... record working hours for testing engine R Speed with the Gasoline engine, ATV, Motorbike, Motorboat.2.Signal input 1. Signal input is a ... apparatus working hours, resolution of 0.1 hours.2. Display testing engine R-speed, error ± 5 r / min.3. Warning and flashing ... hours, flashing display 'LUBE' an hour.2. After working 100 hours, it has prompted to change gasoline, flashing display 'OIL' an hour ...