Joined
·
4,457 Posts
Just hooked up the tiny tach to my new merc sea pro.
There are 2 cylinders on this motor just for reference. Max RPM per the manual are 5000-6000
Idle RPM is not specified in the manual so not sure what I should be expecting.
At first the tach was set at 360 degrees which = 1 spark per revolution. The wire was hooked up to the bottom spark plug wire. Idle rpm read 4000 - 4100rpms with the ear muffs hooked up on the hose.
Reset tiny tach to 180 degrees which = 2 sparks per revolution. Wrapped once around both spark plug wires, per the technicians reccomendation at tiny tach. Idle reads 1860 -1900 rpms.
Still seems like a high reading for idle.
Any ideas or experience on how low should I set the tiny tach degree setting? 120 degree = 3 sparks per rev
90deg = 4 sparks per rev
60=6 sparks per rev
45 = 8 sparks per rev
There are 2 cylinders on this motor just for reference. Max RPM per the manual are 5000-6000
Idle RPM is not specified in the manual so not sure what I should be expecting.
At first the tach was set at 360 degrees which = 1 spark per revolution. The wire was hooked up to the bottom spark plug wire. Idle rpm read 4000 - 4100rpms with the ear muffs hooked up on the hose.
Reset tiny tach to 180 degrees which = 2 sparks per revolution. Wrapped once around both spark plug wires, per the technicians reccomendation at tiny tach. Idle reads 1860 -1900 rpms.
Still seems like a high reading for idle.
Any ideas or experience on how low should I set the tiny tach degree setting? 120 degree = 3 sparks per rev
90deg = 4 sparks per rev
60=6 sparks per rev
45 = 8 sparks per rev