115 mercury (1988)- tach setting

[rkazmo]

Hi, I have a 1988 mercury, 115 hp.

What is the pulse and pole setting for this motor?

On the back of my tach I have the numbers 1 thru 4, which number would represent the pulse/pole specs?

Thanks in advance!

Rick

 

[Chris1956]

Re: 115 mercury (1988)- tach setting

Normally we use 6p. Do you know if that tach is compatable with Mercs? You can look up the model number and find out.

 

[rkazmo]

Re: 115 mercury (1988)- tach setting

yes it is a mercury tach for outboards!

so with the 4 settings I have 1,2,3 and 4 which one would represent 6?

Do you know what the rpm's should read at idle?

Thanks

 

[Chris1956]

Re: 115 mercury (1988)- tach setting

RPM at idle will be between 800 and 1100. Look on the manufacturers website for the installation instructions or configuration instructions.

 

[rkazmo]

Re: 115 mercury (1988)- tach setting

thanks chris

 

[rkazmo]

Re: 115 mercury (1988)- tach setting

don't mean to be a pain but I am stumped.
I cannot find the merc tach website.

At full out I am running at 5400 rpm's. It dropsto 5000 at about 3/4 throttle. I am thinking it is running to high? The motor sounds like it is purring nicely and is working great.

Currently I have it set at 6P.

Would appreciate any advice?

 

[Barnacle_Bill]

Re: 115 mercury (1988)- tach setting

6P is the correct setting and it sounds like it is working fine.

 

[arsenalpsu]

Re: 115 mercury (1988)- tach setting

Mercs like to spin much better than being luged. WOT for your Merc is 5000-5500. Seems like you have it perfect, most like to prop for 5500-6000 WOT, but don't run WOT very often unless you are 100% sure your fuel system is good, they run 4600 all day real nice.

 

[rkazmo]

Re: 115 mercury (1988)- tach setting

thanks all, appreciate your help!