Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-29-2017, 03:21 PM   #1
Guru
 
catalinajack's Avatar
 
City: Edgewater, MD
Country: USA
Vessel Name: Catalina Jack
Vessel Model: Defever 44
Join Date: Nov 2011
Posts: 791
Tachometer Bliss - ByeBye Stewart Warner

Our Defever had the standard, ubiquitous Stewart Warner tachs driven by the alternators. And, of course, they sometimes operated intermittently, a problem that frequently arises on this forum. And even when operative, attaining accuracy by trying to adjust the potentiometer is very difficult if not impossible.

I recently replaced all four of the SW's with "modern" programmable units. The lower helm got VDO's with hour meter and the upper helm got IssPro's. I used the existing wiring taking the signal from the Balmar alternators. Guess what. They work, with no drop-outs. And they are extremely accurate. At 1,650 RPM indicated (by my eye), my optical revolution reader showed 1,644 RPM. My guess as to why the tachs are not dropping out is that the Balmars being controlled by three-stage regulators are always putting out some current even in float stage and that minimal current is all that these new tachs require to operate.

So, for those who are being driven crazy by those old Stewart Warners, you may want to take a chance on a VDO or IssPro. Of course, if your vessel is equipped with a signal generator you are home free. All you will need to know is how many pulses per revolution your pulse generator produces.
__________________
Advertisement

catalinajack is offline   Reply With Quote
Old 05-30-2017, 07:22 AM   #2
Guru
 
ranger42c's Avatar
 
City: Maryland
Country: USA
Vessel Model: 42' Sportfish
Join Date: Aug 2013
Posts: 4,432
FWIW, we replaced our original Faria tachs with Aetna digital tachs. Magnetic sender on the flywheel. Tooth count, easy set-up.

-Chris
__________________
South River, Chesapeake Bay
ranger42c is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 05:44 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012