Tach Issue

[bbwhitejr]

My tach has started acting crazy. The main tach (with the needle) will not work at all or show 2000rpms when I know I am around 3800 according to the Smart gauge. The smart gauge works perfect and 75% of the time the main tach does as well.

Any ideas?

 

[mwph]

Not sure if this pertains to your model but I have read this many times here on CSR.....

On the back of the gauge is a 3 position switch. 4, 6 & 8 (cylinders). Exercise the switch through all three positions making sure to leave it in the 8 position.

Hope this helps.

 

[Timeflys]

One of my tachs "floats" .. rpm bounces around and then settles down.. would this switch solve the problem [before i start digging around back there]??

 

[mwph]

I don't want to lead anyone astray, but it's a 10 minute, one tool procedure. Certainly worth the effort to give it a try.

 

[davefin]

Believe me, the "exercise" routine mentioned above works. I need to do it every Spring, then OK for entire boating season.

 

[Timeflys]

Thanks guys..worked for me!!

 

[bbwhitejr]

Pulled the dash out this weekend to get to the back of the tach. No switch on the back. Any other ideas? I did "work" the plug a little to see if maybe it was in the connection. Will find out this coming weekend. Thanks.