Hall effect switch at the flywheel sounds to be working. You might use an o-scope to verify clean and consistent square wave.
Tach is a pulse counter and integrator. It will need power (+12v and GND) and a pulse. Verify pulse is making it there at the same amplitude as at the flywheel. Verify power. Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On Thu, Oct 31, 2019, 5:53 PM sv Rebecca Leah via CnC-List < [email protected]> wrote: > Does anyone know anything about Yanmar 4JHE tachs? Rewired my engine, now > tach fails to work. Tried new tach no help. > Pickup off flywheel shows an ac voltage that increases with rpm. > Tacoma desiel had me check cleanliness of pickup. No dirt. > At a loss. I need help. > > > Doug Mountjoy > Sv Rebecca Leah > C&C LF39 > 253-208-1412 > Port Orchard YC wa. > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
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