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Bob grubb's virtual Outboard Motor museum

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2.5hp @ 3000rpm Model OB410 Ser. # 3564 I 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.