Posted by Indiana Ken on March 14, 2015 at 18:37:10 from (67.163.32.18):
I have an electronic tach I would like to use on a single cylinder 4-stroke engine. My engine has a crank trigger and fires once each 360 degrees of crank rotation. The tach is for a single cylinder 4 stroke however, it appears to be calibrated for a spark every every 720 degrees of crank rotation.
The tach requires 12 volt power and takes a signal from the (-) terminal on the coil. It works fine except, it reads 2 times the RPM the engine is actually running.
Is there a device I can buy or a circuit I can make that will count to two then output one signal, such that the tach will read actual engine RPM?
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Today's Featured Article - Tractor Profile: Allis-Chalmers Model G - by Staff. The first Allis-Chalmers Model G was produced in 1948 in Gasden, Alabama, and was designed for vegetable gardeners, small farms and landscape businesses. It is a small compact tractor that came with a complete line of implements especially tailored for its unique design. It featured a rear-mounted Continental N62 four-cylinder engine with a 2-3/8 x 3-1/2 inch bore and stroke. The rear-mounted engine provided traction for the rear wheels while at the same time gave the tractor operator a gre
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