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25 Yamaha not turning enough RPMs (not the prop)
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<blockquote data-quote="Pappy" data-source="post: 403791" data-attributes="member: 3278"><p>What kind of test? If the engine is running smoothly the pack is doing it's job. If you want to verify that each cylinder is firing at WOT for example you can use a timing light and watch to see how steady the flashes are. Other than that you will need a peak reading voltmeter which is a specialty instrument and a shop manual. </p><p>Am thinking, once you get a tach and verify that you are up there in RPM you are probably going to find that your speed is accurate for the boat and engine. </p><p>There is no way mathematically that you can be running 25mph at 3000RPM.</p></blockquote><p></p>
[QUOTE="Pappy, post: 403791, member: 3278"] What kind of test? If the engine is running smoothly the pack is doing it's job. If you want to verify that each cylinder is firing at WOT for example you can use a timing light and watch to see how steady the flashes are. Other than that you will need a peak reading voltmeter which is a specialty instrument and a shop manual. Am thinking, once you get a tach and verify that you are up there in RPM you are probably going to find that your speed is accurate for the boat and engine. There is no way mathematically that you can be running 25mph at 3000RPM. [/QUOTE]
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25 Yamaha not turning enough RPMs (not the prop)
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