Read Paper. Yamaha Multifunction Gauge Kit Installation The Yamaha Multifunction tachometer works on 1994 and later 40-300hp and F25-F250 four stroke motors and will install in standard 3 3/8 diameter gauge hole in dash. The tachometer provides RPM reading, trim angle indicator, engine operating hours, overheat and oil warning indicators. Related searches for yamaha digital gauge wiring diagram yamaha trim gauge wiring diagramyamaha fuel management gauge wiringyamaha gauge wiring schematicyamaha multifunction gauge kit installationyamaha digital tachometer wiring diagramyamaha multi function digital gaugeyamaha outboard gauges wiring diagramyamaha multifunction tachometer wiring