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Old 05 August 2013, 15:54   #1
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90 HP Mariner ELPTO Rev meter

Hi Guys

I just finished a major rebuild. When i tested 2 days ago the Rev clock is not showing the right RPM. It shows for sure 2000 rpm to much. Any clew ?

Please help.

Cheers From Denmark
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Old 05 August 2013, 16:25   #2
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Try changing the pulse setting on the back of the tacho.
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Old 05 August 2013, 16:26   #3
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Originally Posted by Turbodiesel View Post
Try changing the pulse setting on the back of the tacho.
uhh, how do i do that ?
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Old 05 August 2013, 16:32   #4
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uhh, how do i do that ?
See if you can find a manual for the tach online. There are pins on the back which need to be set to correspond to the engine. You might be able to reset it with it still in the console, but chances are you'll need to un-do the tach's mounting bracket from behind to see the pins. Some have a dial instead of pin switches.
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Old 05 August 2013, 16:33   #5
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See if you can find a manual for the tach online. There are pins on the back which need to be set to correspond to the engine. You might be able to reset it with it still in the console, but chances are you'll need to un-do the tach's mounting bracket from behind to see the pins. Some have a dial instead of pin switches.
uhh nice, thanks, hope you found it for me
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Old 05 August 2013, 18:07   #6
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Can't see what brand tach you have in that console.
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Old 06 August 2013, 01:02   #7
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Can't see what brand tach you have in that console.
Its an old instrument with a M sign in it. (Mercury i believe)
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Old 06 August 2013, 01:55   #8
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the ones ive had have got a round black selector switch on the back - this should be set to 6p - the tacho gets its signal from the charging side of the stator, and is nothing to do with ignition pulses. thats why my 4cylinder force has the same setting as my 3cylinder mariner 75.
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