From Honda website. 'The introduction of the GX range in 1983 proved a great success in the general purpose engine industry. In fact, Honda has led the market for professional applications for more than 25 years. Over that period, other manufacturers have developed new engines, specifically targeting the GX range. Furthermore, today’s environmental and fuel cost issues, as well as future emission regulations, required the incorporation of new technologies in our engines to ensure that OEM products ‘’Powered by Honda’’ continue to satisfy end-user’s needs while offering distinct and competitive advantages.
This is why, from spring 2010 onwards, Honda will begin to introduce the updated GX engines to its worldwide customers, starting with the GX240/GX270/GX340/GX390-series. These engines meet the most stringent exhaust gas emission regulation, EPA Phase III. The updated GX120, GX160 and GX200 engines are scheduled for introduction in 2011.
New features such as variable ignition timing (digital CDI), increased compression ratio, improved carburettor performance, and a lightweight piston resulted in increased power and torque levels with improved fuel efficiency, and a further reduction in noise and vibration levels. The dimensions and outward appearance, however, remain virtually unchanged, in order to guarantee 100% interchangeability with the current GX-engines. For the same reason the naming of the engines will remain unchanged.'
The current range of engines is already almost unavailable. The new engine while likely an improvement will bring a whole new set of problems. Who will be the first person to 'chip' the Ignition timimg for example.
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