How do I set up rpm gauge fires per rotation?

Looks like you got lucky. I couldn't get the cheap piece of crap I bought to read correctly on my 4 stroke. You get what you pay for.
 
Looks like you got lucky. I couldn't get the cheap piece of crap I bought to read correctly on my 4 stroke. You get what you pay for.

Did you set it correctly? or maybe ya need to replace the battery

2 stroke 1 cyl - 1P1R
4 stroke 2 cyl - 1P1R

4 stroke 1 cyl - 1P2R

2 stroke 2 cyl - 2P1R
4 stroke 4 cyl - 2P1R
 
The battery in that gauge is not replaceable/rechargeable. It's disposable.

Really, no battery, that's too bad, ya should of checked before ya bought it.
I thought they all had a replaceable battery

Mine has a battery

DSCF9410.JPGDSCF9408.JPG
 
I just read the Tach description of the Tach ya bought
It also has a battery that can't be replaced,

It seems to have the same battery as mine but yours can't be replaced.
Here' s some info on battery life est.

DSCF9411.JPG
 
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The first one I bought had a replaceable battery, it got moisture and died. The second one is non replaceable and still going strong!
 
Yeah, it says to mount it so it wont get moisture or grease, high humidity will cause moisture
It says moisture will cause the battery to discharge.

I got mine to tune up a M/C that didn't have a tach
Now it just stays velcroed to the side of my tool box until I need it again
 
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