90 hp MARINER Tach Problem

[Redrox]

Hi Guys, great site. I have a 90HP Mariner (I think its a 1990 year model) Recently the TACH (Quicksilver) on my dash stopped working. <br /><br />I took a voltmeter to it and determined that it is NOT my tach or my Throttle control, the problem lies (probably) in the motor itself.<br /><br />Anyone know where I can find some info or offer some advice on how to fix this problem?<br /><br />Many thanks!

 

[Merc90HPnewbie]

Re: 90 hp MARINER Tach Problem

Just so happens I am questoning the accuracy of my dash mounted tach on an 85 Mercury 90HP 6-cyl. I am looking for a 'test' tach that would be easy to hook upand verify the dashboard tach reading. If I find out anything that might help you I will post it here

 

[Merc90HPnewbie]

Re: 90 hp MARINER Tach Problem

Someone over in the general forum answered with this URL<br /><br /> http://www.tinytach.com/origgas.html <br /><br />Tinytach is the make I saw in a Briggs and Stratton manual but they didnt mention the name. <br />These are so simple I was thinking maybe I could just use a handheld DMM with a frequency counter mode and multiply by six. 2 Stroke engines fire once per revolution right?