Notices
Marine Electronics Forum

key switch problem?

Old 09-02-2011, 04:10 PM
  #1  
Junior Member
Thread Starter
 
Join Date: Sep 2011
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
Default key switch problem?

i have a yamaha 150 outboard carb about 12 years old,lately when it has not been used for a while and i go to start it up,the key alarm will come on but further turning does not crank the engine.if i play with it a little it will start evntually.then after runnnig awhile i have no problem with it starting again.could this be a switch going bad,or some corrosion internally,would a squirt of wd-40 help.any advice appreciated.
john
Old 09-02-2011, 09:25 PM
  #2  
Senior MemberCaptains Club Member
 
Join Date: Feb 2003
Location: M.Vineyard, MA
Posts: 16,454
Received 996 Likes on 770 Posts
Default

What is the voltage at the battery and dash?

Check the key switch connections at the S terminal. If tight and with NO corrosion, try jumping from the B terninal to the S terminal. If it cranks you probably need to replace the switch . But first pull the ign. switch and with a VOM ohmmeter setting and all other wires carefully labeled & removed, test for consistant continuity between the B battery + terminal on the switch and the S solenoid terminal in the Start position. If there is consistent near 0 resistance , the problem is likely elsewhere.

If your battery is still good(can pass a load test) & well-charged with proper electrolyte levels , you could try jumping momentarily from Battery + to the starter solenoid big +terminal to see if it turns , and from battery - to the engine block ground connection.

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.