teleflex tach

kingfish 02

Recruit
Joined
Mar 14, 2006
Messages
1
I bought a new teleflex tach, hooked it up and it intermitently works .
any suggestions of what to check. I set the dial at 4cyl for my 1998 mariner 115.
thanks
 

sschefer

Rear Admiral
Joined
Nov 13, 2008
Messages
4,530
Re: teleflex tach

I bought a new teleflex tach, hooked it up and it intermitently works .
any suggestions of what to check. I set the dial at 4cyl for my 1998 mariner 115.
thanks

I had one that would start and run for a few minutes before the tach would start working. Then it would work fine for a while and die and then out of the blue it would start working again. It went away when I changed the stator and rectifier. I should have trouble shot it but I was changing the parts for a different (probably related) problem so I never bothered.

To determine the correct setting for tach you need to count (or know) the number of poles on the stator. For instance, for a 12 pole stator on a four cylinder engine your setting would be 3p. On a 8 pole stator you would use 2p, (i.e. 8/4 = 2 and 12/4 = 3) some also have a 8 and 12 setting that seems to work also. It all depends on the poles on the stator. Have a look at the FAQ's at http://www.mercurymarine.com they explain it quite well.
 
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