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    • Cummins Marine Forum Topics
    • Tach issue

      This topic has 2 replies, has 2 voices, and was last updated byRob Schepis 5 years ago

      February 20, 2019 at 3:47 pm 6BTA 315 Nippon Denso with VDO Tiara supplied gauges in a 1995 Tiara. One tach doesnā€™t work at all until engine revved above 2000rpm. Works fine at low rpm after being revved up. Swapped tachs around to confirm the issue isnā€™t in the tach itself. Swapped bell housing senders between engines with no change and triple checked that sender depth is correct/ as close to ring gear as possible. Checked induced AC voltage OK at sender. Same on both side…

      Started by: Mike Loveday in: Instrumentation & Electronics

      2 Replies
      February 21, 2019 at 8:51 am You’ve been diligent and thorough. Maybe it’s time to run a dedicated feeds from the sensor to the tach and 12V too. You can loose run it all for testing purposes.

      Last Post by: Rob Schepis posted: 5 years ago

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