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Old 07-12-2019, 10:52 AM   #1
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Heritage East Help

Hi I have a heritage east sundeck 40 with Perkins engines. Am I right in saying the rev counter come from the alternator or is it off the gearbox. The problem I have it the Rev counter on the starboard engine doesn’t work. I have tried a new gauge as I had one but still nothing.
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Old 07-12-2019, 11:33 AM   #2
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Not a direct answer, but if you have a working gauge, swap the gauges around. You can test all of the gauges and the signal.


If the alternator senses no load and sees no reason to make power, it might not register. Might use a jumper to put a load on the alternator.
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Old 07-12-2019, 07:25 PM   #3
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It comes off the alternator. Will always give a reading, draw or not.

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Old 07-12-2019, 11:03 PM   #4
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Tachometer replacement for Perkins 4-236 - Cruisers & Sailing Forums


Here is a link to a thread where people reported tachs not working until a load made the alternator charge. Is that the problem? Don't know.


Here is another thread:


http://www.cruisersforum.com/forums/...lem-65857.html
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