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Old 12-01-2008, 12:11 PM   #13
Scraping Paint
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RE: How much power is enough?

sloboat wrote:

The operative phrase in your discussion is "the harder you run them". An engine running "X" rpm in neutral will have a different life than one running at rated power at the same rpm.
Absolutely true.* But most people equate engine rpms with how hard an engine is working (although I know this is not necesarily the case).* So with this assumption, the working life of an engine can be related to how fast it is being run.* Obviously one can lug an engine something fierce--- in a boat that would be putting too coarse a prop on it and then running the engine at relatively high throttle settings--- and this can shorten the working life of an engine considerably compared to running the same engine at the same rpm, or even a higher rpm,*with the proper propeller loading.

-- Edited by Marin at 13:12, 2008-12-01
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