It may be built in the U.S. Now. According to briggs & Stratton website the vanguard is still manufactured by Diahatsu. The new 48" s150xt mowers have wider tires than mine (23 x 12; mine has 23x 10 tires), twin 5 gallon fuel tanks, and and the fx730 Kawi engine as an option. Mine has the fx600 Kawi, and only one 5 gallon fuel tank. Another feature I like on the new s150xt mowers is the way the floor panel can be removed. Loosen the knob on top and remove the panel. You have to use a wrench and take 4 bolts loose to get mine off. I wish I had waited and got one with the larger engine, but I really can't complain. Mine has enough power to mow at 10 mph, and uses about 3 gallons of fuel to mow my 4.2 acres. I gave about $5300 for mine in 2012 and its a great mower. I really like the icd deck as well.
Pulled this off the website:
Commercial Engines
Briggs & Stratton Commercial Power designs and manufactures robust, high performance engines. Premium-grade Vanguard engines are application-engineered to power equipment that works for a living. Our team promises to work as hard as our Briggs & Stratton engines to earn the respect of everyone with whom we do business. We deliver the best total solution.
Through an alliance with recognized commercial engine manufacturer Daihatsu, a member of the Toyota Group, and internal production facilities, we are able to offer the most complete range of commercial engines. From 5.5 to 36 gross horsepower, Vanguard engines provide the broadest range of commercial air-cooled power solutions for your equipment.
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