tach works intermittently... doesn't work more often than not

[imported_eric]

Hi. Thanks for the help previously. What would could cause a tach to bounce and work intermittently other than the obvious that the tach is faulty? Might this be related to a spark issue which might explain lack of bottom end performance. Also... how far down from the keel should the motor be hanging? The motor is a 115 on 15 ft trihull

 

[ezeke]

Re: tach works intermittently... doesn't work more often than not

Edit

 

[ezeke]

Re: tach works intermittently... doesn't work more often than not

Some of the motors with water cooled regulated rectifiers did have problems with tachometers.

I believe that the recommendation was to connect directly to the yellow/gray wire off the stator, rather than the grey wire at the control.

Check Teleflexmarine.com. Navigate to Guages, Trouble Shooting, then scroll down. See pg 4 of "Other Outboards w/Alternators" in the right hand column.