12 pole tach

[sashko1]

"I have Mercury 5000RPM tach.

"I have Mercury 5000RPM tach. On the back there are settings: 103T, 121T, 139T and 155T what do those settings mean? But more importantly - can I use this tack on my 60ESL-70D motor? (3 cyl. 60 HP. 2 cycle. 12 pole)"

 

[dcramer]

I have no idea whether the tac

I have no idea whether the tach can be made to function. Every OMC triple i've seen needs to wot between 4500 and 5500 rpm. This means you'll likely be off the top of scale for a 5000 rpm tach at full throttle.

 

[sashko1]

"Ok. But if assumed I'm no

"Ok. But if assumed I'm not going to rev it up to 5K RPM, how accurate this particular tach will show the actual RPM reading?
What is the setting I need to use 103T/121T/139T/155T for 12-pole alternator motor?"

 

[joereeves]

Alex.... It would be better to

Alex.... It would be better to ask those questions in ther Mercury forum.