Reply
 
Thread Tools Display Modes
 
Old 07-10-2012, 03:00 PM   #1
Veteran Member
 
DonnyP's Avatar
 
City: Newburyport, MA
Country: USA
Vessel Name: Kairos
Vessel Model: Hunt Express 36
Join Date: Feb 2012
Posts: 55
Engine gauges

Looking for some help chasing down some engine gauge gremlins. I have twin Ford Lehman 120HPs on my Cheer Men PT 41 trawler. I have attached two pictures one at the lower helm (both RPMs ~900) and one at the upper (port RPM~900, Stbd 150).

Lower Helm:
RPMs seem accurate
Amps seem accurate
Water Temp usually read about 185deg on both
Oil Press reads ~58 port and pegs to the far right on stbd

Upper Helm:
Port RPM seems accurate and consistent with lower, stbd does not move.
Amps seem accurate
Water Temp on port seems accurate, stbd pegs to far right
Oil Press reads ~58 port and pegs to the far left on stbd (opposite the lower helm)

Any suggestions on where to start looking? Do the terminals on the actual gauges need cleaning/sanding? Where on the engine would I be looking? Let me know if I missed anything. Thanks in advance!

-Donny
Attached Thumbnails
Click image for larger version

Name:	Lower helm.jpg
Views:	64
Size:	122.5 KB
ID:	11892   Click image for larger version

Name:	Upper Helm.jpg
Views:	65
Size:	149.5 KB
ID:	11893  
__________________
Advertisement

DonnyP is offline   Reply With Quote
Old 07-10-2012, 03:15 PM   #2
Guru
 
Capn Chuck's Avatar
 
Join Date: Jan 2009
Posts: 899
Donny, You need to check each connections to be sure nothing is loose and look for corrosion. I would recommend that all gauges have a separate ground wire leading to a common buss. You need to look at the connections on both ends. This does appear to be a ground problem. Chuck
__________________

__________________
Blogs
Beach House
Sea Trek
Capn Chuck is offline   Reply With Quote
Old 07-10-2012, 05:25 PM   #3
TF Site Team
 
FlyWright's Avatar
 
City: California Delta and SF Bay
Country: Sacramento, CA, USA (boat in Vallejo)
Vessel Name: FlyWright
Vessel Model: Marshall Californian 34 LRC
Join Date: Apr 2008
Posts: 10,178
Can you easily swap gages to see if the problem follows the gage?
FlyWright is offline   Reply With Quote
Old 07-10-2012, 05:46 PM   #4
Veteran Member
 
DonnyP's Avatar
 
City: Newburyport, MA
Country: USA
Vessel Name: Kairos
Vessel Model: Hunt Express 36
Join Date: Feb 2012
Posts: 55
FlyWright,
I might be able to try that when I take things apart to clean all of the connections as Chuck suggested. Thanks!

-Donny
DonnyP is offline   Reply With Quote
Reply

Thread Tools
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 01:35 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012