Thread Tools Search this Thread Display Modes
Old 06-07-2012, 09:07 AM   #1
ARoss's Avatar
City: Chocowinity NC
Vessel Name: My Yuki
Vessel Model: 1973 Marine Trader 34
Join Date: Nov 2007
Posts: 634
Wacky Tach

We were running back from Ocracoke the other day, cruising @ about 7 kts, 1950 rpm, when without any change in the throttle or engine pitch the tach on the upper helm jumped up to ~2400 rpm, and stayed there. A quick check of the lower helm show it was still reading 1950-2000 rpm.

Any ideas where I might start looking for a reason this might have happened?

FL 120, single.

ARoss is offline   Reply With Quote
Old 06-07-2012, 09:18 AM   #2
skipperdude's Avatar
City: Whittier AK
Country: USA
Vessel Name: Apache II
Vessel Model: 1974 Donald Jones
Join Date: Oct 2007
Posts: 3,147
I would first check the connections.
Is it the same sender for both tacs?
Is the tac run off the alternator or engine?


If you can't repair it maybe it shouldn't be on the boat
skipperdude is offline   Reply With Quote
Old 06-07-2012, 02:23 PM   #3
ben2go's Avatar
City: Upstate,SC
Country: USA
Vessel Name: Dutch Barge Caroliner
Vessel Model: Selway-Fisher 45' Teign Luxe Motor
Join Date: May 2012
Posts: 2,696
Yep.We need to know what drives the tach.Then we can get down to diagnostics.
ben2go is offline   Reply With Quote

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 06:35 AM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012