Notices
Marine Electronics Forum

Yamaha Fuel Gauge pegged to "F"

Old 08-26-2018, 07:17 PM
  #1  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Nov 2014
Location: Venice, La
Posts: 228
Likes: 0
Received 34 Likes on 12 Posts
Default Yamaha Fuel Gauge pegged to "F"

As the description says, I have a 2002 Yamaha Fuel Gauge (2 stroke) pegged on "f" when the key switch is turned on.. Attached on the other end is a 1 year old WEMA sending unit. How do I trouble shoot to find out what is going on.. I know the tank is empty..
Any assistance would be greatly appreciated.
Old 08-27-2018, 12:41 AM
  #2  
Senior MemberCaptains Club Member
 
Join Date: Feb 2003
Location: M.Vineyard, MA
Posts: 16,260
Received 949 Likes on 734 Posts
Default

See if the gauge will drop to empty if you disconnect the sender wire. If not, -bad gauge.
If it does drop to empty, see if the gauge sender wire is attached to a ground at the tank. WEMA reverses the nearly universally-accepted ABYC wiring color coding almost every other manufacturer uses.

( ABYC says gauge to tank sender should be pink , and sender to neg ground should be black. WEMA says gauge to sender is black at the sender and sender to neg ground is pink or white, I believe. WEMA says you can reverse them if you want, but you have to make sure you are not connecting the gauge sender wire to ground. )

Check the resistance between the 2 sender wires ( disconnected ) , Empty should read ~~ 240 ohms and Full ~~ 33 ohms if it is an American standard resistance range sender. .


You could also disconnect the sender wire at both ends and insulate one end and use a test light or continuity buzzer to apply 12v + to the other end . If it indicates continuity, the sender wire may be chafed or broken and grounding out on the engine (I/B or I/O) block or tank.

If the gauge is USA standard and the sender is Euro , or vice versa, the gauge indicator movement will be reversed. Gauge and sender must be the same ohms resistance standard to read correctly.

IS0085d.pdf ( generic sender/ gauge resistance values)

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 On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.