Well, I hate to say it, but my Tiny Tach is packaged up and will be returned via UPS to the Tiny Tach Company tomorrow.
I tried every way possible to get my Tiny Tach to give an accurate low speed reading, but, nothing worked. The lowest RPM reading was alway in the 1200s.
With the idle readings not truely reflecting the actual motor RPM, I was afraid the wide open readings might also be inaccurate. I was planning changing the pitch of my propeller and didn't want to exceed 6000 RPM.
The Tiny Tach I received may have been defective, or it is possible that my Nissan motor is somehow sending out stray signals that were affecting the Tiny Tach's RPM readings.
The Tiny Tach people were very helpful and are issuing a full refund against my credit card. A person can't ask for anything more than that! Therefore, I rank the Tiny Tach Company a great company to do business with! =D>