Guests - If You want access to member only forums on FM. You will gain access only when you Sign-in or Sign-Up on Fishing Minnesota.

It's easy - LOOK UPPER right menu.

Sign in to follow this  
Followers 0
Down Deep

How do I adjust a Tachometer

3 posts in this topic

I have a 2007 Lund with a 115 HP Merc 4 stroke. When I go to WOT the tach goes to 9000 (highest reading) It is trimmed properly. I called the dealer and the service tech told me that the engine is not red lineing, but the tack needs ajusting. This engine will sound an alarm and shut down if it over revs. He said they are backed up in the service dept and said I should be able to the adjustment. He gave me instructions, but how do I know if the tach is right.

He said the idle should be 800 and WOT at full trim should be 5800. There is a knob on the back of the tach. Experts????? Is this something I should be doing or should I take it to the shop?

Thanks

Share this post


Link to post
Share on other sites

It's something you can do very easily and will take just 5 minutes.

I the back of the gauge there's an adjustable selector, just turn it to the correct settings with a screwdriver. You can do it while motor is running too, to check for accuracy.

It will turn easily, you might have to press inward a little to have it turning.

It will be one of these:

- Perfect (idle at 800rpm, WOT 6000rpm)

- Way off (idle at 1500rpm WOT 9000rpm)

- Zero readings

See picture (sorry a little out of focus):

lundtachtan2sm.jpg

Share this post


Link to post
Share on other sites

Thanks Valv. I will give it a shot.

It's great to be involved with FM.

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  
Followers 0



  • Posts

    • BassThumb.
      Yeah, but this one is packed with useful information and tips, and not everyone who browses the site today saw this in 2015. It's really a great thread, and that's why I bumped it.    Wouldn't it be more sensible and more useful to the members of the site to simply edit the title and remove the "2015"?   ***How about it, mods? Rejuvinate this thread with a new title!***
    • ZachD
      Was just south of Crosby on a small lake searching for eyes. Missed one that smacked my rippin rap twice Missed one on a bobber Then my buddy missed one on rattle reel   Just wasn't our day
    • cookie129
      wow what a shot  
    • ZachD
      Has anyone tried out the polar bird hub houses? The floor looks like a neat concept I wonder how well it works. Looking for a small 2 man hub so I don't have to drag my huge heavy 6 man thermal hub when I go alone.  
    • ZachD
      I don't care if dnr checks me multiple times a day or I have to prove that I am not doing anything wrong. That is how they catch the guys who are doing stuff wrong. I am always legal so What do I care I have been checked what like 5-6 times in my life so far even if every time they were a bad_boy ( they were not ) who cares I have to deal with them 10-15 mins out of my day? Think about how many pricks they have to deal with every day.