Cheap Ebay Tachometer Explained

[@Free_Ranger_CT110]

Thanks for uploading this. I'd messed up my settings & lost the instructions. This was a huge help!

[@astonmartin4360]

Very helpful, thanks.For those confused the caption should have read four stroke single cylinder,not four cylinder single clinder.And revelations are in the Bible,revolutions aren't. 👍👍👍

[@mygiguser]

LOL, yes the spellcheck didn't do well in this case.

[@algorel4763]

Excellant video. My instructions that came with he unit were wired to say the least. Thanks!

[@BenSmith-gx1om]

Great job on how to work this tac

[@malcytull]

Great video, very informative, thank you for sharing.

[@FMG1964]

Thank you for making this video. You answered my questions, so now I know what to buy and how to use it.

[@justindunafon8580]

THANK YOU for making this video! For those in the comments asking what setting to use for their two or four stroke engine, you simply NEED to find out how often it fires. Some four strokes fire once per rev, and some two cylinder two strokes fire twice (JS550 for example).

[@AndresCuervoArt]

Justin, so if my engine is 4 stroke 2 cylinder and the spark fires 2 times per cycle what setting to use?

[@Indietro25]

Settings 2

[@2smokes]

@@AndresCuervoArt just it when idling u need to have a normal number

[@gmcinnis6304]

remember some. many? all? small engines FIRE EVERY TIME THE MAGNET GOES BY THE COIL even if it is a 4 cycle engine. the extra plug firing is on exhaust stroke so it does nothing but spark the plug as it is in overlap of exhaust valve closing and intake valve opening at TOP DEAD CENTER with no fresh fuel in the cyl to ignite... the next revolution will have fuel/air in it to ignite. so that is where ppl get confused in directions... need to pick the on ... actually 2 that states "fires once per revolution" as the plug is firing EVERY REVOLUTION on coil type small engines, just no fuel/air to ignite on exhaust closing/intake opening of the 4 cycle engine so nothing happens with the spark, just wasted spark... but the meter "reads" the spark so ... need to pick #2 "fires EVERY REVOLUTION of the motor" ... even on 4 cycle engine. it wud be the same on 2 cycle engine too as it too fires EVERY TIME the piston comes to TOP DEAD CENTER, but there is fuel/air in the cyl every time the piston comes to TOP DEAD CENTER so there is a power stroke on the 2 cycle every time piston comes up... but the setting on the meter would be the same ... #2.... fires every time the piston comes up.

[@kriskris-vb1ci]

Thanks very much for the explanation! Can this tachometer be used on a 1996 1.2 Renault Clio monopoint injection engine?

[@olofjonsson4874]

Thanks! Just what I needed to see

[@Miklalo]

Thanks i am going to try this on my motorized bike 2 stroke

[@Konstantinosmo]

Finally you tested it? In programme no 2?

[@phillange166]

A clear explanation, thank you.

[@pitapitabread]

thanks!

[@wow6704]

Should my tachometer turn off eventually? I don’t think mine was

[@mygiguser]

it never turns off

[@nw8000]

It worked for me in the UK Thank you

[@bobstanden6579]

Thanks for the vido I have a question Can you shorten the wire if you have the tach mounted on a machine to neaten up The install Thanks Bob

[@Jim-ie6uf]

I could never figure mine out. This weekend for sure. Thanks.

[@arr2ro]

Very good explaining thank you 🙏

[@GregPhillip]

Great explanation...thanks

[@Thomas-nz4uh]

I purchased one of these for my Husqvarna 128 LD weedeater. The manual says the idle rpm's are between 2800-3200, so I have the rpm's set to 3,000, but the max speed should be set to 11,000 rpm's. My question is, how would I get this techometer to show 11,000 rpm's?

[@ulisescruz8357]

Thank you well explained very helpful

[@charliewilliams8026]

It's not helpful I'm hitting the s1 button for 4 seconds and it's not doing anything

[@lonestar3433]

You are the man. Thanks for an informative video.

[@kevinhamming4514]

Sorry about keep making comments but needed to clarify. since I know that a honda metropolitan idles 1500 - 2000 rpm the only thing that made sense is setting mine to match this rpm. The only way is by setting it to 1 on the tach setting. Other wise any other setting is at least twice or too high.

[@mygiguser]

Well, that engine is more advanced than a lawn mower. As i can see in the wiring diagram for that Honda Metropolitan, they have an ECU that triggers the ignition, and therefore it may very well ignite only half of the time a lawnmower engine would.

[@kevinhamming4514]

Fires once per every 4 revolutions both are same.

[@olofjonsson4874]

Can I cut the cable to a custom length without affecting the function?

[@mygiguser]

yes, i think so. but make sure it's lng enough to wrap around the ignition wire!

[@anthonyscheer9420]

I have a Yamaha vstar 650 vtwin what setting would I use?

[@Konstantinosmo]

How does the digital tachometer switch off ( without the way of reseting it)?

[@squidben5780]

Excellant video. just bought one, waiting for it. Just changed carb on tecumseh 9hp and rmp sounds real high so waiting for this to properly adjust.

[@marilecescobia391]

Is there on off switch forthis device?

[@squidben5780]

No turns itself off and on as soon as it senses some current from the spark plug

[@squidben5780]

In theory with the battery it's always on listening to some voltage but display is off after some time of inactivity

[@kriskris-vb1ci]

Hi, which setting should I use for a 4cyl car engine? 1996 Renault 1.2 E7J monopoint injection engine to be precise. Number 3? Thanks!

[@untitledduck9675]

So i have a 80cc 2 stroke engine so every 1 rev is 1 spark right so select 2?

[@Indietro25]

Very helf thanks good info

[@techtinkerin]

Cool very helpful 😊

[@fotogenia2]

Hallo my friend Who is the correct mode for a chainsaw with one cylinder; Mode 2 is correct ; Thanks

[@algorel4763]

Just to be clear, I am setting up mine on a new Honda mower, 4 stroke. Which code should I select? 1, 2, 3, 4?

[@royceleanzer]

@Dipak Rathod hi Deepak,. Have an rd 350 , what's should the setting be . It is a 2 stroke 2 cylinder

[@haraldpost]

How does the battery hold up? Is thing useful in practice an hour meter?

[@mygiguser]

Mine is still working on my lawn mower, and i made this video 6 years ago. It probably dies right after i write this. If you need an hour meter for like oil changes (mine does every 50 hours), then it's great.

[@haraldpost]

How often did you need to change the CR2450 cell?

[@mo-ni]

@@mygiguser hahah WOW, 6 years. But I think youmade a mistake may be. For lawn mower which is 4 stroke engine, it should be "03"- every other revolution. And for 2 stroke engines like weed eater(weed wacker) it might be 02- once per revolution. Isn't it right?

[@syfulskate918]

Thanks for the explaination. Really understand it how to use tachometer. Thanks mate

[@kevinhamming4514]

Firing occurs on the power stroke in a 4 cycle engine. So that means after 4 strokes you have two revolutions of the crank for every ignition. Power stroke, when ignition occurs. 1/2 revolution, Exhaust stroke, another 1/2 revolution, intake stroke 1/2 rev. , Compression stroke 1/2 rev. for a total of two revolutions of the crankshaft. So this should equate to every other revolution (2 rev. per ignition), which is option 3. The instruction manual is lacking info to select firing for proper rpm display depending if you have 2 stroke or 4 stroke. If you have a 4 stroke lawnmower and select code 2 you will display the wrong rpm. I thought you may want to know this.

[@mygiguser]

Ok, let me explain this. Your theory is correct, but we have a very simple engine design here, on the lawn mower for example, where the ignition fires every rpm. Means you get ignition twice as often as is needed.

[@PetVa-s1h]

Why is my one showing low rpm when I increase the rev?

[@mygiguser]

i don't know. Maybe wrong settings?

[@PetVa-s1h]

@mygiguser I have tried all settings 01 02 and 03, still the same

[@khoitran5735]

i am using this product on a scooter 4 stroke Fi,in mode 2,RPM is not stay like your video,any advise sir?thank a lot.

[@merijn1254]

So standard mode is for a 1 cylinder two stroke?

[@rafal.talaga]

I hbae same question

[@Sci-Fi-THC]

I need to see how much my 2009 Honda rebel 250 engine revs at which mode would I use

[@truckman7123]

Does this work on petrol car? Battery operated?

[@mygiguser]

yes, and yes

[@truckman7123]

@@mygiguser battery size is ?

[@dragstarsuleyman98]

Thank you

[@drsierra1]

CAN SOMEONE TELL ME WHAT SETTING TO USE TO MEASURE TACH ON HARLEY TWIN CYLINDER ENGINE ALSO IS WIRE THEN WRAPPD AROUND ONE PLUG WIRE OR BOTH

[@mygiguser]

HI ED! YOU WOULD LEAVE IT IN DEFAULT MODE2. AND THE CABLE WRAPS AROUND 1 IGNITION WIRE 4 TIMES. HOPE THIS HELPS!

[@shanto8381]

how too setting in...4 stroke 1 cylinder engine.......please anyone reply

[@mygiguser]

2

[@shanto8381]

@@mygiguser please tell me honest opinion...is it read actual rpm or not

[@bobstanden6579]

I bought one of these For my 4 stroke mower It doesent work properly I set it on 02 forv4 stroke It reads 1300 at idle and 1600 at full throttle So that's not Wright I tryed it on 01 and 03 All so still no good All so it made the mower very hard to start Like it taking all the spark away from the plug ?? I tryed differnt amounts of wrapping around the plug wire No difference Take the rapping of the plug wire it starts first time I have returned it

[@turbofiat]

I used this tachometer to set the idle speed on my 2 cylinder 2 stroke Trabant 601! Then I tested it on my Citroen 2CV which is a 2 cylinder 4 stroke engine but uses a wasted spark ignition system. I got about what I expected on both engines. I figured I'd have to do some dividing or multiplying to get the correct RPM but it was spot on. I was using a Sears engine analyzer. I would have to set it to the 4 cylinder mode then watch the needle bounce around, write down the lowest reading and the highest reading, add the two together and divide by 2 to get the average.

[@Lithfkn00]

I just got mine in the mail to test on my 2 stroke outboard engine. It is currently on and I don't know how to turn it off. Any ideas??

[@michaelsearles8654]

So do i just wrap the end of the wire around the spark plug wire?

[@mygiguser]

yes, that’s how it is done

[@danielcizmar2478]

Hello to everyone. Please help. My question is for Yamaha F8cmhs outboard 2008 4 stroke & 2 cylinder. Which code should I take for right reeding. Thx for helping me !!!

[@orlypalomar]

Thank you. Does the thing factory-reset when the battery dies or if you replace it with a new one?

[@mygiguser]

i have no idea

[@orlypalomar]

@@mygiguser While the engine is running, can you switch the display between tachometer and running hours?

[@ReLineGuy]

Can you extend wiring ?

[@mygiguser]

idk

[@wrenreymangubat9602]

Show us were you put it

[@mygiguser]

what do you mean? I show how to use it on the snow blower

[@ASUSfreak]

How about a Yamaha RMAX2 SE engine? It's a 1000cc twin cilinder petrol... I'm an elektrician, not a mechanic 😅

[@pavloskourris277]

I just got one, how to you switch it off?

[@ShivaKumar-sc5yq]

For 2stroke settings sir

[@mygiguser]

mode 1

[@jaakkooksa5374]

I found written instructions by googling for "S1 S2 tachometer" (without the quotes). I honestly cannot understand the RPM setting. In a 2-stroke engine there is always one spark per revolution, therefore you would set it to value 2. In a 4-stroke engine there is one spark every other revolution, therefore you would set it to 3. However setting 1 supposedly means that there are two sparks per every one revolution. But there exists no engine where the spark plug fires twice per every revolution of the crankshaft. What on earth do these settings actually mean?

[@mygiguser]

Jaakko Oksa they count the revolution of the crankshaft, not the camshaft. A 2 cycle engine fires at every revolution of the crankshaft, a 4 cycle fires usually every other revolution. But you could have engines that ignite the sparkplug during the work cycle and the exhaust cycle.

[@jaakkooksa5374]

@@mygiguser Sorry, I was in a hurry and I wrote camshaft, when I meant crankshaft (two stroke engines do now even have a camshaft since they have no valves). Therefore, for a two stroke engine, such as a chainsaw, the correct setting is "2", am I right?

[@sasahorvat3137]

What seting is for 2 Cilinder 4 stroke engine ?

[@AndresCuervoArt]

Hello, For a 4 stroke 2 cylinder V twin harley carburated what would be the setting? stock is dual fire spark "A single coil winding with two high voltage output terminals fires the spark plugs on both cylinders simultaneously. Each plug is fired twice during each four stroke cycle"

[@mygiguser]

That would be mode 1, because you fire twice per revolution.

[@AndresCuervoArt]

mygiguser thanks

[@AndresCuervoArt]

Just got it in mail it’s setting 2!

[@harshvardhansinghrathore1079]

Hey Is this device works on AC motor to count hours or minutes when we supply electricity to motor?

[@mygiguser]

harshvardhan singh rathore no, it doesn’t

[@sonicboomin]

i have a briggs stratton 6.50 push mower 4 cycle engine, is that mode 3?

[@nexsulTV]

There a way to turn if off?

[@patrickviray6934]

what settings for 4 stroke

[@mygiguser]

mode 2

[@AndresCuervoArt]

Harley 4 stroke 2 cylinder evolution big twin is Setting 2

[@kevinhamming4514]

According to what the rpm meter reads it should be half of what the display reads if you have code 2 selected.

[@goranpavlovic9051]

Why half

[@pdevonport7266]

Code one is every revolution as in two-stroke. Code 2 is every second revolution as in four stroke. In other words, a four. Stroke fires every second revolution, so you if set on one It will only read half the revolution speed, example motor rev at 3000 per minute will only show 1500 per minute on the meter.

[@kevinhamming4514]

@@pdevonport7266 If you set it on one it will read every revolution so it will show 3000 if it's 3000. A 4 stroke will read every 2 revolutions meaning you have 4 revolutions so you multiply by 2, so it will read 4 revolutions. If you set it on one it will read every revolution showing and measuring 1 revolution which will be actual read once, one revolution. If I set it to 2 it will read once for 2 revolutions. So if you set it to one on a 4 stroke it will think it's been 4 revolutions and will be reading 4 times higher or 4 times 3,000 which is 12,000 rpm. Do you understand this? As you can see not enough info is given. If I'm reading a pulse from the flywheel when it rotates I also have to prevent firing on the intake stroke. Every rotation a coil gets a pulse from the flywheel which is the ignition pickup providing spark to the sparkplug. So it's not so simple. The only way to be 100 percent sure is a test instrument tachometer for a scooter which I can't find.

[@guilhermedesouzagomes1780]

Can i use in a 4 cilinder car?

[@tigerofiraqwhoisallahquien8044]

But where did you hook the cable to

[@mygiguser]

you just wrap it around the ignition cable, the one that goes to the spark plug

[@tigerofiraqwhoisallahquien8044]

mygiguser oh ok thank you so much

[@patwilliams5327]

would setting 1 be for a 2 stroke 2 cyl engine?

[@mygiguser]

pat williams yes, that’s right!

[@allardmol8198]

Hallo i have a probleem i dont get solved Mine s keep saying service count to ten en then after 3 seconds starts again what Should i do your tips dont work🤷‍♂️

[@AndresCuervoArt]

HOW TO POWER OFF?

[@mygiguser]

Andres watch the video. Hold S1 and release when it shows 04.

[@chrispickering8812]

Why in the world did you not show the tach display as you adjusted the throttle. Dang

[@oguzhankocak7594]

Hı i have a scooter 1 cylinder and 4 stroke so should ı use mode 2 ? And the other question is when ı want to adjust my Air and oil which mode should ı use Fırst ? carburator

[@mygiguser]

Oğuzhan KOCAK mode 2

[@johnr4898]

the one I bought had no instruction sheet ty!

[@doglegjake6788]

just like on a harley , but you can use a single fire ignition but it wont have the cool sound of a harley

[@perryhann5847]

What is setting for a chainsaw

[@mygiguser]

2-cycle? Mode 1

[@katsegela]

Hello my friend have you ever change a baterry??? Is easy?

[@techtinkerin]

Yes

[@topflight2358]

CAN YOU JUST TOUCH THE PLUG WITH THIS UNIT INSTEAD OF WRAPING THE WIRE EACH TIME ???

[@mygiguser]

no

[@meanderingmike7640]

@@mygiguser do the wires have to be bare? Im confused by what they mean by wrap it i figured i had to hardwire it in?

[@sidewayzmike]

@@meanderingmike7640 I am with ya. My hour meter, I ended up stripping the insulation back, exposing the two fine internal wires (I did not strip these wires individually). Then, I wrapped the two fine wires, about 5 times around my spark plug boot (as the directions stated, as online research suggested). My idle speed for a small 6.5hp 196cc 4 stroke, is fairly accurate, with the idle specification. When I run the engine "up the ladder" peak rpm seems somewhat delayed/accuracy doesn't come fast enough for my liking. My theory, is maybe try wrapping the 2 fine wires, around the plug wire, and then try wrapping directly around the spark plug. Experimenting, should yield better results, I hope.

[@juliustorre3746]

May you pls help me... I have the same Tachometer, I use it on my Honda Super Four. 4 Cylinder, 4 Stroke Engine.... What mode should I use?

[@joaofilho7134]

3

[@bhavinmuliya442]

Price

[@mygiguser]

look it up on ebay, it was cheap

[@mygiguser]

9 USD today

[@125nsr]

So the mode should i used for a one cylinder 4 stroke is num 1 ??

[@mo-ni]

NO

[@lundras59]

Just to be clear, I am setting up mine on a new Hidea 2cyl 4 stroke. Which code should I select? 1, 2, 3, 4?

[@mygiguser]

should be 2

[@Konstantinosmo]

@@mygiguser Mode 1 is the correct answear (according to instruction, mode 1 is when spark plug fire twice per revolution)

[@Sci-Fi-THC]

@@Konstantinosmo is it 1 or 2

[@my-max-media7621]

Can it be set to show hours while engine is running? Instead of rpms

[@ctrlaltdebug]

set rpm setting to 04

[@MadiliaSarwary]

whicht setting do i need for 4Takt 2 cylinder

[@mygiguser]

I explain it in the video. Depends on the motor. What motor is it?

[@MadiliaSarwary]

Suzuki Intruder VS 800 4T 2Cylinder@@mygiguser

[@slapshock2787]

is it accurate?

[@mygiguser]

yes

[@slapshock2787]

@@mygiguser thank you

[@misiuyogi5082]

Is it possible to turn it off without reseting the device?

[@mo-ni]

good question

[@Budro4764]

Good vid on that Tachometer........ I have 3 questions for you ........ Does it turn off by itself ?? Can you post the link to the item ?? Are you satisfied with the Tach ??

[@mygiguser]

Boo LuQuette i think it is always on, like a wristwatch, i posted the name of this in the description, enter it on Ebay and you’ll find it, and yes i love it, it works great.

[@Budro4764]

Yes I saw the name name you posted but it ia generic name and I get 200 different sites..... Do you remember the company name or the exact link to the sale ???

[@mygiguser]

No sorry i don't remember, i probably picked the cheapest in the list.

[@abhinav13d]

@@mygiguser it's not show correct RPM

[@teamsmokingpistons4432]

Sir which code for two stroke engine?

[@Antonio-oz8eu]

2

[@sstlrwp4244]

what will be the setting for a 4 strock single cylinder engine.

[@mygiguser]

SS&TL RWP setting 2

[@sstlrwp4244]

thanks allot

[@saikrishna855]

How to off

[@mabgn8807]

Hello. What is a setting for a chainsaw 2 stroke 1 cylinder ? Thank's

[@mygiguser]

Mode 2

[@Konstantinosmo]

Mode 1 is for for 2 stroke engines (according to manul, is the right mode when the spark plug fires twice per revolution)

[@sasahorvat3137]

What is setting for 4 stroke ,2 cyilinder engine

[@ngzcaz]

Instructions were good.. Video of the concrete and the throttle not so much...

[@robertreyes6613]

Thanks, I lost my instructions.

[@doglegjake6788]

a four stroke engine fires every revolution just like a two stroke even on the exaughst stroke

[@mygiguser]

jake williams not all 4-stroke engines fire in the exhaust!

[@doglegjake6788]

you are right ,, but they do on small engines , harleys and older cars even chainsaws , lawn mowers , weedeaters , but not on modern cars the computer controls the fire at single fire

[@joshuaharrison9331]

how come I have watched this vid & read all the comments & still don't know which setting is for a 2T engine. ffs

[@nsxproperties560]

A 4 stroke's power stroke is on every other revolution. Wouldn't that be code 1 for the snow blower?

[@mygiguser]

Mode 1 for 2 cycle, mode 2 for 4 cycle

[@thakorvaibhav3363]

my scooty. 4 stock

[@martinkuliza]

This is a good video however THE METER IS NOT ACCURATE the readings it gives are bullshit i get 90rpms AND THEN it can go up a second or so later to 3000 rpm whatever it is , accurate or not the reading should be approx stable. thats my first requirement secondly, it needs to be accurate I've double checked this on my whipper snipper with my Oscilloscope. this does not read correctly also, when i inject a known stable signal into it , Like 1Khz it doesn't read the correct reading

[@mygiguser]

Maybe yours is broken? I don't see that with the one i have here.

[@martinkuliza]

@@mygiguser That!! at least is encouraging. the one i have is absolutely brand new, purchased a few days ago . ill try what you showed in the video, see if it makes a difference i think the seller was dodgy. the thing is.. i think they sell it thinking that people won't notice I on the other hand have technical instruments to actually check if it works and if it's correct for $13 i don't expect dead on accuracy but i do expect it to be say within 10rpms of accuracy

[@catdakman1273]

What I mean is..... I think you explained it wrong..... A 2 stroke / 2cycle motor turns one time per one spark of the plug. A 4cycle motor turns 2 times per one spark of the spark plug. I just recieved one of the tachometers , and need to learn how to set it for a single cylinder 2 cycle/ 2stroke motor.

[@joshuaharrison9331]

what code for a bloody 2 stroke!? just 1?

[@randygarcia7577]

What mode for a 2 stroke outboard motor

[@gokartsmichigan1255]

How did you set it up? does it just get wrapped around the outside of the spark plug housing?

[@mygiguser]

GoKartsMichigan yes, usually you wrap it around the wire.

[@gokartsmichigan1255]

Thanks for the quick response!

[@lawrencefure2102]

Would code 2 work on a 4 stroke 2 cylinder engine, or is that what code 3 is for?

[@mygiguser]

I would think it is mode 3, but it depends on the ignition system.

[@lawrencefure2102]

My four stroke engine fires every revolution, because it has a wasted spark system. So now I'm thinking it should be set on code one. Is that correct?

[@jayirving6996]

Dude mine is default to code 1 for tach.. I've done it exactly as you shown and still won't actually set to code 2..

[@mygiguser]

JAY IRVING maybe it’s broken

[@skunkhome]

Gosh read the manual before trying to explain. This is painful

[@ericsmith8828]

I have the same one - there isn't much of a manual, as with a lot of things.