Tartan 27' owner
Join Date: Jan 2008
Thanked 107 Times in 99 Posts
Rep Power: 8
Re: Catalina 27 RPMs drop to zero
Look for a wire coming off your alternator that runs to the tachometer.
This wire is likely not very well connected - electrically or mechanically.
The alternator provides the engine rpm information to the guage.
Have seen this before on a friends universal diesel.
When the wire is disconnected the tach seems dead. Could also be a short along that wire.
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