The instrumentation kit will upgrade your older Williams tender to the 2014 & newer tender gauge configuration. The kit is sold with tachometer, speedometer, fuel gauge, wire harness adapter and GPS receiver. A matching volt meter is also available; https://www.weberpower.com/electrical-voltmeter.html
These gauges can be adapted for use with any Weber MPE-750 or Textron MPE-850 engine application.
||Williams Instrumentation Upgrade