Cheap RPM guage

[aarchdale@coresleep.com]

https://www.amazon.com/Runleader-RL-HM035R-tachometer-snowmobile-waterproof/dp/B01FZ100K8/ref=sr_1_12?ie=UTF8&qid=1485518719&sr=8-12&keywords=spark+plug+rpm+gauge

 

Anyone ever use something like this... wondering how accurate they are.  My factory tach is all over the place and i just cant justify buying the MercMonitor

[Will S.]

I used one SIMILAR on my golf cart. On MY version, the end of the wire just WRAPPED around the spark plug wire. It did work just fine, but never had anything to compare it with to check calibration.

[Smalls21]

On 1/27/2017 at 6:13 AM, aarchdale@coresleep.com said:

 

 

Anyone ever use something like this... wondering how accurate they are.  My factory tach is all over the place and i just cant justify buying the MercMonitor

check out Mercury's vessel view mobile. it connects to a smart phone, pretty cool little deal

[Basfis]

Any chance your tach has a dial on the back to change its inputs? Kind of a buckle sized circle with a pointer?

if so, make note of where it is set and dial one way, back past setting then to your set point. If contacts are dirty they get flaky. 

If not, disregard. Works on faria type gauges