Best Tachometer for saws

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I just bought this tach from a small engine shop on Ebay.

dti-tt20k-1.jpg


* Reads Engine RPM up to 15 inches (35 cm) from the ignition wire
* ON and MODE Button Turns off automatically
* Display Window protected with Lexan film
* Displays up to 20,000 RPM with a 10 rpm accuracy
* Engine RPM is updated every .5 seconds
* Large Display for easy readout
* Shielded antenna lead for “hands free” operation included
* Replaceable 9V Battery included
* Weather Proof housing including protective “rubber” casing
* Can be set for single and multi cylinder engines, 2-cycle and 4-cycle
* Maximum Recall of RPM
* Complete Operating Instructions included
* One year limited factory warranty


I have sent a message to the seller to see if he has more available. It seems like a great unit with fast .5 sample rate, replaceable battery, max RPM readout, etc.

I'll post a follow up once I get the tach.

It was $99 shipped

EDIT: he does have more available, and as a newbie 'round here, I would love to know the appropriate way to share info for those interested.

I own one as well. Very satisfied with it.
 
Edt 5

Just a update. Received the EDT 5 today and it is a sweet tach, reads fast as you hit the throttle. It also takes a CR 2032 lithium battery for replacements. approx 20,000 hours for battery use per battery. So I should be set for life now with a tach with replaceable battery.
Thanks Lake for the tug toward the 5, since dont plan on buying the new saw for a long long time that uses the newer style tachs.:biggrinbounce2:
 
I bought the $24 tach, it works alright, but its slow to update.

Got my 353 leaned out a bit, hopefully it will keep the E-Tech muffler as cool as possible. Im looking forward to getting a sharp chain on it and cutting, see how it runs.

I tached it out to 12,200-12,150. I could tweak it a little more if I so desire...

Back to the tack, I just wrapped it around the spark plug wire, they leave a bit of stripped wire that I assume would be used to crimp a clip on? Maybe if you want to clip it on the spark plug lead vs. wrapping it...
 
I have and use two different Dixson Tachometers with the analog meter. Don't know if they are the best or even rate at the top but, I like them.
Jay
 
Bought this today looks almost exactly like the EDT-8, Stihl here in Sweden said the EDT-7 has more functions then EDT-8 ,,, donno about that though :p

It's wicked fast to read the Rpm compared to the elcheapo tach I got :)


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It's possible, but the insides might be quite different. Stihl certainly doesn't make their own tachs, but they do spec them. The -7 and -8 were made to work with the newer ignitions systems.

Andy - Madsen's sent me the EDT 8, but told me about the 7 as well. They said the 8 just did 2 stroke engines and the the 7 tach'd both 2 and 4 stroke engines. I got a new Stihl 2007 catalog the other day and it said both the 7 and 8 did two and four stroke, but the 8 measured four strokes that controlled the RPMs at the crankcase (I think) and the 7 measured four strokes that controlled the RPMs at the camshaft. (?)

Who's right and does it matter which one you have if you're only using it on chainsaws?

Greg
 
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Great thread! After reading all the posts I ordered a Tiny Tach 20k today. I like the fact that it can be used on more than just chainsaws and the price/performance ratio works for me. I'll post back after I've used it a bit.
Thanks everyone!
Brad

I have owned a tiny tach for 2 years and it has worked great other than it is a little slow to up date. The thing I really like about it is you can wrap the wire around the handle bar of your saw and hold the tach in your fingers and really see what your saw is doing in the cut. You will be amazed how much more you can get out of your saw tuning it this way. I ended up running a lot leaner that I thought was safe when I tuned by ear or when I tuned it by tach out of the wood. I could still go leaner for better performance but do not really want to risk the expense of burning up a saw.
 
I ordered a Tech Tach 20TT this week. I also ordered a saw to test it on. I hope to be posting information about each next week.
 
I bought the EDT-8 recently. It works good for me. I don't know if it does 4stroke or not but it doesn't matter as I will only use it on my saw(s)

I should mention that finding this little tach at my local dealers was like searching for the holy grail. No one knew what the hell I was asking for, even with the part number!

$99 bucks and some change...once they found it!
 
So with my new tach, is it OK to warm the saw up and run it briefly at WOT to adjust the max RPM? I have a new MS460 with the DP muffler, the H and L jets are 1 turn out, but don't really know if thats enough or too much. I don't want to hurt my saw, but I don't want to run too lean unknowingly.

Greg
 
I should mention that finding this little tach at my local dealers was like searching for the holy grail. No one knew what the hell I was asking for, even with the part number!

$99 bucks and some change...once they found it!

Tell me about it! My Stihl dealer had a tach in stock but it was an older model for $100. I asked about the new tachs but they didn't know anything about them. They were busy and I chose not to pursue it. Glad you got one- looks like a great little unit!
Brad
 
Tech Tach 20K

WOW!!! This thing works great. $93.00 shipped and almost instantaneous reading. My dealer was impressed. Just get the tach within 8 inches of the top of the cover to get a reading.

I did call Design Technology, Inc. before ordering. They told me the this tach reads a little quicker (Under 1/2 second update time) than the Commercial Tiny Tach. It is not as small but still very convenient.


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Update on EDT 5. I LOVE IT!
I use it wireless all the time so far and I bet i have held it at least a foot away sometimes when used.
I still tune by ear and then check myself and then do final settings.
I like the fact that it has the replaceable battery option too.

I have one of those cheapie $24 tachs setting in the tool box taching how fast I put my tools back in forth now.;)
 
Just bought an EDT-8

So with my new tach, is it OK to warm the saw up and run it briefly at WOT to adjust the max RPM? I have a new MS460 with the DP muffler, the H and L jets are 1 turn out, but don't really know if thats enough or too much. I don't want to hurt my saw, but I don't want to run too lean unknowingly.

Greg

Found this post while doing a search on exactly this question.

FWIW, the 066 service manual says to turn the HS screw 2 turns out, warm up the engine, then run at WOT and adjust the HS screw to 12000. After that you return to idle and give the HS another half turn clockwise.

It is a bit nervewracking to run at WOT for just the time it takes to get a stable tach reading.
 
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Found this post while doing a search on exactly this question.

FWIW, the 066 service manual says to turn the HS screw 2 turns out, warm up the engine, then run at WOT and adjust the HS screw to 12000. After that you return to idle and give the HS another half turn clockwise.

It is a bit nervewracking to run at WOT for just the time it takes to get a stable tach reading.


Be real careful with WHAT YOU READ... that process is ONLY for one version of the rev limiting ignition on an OLD 064/066... It's not the process on the vast majority of them..
 
Be real careful with WHAT YOU READ... that process is ONLY for one version of the rev limiting ignition on an OLD 064/066... It's not the process on the vast majority of them..

Good catch. I just took another look, and I was actually looking at the process for the 064; the instructions for the analog 066 just sort of vaguely mention a tach after describing the basic settings, without making the procedure clear.

I was overfocused on Greg's question about running at max RPM. Anyway, I just had a few minutes to fool around with the EDT8 today, and it takes a second or so to reach a stable setting. It never got above about 11,800 (stock 660, about 5 tanks of fuel through it). That's close to what I want for milling, but I was a little leery about staying at WOT for a couple of seconds to be sure of the reading. Is that overcautious?
 

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