Need a new tach

[Tothemax]

I accidentally washed my oppa pulse tach in my jeans and now I need to replace it. What is a good go-to wireless tach that won't break the bank?

 

[RedneckChainsawRepair]

I'm still using Oppama. They can be found under names of echo, archer and even the older better stihl edt-5. https://www.oppama.co.jp/tachometer-eng

To me the best without issues and slow refresh times of cheaper tachs.

 

[toppers]

Where do you guys get tach ranges for saws? Specifically, echo 3510 and 7310 I'm searching for.

 

[RedneckChainsawRepair]

Where do you guys get tach ranges for saws? Specifically, echo 3510 and 7310 I'm searching for.

Check your manuals. On 3510 was on page 56 online for max rpm. Idle, clutch engagement etc etc.
Page 58 for 7310.

 

[toppers]

so when tuning a chainsaw w/ rpm, you can just set it a couple hundred below max and call it good?

 

[RedneckChainsawRepair]

I would to be safe. I like them little fat or close and clean up in cut.

You dont need a tach for that if got good ears. But I always check afterwords with tach to see where I am.

 

[RedneckChainsawRepair]

Where do you guys get tach ranges for saws? Specifically, echo 3510 and 7310 I'm searching for.

Did you find them? I went back and saved to pics if needed after done doing my work.

 

[SteveSr]

I accidentally washed my oppa pulse tach in my jeans and now I need to replace it. What is a good go-to wireless tach that won't break the bank?

You mat be able to salvage it if you can take it apart and let it dry out. Pull the battery ASAP.

 

[toppers]

Did you find them? I went back and saved to pics if needed after done doing my work.

Did I find the RPM specs? yeah they were 13.5k for the 3510 and 12.8k for the 7310. Thanks

 

[RedneckChainsawRepair]

Did I find the RPM specs? yeah they were 13.5k for the 3510 and 12.8k for the 7310. Thanks

Good deal.

 

[Tothemax]

How many volts should the battery read?

I'm reading .998vdc. That seems awful low. It's soldered in so I would have to pop the solder and find a replacement.

There was no water present inside. It was dry. No corrosion anywhere. When I dis reinstall the screen it would try and display something then it would go away. Maybe it just needs a new battery?

 

[lone wolf]

How many volts should the battery read?

I'm reading .998vdc. That seems awful low. It's soldered in so I would have to pop the solder and find a replacement.

There was no water present inside. It was dry. No corrosion anywhere. When I dis reinstall the screen it would try and display something then it would go away. Maybe it just needs a new battery?

Let it dry anyway, there could be a trace pf moisture hidden.

 

[Tothemax]

Let it dry anyway, there could be a trace pf moisture hidden.

I hit it with compressed air but it is sitting on my bench in parts. I may put it in some rice to draw out any possible moisture.

 

[WI_Hedgehog]

This one is cheap ($13), can read most saws without the wire (all I've come across read without a wire), and if you pry the back off the battery is replaceable (I think it's a CR2032).

https://www.amazon.com/gp/product/B08LYLY4RH/

 

[toppers]

Good deal.

Another question, this RPM rating is out of wood right? Full throttle not in wood I mean, vs in wood?

 

[Tothemax]

Another question, this RPM rating is out of wood right? Full throttle not in wood I mean, vs in wood?

You set RPMS out of the wood. It is the max RPM the saw should run no matter what.

Technically, you could set the max rpms while cutting wood as the saw will always drop in RPMS while cutting. The extra rpms will help the saw cut through wood. But you need to be careful as if you run the saw full throttle with no load on it, you would be above the max recommended RPMS.

 

[Oletrapper]

I accidentally washed my oppa pulse tach in my jeans and now I need to replace it. What is a good go-to wireless tach that won't break the bank?

Steve R is correct. Remove the battery. Remove as much of the case as possible. Let it dry out for several days, maybe weeks. They operate on very low voltage. Although it is true that water and electricity don't mix, being very low voltage, there may have been no damage. What the heck, it's worth a try. jmho OT

 

[mbrick]

You could also rinse it down well with isopropyl alcohol.

I accidentally got one wet and there was a little mineral buildup on the board, seemed tiny. Toothbrush and IPA and it works again.

I'm not sure about the battery voltage.

The Oppama is so much better than any others... fast refresh too.

 

[Oletrapper]

How many volts should the battery read?

I'm reading .998vdc. That seems awful low. It's soldered in so I would have to pop the solder and find a replacement.

There was no water present inside. It was dry. No corrosion anywhere. When I dis reinstall the screen it would try and display something then it would go away. Maybe it just needs a new battery?

Odd that it is soldered in. Voltage should be on the battery. Very small numbers. Are you sure your volt meter is set correctly? Pics would help. jmho OT

 

[Tothemax]

Odd that it is soldered in. Voltage should be on the battery. Very small numbers. Are you sure your volt meter is set correctly? Pics would help. jmho OT

I'll try and take a picture today. There were no markings on the battery but I am guessing they are on the bottom side. Most small coin batteries are 2 or 3 volts. The volt meter autoscales so it should be accurate.