Go Back  Offshoreonly.com > Technical > General Q & A
Eratic Gauges >

Eratic Gauges

Notices

Eratic Gauges

Thread Tools
 
Old 04-28-2008, 10:21 PM
  #1  
"Unregistered Gun"
Platinum Member
Thread Starter
 
Jim Diesel's Avatar
 
Join Date: Dec 2005
Location: Paducah, Ky
Posts: 1,346
Received 74 Likes on 38 Posts
Default Eratic Gauges

I have had my boat out twice since I bought it in February , when I first took it out I noticed that both tachs fluctuated 500 rpm when running and both gas gauges did to. I took it out weekend before last and done the same thing this time the starboard tach was reading 500 rpm higher and it was still bouncing like the port along with the gas gauges. I do have one battery not holding a charge but that shouldnt effect both tachs since they are isolated power wise from each other. Any thoughts, common ground maybe?
Jim Diesel is offline  
Old 04-28-2008, 10:34 PM
  #2  
Charter Member #34
Charter Member
 
Dock Holiday's Avatar
 
Join Date: Oct 2000
Location: Beautiful North Carolina
Posts: 7,151
Likes: 0
Received 1 Like on 1 Post
Default

Ground

Bad plug wires
Dock Holiday is offline  
Old 04-28-2008, 10:48 PM
  #3  
"Unregistered Gun"
Platinum Member
Thread Starter
 
Jim Diesel's Avatar
 
Join Date: Dec 2005
Location: Paducah, Ky
Posts: 1,346
Received 74 Likes on 38 Posts
Default

Wouldn't bad plug wires cause the engine to miss? When it does this both engines sound in synch with one another and no sign of miss fire?
Jim Diesel is offline  
Old 04-28-2008, 11:39 PM
  #4  
Charter Member # 55
Charter Member
 
Griff's Avatar
 
Join Date: Oct 2000
Location: Omaha/LOTO
Posts: 19,557
Received 1,821 Likes on 907 Posts
Default

You've most likely got a ground short. Check the grounds at the fuel tank sending unit.
Griff is online now  
Old 04-29-2008, 07:42 AM
  #5  
Charter Member #34
Charter Member
 
Dock Holiday's Avatar
 
Join Date: Oct 2000
Location: Beautiful North Carolina
Posts: 7,151
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by Jim Diesel
Wouldn't bad plug wires cause the engine to miss? When it does this both engines sound in synch with one another and no sign of miss fire?
No you do not have to have a miss. A good friend with a 25 Eliminator fought this problem for days and finally changed the plug wires and it went away instantly. He told me about it when I had a similar problema nd I changed the wires and all was good and I did not have a miss at all. Sorry I do not know why or how to explain it. Just a suggestion based on experience.
Dock Holiday is offline  
Old 04-29-2008, 08:24 AM
  #6  
Registered
 
Join Date: Feb 2004
Location: MT. JULIET, TN.
Posts: 3,710
Received 2 Likes on 1 Post
Default

Did those erotic gauges cost extra??? Just kidding, the battery will cause some crazy sh*t. Replace that before you go looking for trouble.
kennyo is offline  
Old 04-29-2008, 08:29 AM
  #7  
Registered
 
Fountain38SC's Avatar
 
Join Date: Jan 2002
Location: Cincinnati, Oh
Posts: 1,145
Likes: 0
Received 0 Likes on 0 Posts
Default

Ditto start with the battery, check the grounds and then go for the plug wires.
Fountain38SC is offline  
Old 04-29-2008, 01:17 PM
  #8  
"Unregistered Gun"
Platinum Member
Thread Starter
 
Jim Diesel's Avatar
 
Join Date: Dec 2005
Location: Paducah, Ky
Posts: 1,346
Received 74 Likes on 38 Posts
Default

Originally Posted by Griff
You've most likely got a ground short
Could you explain this, cuz if it was shorted to a positive leg it would blow a fuse or heat up and burn the insulation.

Kenny, bite me but I did get two new battery's today and will try it out this weekend.

Doc, thanks im going to try this using a set of known good wires.

Last edited by Jim Diesel; 04-29-2008 at 01:23 PM.
Jim Diesel is offline  
Old 04-29-2008, 03:02 PM
  #9  
Registered
 
trips2win's Avatar
 
Join Date: Aug 2006
Location: LOTO
Posts: 179
Likes: 0
Received 0 Likes on 0 Posts
Default

I have been chasing the same problem for a couple of seasons checked all grounds cleaned everything i could see finally sent all gauges to livorsi this winter they rebuilt several of them i hope this fixes if not i will try plug wires
trips2win is offline  
Old 04-29-2008, 09:32 PM
  #10  
JB Marshall
Gold Member
 
J.B. Marshall's Avatar
 
Join Date: Mar 2006
Location: Hudson Valley, NY
Posts: 940
Likes: 0
Received 0 Likes on 0 Posts
Default

Hey Trips I have had the same problem the last two seasons at or around 3500-4000 rpm's. Please let me know if you have corrected your problem with re-worked gauges.
Thanks,
JB
J.B. Marshall is offline  


Quick Reply: Eratic Gauges


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.