Mercury Outboard Boat

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Bob grubb's virtual Outboard Motor museum

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1940 Lauson Sport King

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2.5hp @ 3000rpm  Model OB410  Ser. # 3564
These were the first really successful 4 stroke US outboards.  They ,of course, sound like a vintage 4 stroke lawn mower engine.  This motor runs and idles very nicely.  I purchased this engine in 1981 from a NJ collector.  I first ran it in 1983 and occasionally ever since.