structures that use the fuel, the individual risk of using natural gas is very low.Natural gas heating systems are a minor source of carbon monoxide deaths in the United States. According to the US Consumer Product Safety Commission (2008), 56 per cent of unintentional deaths from non-fire CO poisoning were associated with engine-driven tools like gas-powered generators and lawn mowers. Natural gas heating systems accounted for 4 per cent of these deaths. Improvements in natural gas furnace designs have greatly reduced CO poisoning concerns. Detectors are also available that warn of carbon monoxide and/or explosive gas (methane, propane, etc.).
Self-propelled lawn 22" mowers - Kohler OHV 149cc vs B/S 190cc engines?
Tom
Both are on the same FWD TORO self propelled mower body (model:20371 vs. 20331). I read the 190 has 6.75 hp and the 149cc has 4.2, but both claim 6.75 gross torque. Which is the better engine to go with? thanks much
p.s. I also was told both these engines were made in China .....
Answer
The B&S engine one is a 2011 model or older, the Kohler is a 2012. The B&S engine is the old "L Head" style Quantum engine that Briggs has used for years. Due to EPA emission regulations, those engines are being phased out in favor of "OHV" or "Over Head Valve" engines. The Kohler engine has only been out for a short time. I have yet to see one in action or service it. This is the first year we have had one in our shop. Another reason that the general public will not hear, is B&S owns Snapper and Simplicity. Toro sees them as competitors now. Either engine will last. Even if they are made in China, Kohler and Briggs will stand behind their engine. I would haggle on the Briggs since its a year older. Another way to tell what year it is, look at the first 3 digits of the serial number. If it starts with a 310, its a 2010, 311 is 2011 and 312 is 2012.
The B&S engine one is a 2011 model or older, the Kohler is a 2012. The B&S engine is the old "L Head" style Quantum engine that Briggs has used for years. Due to EPA emission regulations, those engines are being phased out in favor of "OHV" or "Over Head Valve" engines. The Kohler engine has only been out for a short time. I have yet to see one in action or service it. This is the first year we have had one in our shop. Another reason that the general public will not hear, is B&S owns Snapper and Simplicity. Toro sees them as competitors now. Either engine will last. Even if they are made in China, Kohler and Briggs will stand behind their engine. I would haggle on the Briggs since its a year older. Another way to tell what year it is, look at the first 3 digits of the serial number. If it starts with a 310, its a 2010, 311 is 2011 and 312 is 2012.
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