![]() ![]() Pushbuttons on the control panel change themode, increase/decrease advance degrees and switch between 4 and 2. Detachable and replaceable cable set Professional timing light with very bright LED digital display of RPM and Advance. 2 and 4 Stroke Tachometer measures engine speed up to 9,000 RPM. That lets you verify the vacuum advance and retard ,and mechanical advance curve on the distributor to see if it is operating correctly, and hopefully adjust it if it isn’t. Measures ignition spark advance from 0-90 degrees. Measures ignition spark advance from 0 - 90 degrees. The next purchase is an ESI 125 Digital Timing light with advance, and tachometer. Shop the professional timing light with a high visibility LED display. Accurate up to 9,000 rpm - brilliant xenon flash at all speeds. Professional timing light with high visibility LED display. The very bright display indicates: -Tach (RPM) - degrees advance. The one I have is an ESI 385A, available on eBay and Amazon. Very bright display indicates: Tach (rpm) and degrees advance. Professional timing light with high visibility LED display. With some of the engines controlled by an engine management computer, you can’t always get a good signal at the coil to drive a tach. That lets you get an rpm reading by putting the pickup on a spark plug wire. I remembered the search phrase which works: “Digital Engine Analyzer”. The normal tach doesn’t have fine enough resolution at low engine speeds to help set the idle mixture, when you’re trying to see changes of 20 or 30-rpm, at around 600-rpm in response to adjusting the idle mixture. Buy online, pick up in-store in 30 minutes. A normal tach measures 0-8,000, 10,000, or even 12,000. What part do you need today Save on Electronic Specialties Digital Tach/Advance Timing Light ESI125 at Advance Auto Parts. ![]() Typically the tune-up units measure from 0-1500 or 1-2000. You need to be sure you’re getting a tune-up tach. ![]()
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