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Old 03-31-2007
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I don't think low hours is a bad thing, it's a good thing. But it just means that some maintenance items, (filters, plugs, injectors, gaskets, belts etc) that would normally be replaced from use, probably have not been. Meaning, you may want to have a mechanic give it a "tune up" and replace any parts that may have deteriorated and/or failed from lack of use. Personally I wouldn't be to concerned with the internal moving parts, (rings, bearings etc), as low hours on any moving part is certainly preferred over high. Unless it's being just sitting for years, then there might be rust inside, but if it was started regularly, it should be fine.. The Yanmar 2QM20 is 20hp, I'm pretty sure the 18hp came out a few years later (mid 1980's)
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