I'd like to find a good underhood tach that will read numbers like in .25 or .50. I'm guessing nobody makes analog ones anymore although either will be fine. I need to adjust my RPMs in the ol' truck. It has a horseshoe bracket for the coil, so alligator clips make it impossible to clip on.

Nothing too expensive. Used is OK.

Any suggestions? Thanks.

 

You should be able to find the old tach & dwell meters , There great for setting idle & adjusting carb ....I have an old snap on one that works great , its about 30 years old .. LOL ... Lew

 

Cool.

I only wonder how accurate they are anymore after use and all these years?

 

Use the built in zero set screw, and they're as accurate as when they were new.

 

That's right. Assuming there's one...off to to yard sales / flea markets tomorrow for a new one.

 

The Actron one they sell at Autozone and Advance Auto is inaccurate out of the box, even using the zero screw.

I ended up buying a $99 digital timing light with tach for my work, comes in handy since it works on 2 cycles too.

 

I scored a Mac Tools ET-360 - dwell, tach, voltmeter, and ohmmeter. It came with a Ford horseshoe adapter! Perfect! It also came with its manual and etc in its box.

Cleaned, set the zero-out, and put in a new battery. Works beautifully.