Water temperature gauge (100° 240° f) installation instructions 90 825303005 september 2005 page 3 7. b. if using a separate light switch for instrument lighting, connect the lamp terminal to a 12 volt positive ( ) switched source. 2. connect tan wire to "s" terminal of temperature gauge. tan. A secondary station 1 stop start panel 2 tachometer 3 oil pressure 4 water temperature 5 battery meter b primary station 1 ignition switch 2 tachometer 3 oil pressure 4 water temperature 5 battery meter 6 to engine 7 20 ampere fuse. 4d 10 wiring diagrams 90 806535 893.
Hook up a meter between the temp sender stud and ground, set the meter to ohms scale and start the motor. as it warms up the resistance in ohms should increase. if it does, then connect the meter to the gauge signal connection and the other lead to ground and see if the resistance increases as the motor warms up. May 21, 2024. engine instrument wiring doesn't need to be complicated. the vast majority of recreational boats in service today are still using analogue instrumentation systems. more modern digital, nmea networked, and multifunction gauges may be all the buzz, but the reality is that most boats are still equipped with the same analogue set ups. If you own a mercruiser engine or are planning to install one, understanding the wiring diagram is essential. the electrical system of a mercruiser engine plays a crucial role in its operation and performance. it connects various components, such as the alternator, ignition system, starter, and gauges, ensuring their proper functioning. The 4.3 mercruiser engine is a popular choice for many boat owners due to its reliable performance and excellent power output. it is a v6 engine with a displacement of 4.3 liters, delivering a maximum horsepower of 220. one of the notable features of the 4.3 mercruiser engine is its fuel efficiency.
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