Guests - If You want access to member only forums on HSO. You will gain access only when you sign-in or Sign-Up on HotSpotOutdoors.

It's easy - LOOK UPPER right menu.

Sign in to follow this  
Followers 0
steffanf

Installing a Tachometer (revisited)...

8 posts in this topic

I am starting a new thread on this because I got it figured out... pretty much on my own, if I may add. As a recap, I was trying to put a tach in my boat, a 2007 Lund 1425 Classic SS with a 40 HP Merc 4-stroke EFI. The folks who made the boat (Lund) were of absolutely no help. The folks who made the engine (Mercury) were of little help.

I knew there were some unused wires under the throttle. I checked the wiring codes from Mercurys HSOforum, only to find out that I did not have the correct ones in my harness. I knew I needed Purple (ignition positive), Black (ground), Gray (signal), and Blue (guage illumination). So, after checking, I found this multi-wire pigtail under the throttle in rod-storage:

360856877.jpg

The big black plastic thing is the key here, not the individual wires. Looking at all the different colored wires in the bundle, I noticed it had all I was looking for. Someone on here mentioned that this pigtail was for hooking up SmartCraft guages... Mercurys own brand of very nice digital guages. This pigtail is supposed to make hooking up guages a snap- literally. I took off the bottom snap-cover and saw that it should be a simple install... buying the guage and hooking it up to this purple connector:

361777281.jpg

Here is where it got interesting. Mercury confimed what this pigtail was for- hooking up THEIR guages. This was the way all Mercury wiring has been set up since 2006, so it is a relatively new concept for them. So, what would I need to make this work? I was told I would need just two things: a wire-harness that plugs into this recepticle and then a SmartCraft Tachometer. He then quoted me a price of $190 for the wire harness plus $375 for the guage! Totally unacceptable! I've wired tachs before in cars and there was no-way this was going to cost this much. I was missing something here. So, I followed the wire harness to the engine and sure enough, all the correct wires were there and were connected. So, I decided to try something radical... something I'm sure Mercury wouldn't suggest. I got a used working analog tachometer and I tapped into the wires into the pigtail receptacle. I did this by soldering some thin nickel homemade "blades" to some wires and simply plugged them in to the correct slots, correlating to the correct colored wires:

361777274.jpg

Then, I hooked the wires up to the correct posts on the aftermarket tachometer. I chose to omit the blue (guage illumination) wire, because I saw no real need for it:

361777315.jpg

Before making the installation permanent, I took the boat out to the lake for a test-drive. It worked, but the settings were all messed up (unless the engine ides at 7000 RPM). All the settings that everyone told me, including Mercury customer service and the Mercury HSOforum were incorrect. The only setting that would read something reasonable was the "6P" setting. Turning the adjuster to this would show me an engine idle of around 800 RPM and WOT at around 5500 RPM...

361777311.jpg

After everything seemed to work, I made the wiring more sturdy by the receptacle by using some shrink-wrap over the wires (as shown)and tying the bundle with nylon zip-ties (not shown):

361777272.jpg

Next came the installation. There is a blank coverplate, in a "half-moon" shape, on the console behind the steering wheel. This is presumably where the guage should be installed:

361777268.jpg

Removing the plate, there are two dimples on the backside... perfect for centering the holes for standard 3 1/4" guages:

361777307.jpg

Cutting was simple using a Dremel Tool and cleaning up with a file. I put the cover back on to test for clearance:

361777304.jpg

Then, checked the guage for proper clearance. The guage mounts to the plate with a mounting bar, then I simply re-installed the plate:

361777292.jpg

All done... and it only cost me about $25... compared to the Mercury quote of $565.

Share this post


Link to post
Share on other sites

Yeah... I'm glad I did it. I'm also glad I didn't listen to the customer service reps at both Lund and Mercury. They mostly provided erroneous information, not to mention I saved enough money to buy another sonar, if I wanted to... wink

Share this post


Link to post
Share on other sites

Way to stay after it. You knew what you wanted and you went until you had it. It just drives me crazy that companies can set things up so people have to buy thier products then jack the prices up. Glad it worked out for you.

Share this post


Link to post
Share on other sites

Thanks for posting. Great to see some American resourcefulness at work!

Share this post


Link to post
Share on other sites

Thanks guys. I doubt it is truly the proper way to do things, but it works. On top of it all, this only applies to Mercury equipped boats with consoles made since 2006. Now that it has been "figured out", Mercury will have to come out with something different just to re-establish a state of confusion...

Share this post


Link to post
Share on other sites

My only concern would be something shorting out / wires coming loose... but it sounds like you guarded against that as best as possible. It's pretty lousy the mercury came out with that connector... you used to just get the wiring harness and you'd be set...

marine_man

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0



  • Posts

    • After doing a little more research it sounds like 4.0 was a pretty good and reliable motor and used to 2006. Might be a good option if I were to hang a plow on front. And they also claim this motor could go 300K miles which makes buying a older model with 100K + miles on it less of a gamble. At least one that has been taken care of. The 3.8 doesn't sound to promising from 07-11. The 3.6 definitely has more HP and also might be an option.
    • Good luck.  Hope your efforts pay off.
    • I'll be getting out again on Tuesday with the bow. It has been very hard finding time to get out this year, between work and a 4 month old at home. Last time out I spent 12 hours in the blind and saw quite a few birds during the middle of the day. Had multiple times where I thought it was going to happen but the Toms wouldn't commit 100%. Making a small adjustment this go round and hoping things come together.
    • Was thinking for hunting and maybe put a plow on it to use at my place up north. Wouldn't be my main driver. Was thinking around 15K for budget but that was before I did much looking mostly on line so far. But might step up in price for the right rig. And a lot of that would depend if I liked the newer V6 engine and 5 speed auto or 6 speed trany and less miles etc. Just by looking at dealer prices on line I would think a guy could find a pretty nice late model for around 20 or less. I think if I bought a nicer later model I would drive it more as they look like they have made the interior a lot nicer and more comfortable than the older ones. On the other hand if I ran across a real clean older one with the in line 6 and not to many miles for the right price that would be an option to. The drawback to a newer shiny one it might take a while before I ran it down the brushy trail.  
    • I am submitting this bird for Sutty on his behalf.     Forum Member: Sutty          
      Date: April 28, 2017
      Team Name: Team 2
      Youth Hunter(17 or younger): No
      Turkey Subspecies: Eastern
      State/Province Bird was Harvested In: Minnesota
       
       
      Turkey’s Stats
      Beard Length 10 inches
      Spur Length 1 & 3/16" 
      Weight 22lb 4oz
      I certify that the measurements listed above are accurate to the best of my ability.
      Forum Member: John Sutton                       Date: 4/28
      Witness: Josh Tschida                     Date: 4/28          
    • Our MN hunt this year was just about as easy as they come.  Sutty and I arrived at different times, he was late, and set up on opposite sides of the field as planned.  I could hear the birds gobbling in the valley below in their usual spot, and they sat there a long time in the cold.  Sutty couldn't see because he was on the back side of a finger of trees because he didn't want to spook anything out since he was late...  Eventually they got down and proceeded to sit on the far hill for a while longer.  I could see a 6 or so males, but suspected most were jakes, and a few hens.     Just when I was getting tired of waiting, about 8:30am, I saw one gobbler enter the field and walk straight towards Sutty's position.  As the bird got in front of Sutty, another nice gobbler came into the field.  I called to him but he wanted nothing to do with me.  Sutty shot the first bird, and the second one didn't know what happened.  Of course Sutty came running out of his blind and scared off the second bird that he didn't even know was there.      Sutty just bought a new house and had to head home asap to help his wife with packing things, and his daughter didn't seem too interested in shooting her own bird this year.  Now that she saw how ridiculously easy it is she probably won't be interested next time either.      I figured I should get to the edge of the field the birds were coming out on, and as I started moving my blind I bumped some hens that hadn't yet come up all the way out of the valley.   I finished getting my blind in place and sat a while, but it seemed we had scared the remaining birds out of the area, or maybe they were just laying low out of the wind.  In any case I went to get some lunch and let things settle down for a while.     After a couple hours of eating and casting for fish that weren't there, I decided I would head back up to sit in my blind.  Just as I reached the top of the hill to see into the field I saw three big gobblers walking across the field.  I ducked down and ran around the edge of the field out of their view to get closer.     I crawled up to about 10yd from the field edge, as far as I could go without being seen, and started calling.  They liked what they heard, but wouldn't commit right away.  After maybe 10 minutes of me cutting and purring, and all three of them strutting and gobbling out at 60-70 yards they started coming.  I couldn't see them well through the brush I was behind, and they didn't want to walk through it.  If I was at the edge of the field I could have shot them, they were within 40yd.  They proceeded to do a big arc along the field edge back to where I had just walked.     After a couple minutes of not seeing them I picked up my call, they gobbled, and then I saw them marching in where I had just walked.  When I last saw them going this direction I had shifted to face that way, I was now facing the tree I just had my back against, which put my butt in a thorn patch and the barrel to one side of the tree.  The birds started walking to the other side, so as they got behind the tree I eased the barrel to the side they were going to come out on.  They started coming up the other side back to the field they were just in and were too close together for a shot.  Finally one eased out in front and I let him have it.  He tipped backwards and rolled back downhill, and didn't even kick until I went over to grab him.  27 yards with the range finder after the fact.       Both birds turned out to be very nice old birds with long spurs.     Sutty's weighted 22lb 4oz, 10" beard, 1 3/16" spurs.  I believe this is his best turkey to date.     My bird weighted 25lb 8oz, 10" beard, 1 1/8" spurs.  My best turkey by weight and age.     Sutty and his bird.        Me and my bird.  I shot from one of the trees above this rock I think.      
    • Got it done in mn.  More to come when I get home.
    • Go to a license agent and buy one for your desired season. Season C, is on process thru May 2nd. Season D, is May 3rd thru May 9th. Season E, is May 10th thru May 16th. Season F, is May 17th thru May 31st. Season F also allows anyone with an unused tag from earlier season to hunt this period as well.   Hope this help PF.  
    • How do the over the counter licenses work this year? I missed last season but would like to get out this year even though I didn't apply for the lottery.
  • Our Sponsors