MOTOR METER RACING52mm 2-1/16" Universal Tachometer for Diesel Engine Alternator 6000 RPM White Dial in Dash

Easy to install, works great on Mercedes Benz 190E

Have not installed it yet on my gmc 6.2 diesel. Overall product looks better than expected for the price can't wait to see how it works.

Had to set it to 8 cyl to kind of work for my 4 cyl and it’s sporadic. The light is barely visible. Can’t read the dial at night.

93 cummins did aftermarket alternator that has a tach signal, this tach isn't accurate at all besides idle gives you an idea but could't set rpms properly for the 6 cylinder setting had to use the 8 cylinder setting.

Very good product

I bought this diesel tachometer hoping for better luck then what's been said in the reviews.. Well when I got it I hooked it up and readings were way off! I had to figure out what rpm my car was running at then set this tach to 8cyl which my car is only 4 then I used the screw in the back to dial it down. If I set this to 6 or 4 it would read way too high. It does work once set where it needs to be. I'll be running it for a little while to see how it reads then getting back with a follow up.

Fits as it should, does not work for my 4 cylinder diesel. Set on the 4 cylinder setting, and it reads 5.5k... have to adjust to 8 cylinder and it gets close.

Good

installed on GM 6.5 dieseldid not adjust low enough for my 720 RPM at idleby the time I got to 2000 RPM guage was reading 3000by the time I was able to install and test i was too late to return, waste of 70 bucks

I did not even have the support with .. we are having