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OS Petrol Four Strokes
OS have moved into the Petrol Market and as you would expect are giving you what you need. This growing range of petrol engines has all the quality you would expect from OS. The design is from the ground up rather than adapting old technology for a different use. Deep cooling fins are needed to carry away the extra heat generated by petrol. OS use their casting expertise to make them thin enough to efficiently cool with out adding more weight.
If you haven’t already tried a petrol engine now you can buy with confidence.