View Full Version : Incorrect Tachometer Reading

06-07-2006, 09:35 AM
When I attached a dwell meter to my coil it reads 650 RPM yet my tachometer reads 1,800 rpm. Does anyone know what is up with this? (1983 S&S; 351) Any brand name favorites for replacement tach?

06-08-2006, 07:47 PM
Most Tach/Dwell meters I have seen will have a switch or a knob to set it for a 4, 6 or 8 cylinder engine. Is the dwell meter you're using set up that way?

06-12-2006, 09:03 AM
My tach works fine at 2000 rpm and above. I ordered a new tach from DIM over the weekend; Iíll post my results after I install it.

06-23-2006, 11:13 AM
I installed a new tachometer last weekend; Iím getting accurate RPM readings through the whole range now.

08-23-2006, 12:51 PM
I'm not getting accurate readings below 1000 RPM and the tachometer shows 1000RPM when it's in fact running at iddle speed 650/700 RPM....

It's a teleflex tachometer with the hours counter integrated. it's the original one of a PS190 year 93.
Is there something to adjust on it ? or should I change it? Where can I find the original one ? if it is still available. Thanks in advance.

08-24-2006, 07:00 PM
I'm unaware of any adjustments that can be made. I just ordered a new one from Discount Inboarc Marine (online)