Join Date: Jul 2003
Location: On the boat cruising
Thanked 103 Times in 98 Posts
Rep Power: 16
Re: Missing RPMs
I'm interested in what you find out is the issue. Do you get appropriate readings up to a certain rpm, then they diverge? Or does yours consistently read 60% low across the board?
We also have a similar issue with one of our tachs. It reads correctly up to ~1400rpm, then increases slowly until it maxes at 2000rpm.
We are lucky for troubleshooting to have twin engines, so I have switched the sensors (no change), and switched the tachs - the problem followed the tach to the other engine. So must be a bad tach - but both tachs are almost new, having been installed in the past year.
I'm hoping you find some setting issue, or other simple thing that will keep me from having to buy a new tach.
Manta 40 Catamaran "Reach"
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