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2018 25 Mercury EFI Tach Readings/Settings
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<blockquote data-quote="muddywaders" data-source="post: 452960" data-attributes="member: 13234"><p>An inductive tach should have two settings: one spark per revolution(2-stroke) or one spark per two revolutions(4-stroke).If your tach is set for the former you would be at 7800 rpm.Something is amiss.I have purchased a tiny tach and although it was useful for propping(WOT rpm) I found it erratic below 1000 rpm it also stopped working very shortly.I now use an automotive style voltmeter for tuning purposes.I believe I may have bought a faulty unit because other people have had good service from their "tiny tach".Hopefully someone can recommend a particular brand/model.cheers m.w.</p></blockquote><p></p>
[QUOTE="muddywaders, post: 452960, member: 13234"] An inductive tach should have two settings: one spark per revolution(2-stroke) or one spark per two revolutions(4-stroke).If your tach is set for the former you would be at 7800 rpm.Something is amiss.I have purchased a tiny tach and although it was useful for propping(WOT rpm) I found it erratic below 1000 rpm it also stopped working very shortly.I now use an automotive style voltmeter for tuning purposes.I believe I may have bought a faulty unit because other people have had good service from their "tiny tach".Hopefully someone can recommend a particular brand/model.cheers m.w. [/QUOTE]
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2018 25 Mercury EFI Tach Readings/Settings
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