Reply
 
Thread Tools Search this Thread
 
Old 23 July 2017, 16:23   #1
Member
 
Country: UK - England
Town: bedford
Make: tornado
Length: 5m +
Engine: outboard 60hp merc
Join Date: Oct 2007
Posts: 210
Yamaha 115 kill switch

Hi, I have a 1994 Yamaha 2S V4 outboard that appears to have a starting problem that points to the Kill switch. Does anyone know, which wire effectively disables the kill switch on the switch box/CDI unit?

I am proposing to remove/unscrew or cut the wire and splice in a bullet connector into this wire, to check if it really is the kill switch causing the starting problem.

We have checked out the stator, switch box and trigger, so that only leaves the kill switch. Even this looks OK and when dismantled but maybe its some of the wiring.

I have a workshop manual but cant see the colour for this wiring.

Thanks for the help.

Dave
__________________

__________________
davej is offline   Reply With Quote
Old 23 July 2017, 17:07   #2
Member
 
Country: UK - England
Length: 3m +
Join Date: Sep 2008
Posts: 2,251
Have you tested it with a meter?
__________________

__________________
ShinyShoe is offline   Reply With Quote
Old 23 July 2017, 17:54   #3
Member
 
Country: UK - England
Town: southampton
Make: ribeye
Length: 6m +
Engine: 100
Join Date: Jul 2006
Posts: 194
Have you ruled out the 'in neutral' micro switch in the control box. The micro switch often gets stuck in making the controls thinking it's still in gear and wont start.
__________________
ribber is offline   Reply With Quote
Old 23 July 2017, 18:15   #4
Member
 
Country: UK - England
Town: bedford
Make: tornado
Length: 5m +
Engine: outboard 60hp merc
Join Date: Oct 2007
Posts: 210
[QUOTE=ribber;753810]Have you ruled out the 'in neutral' micro switch in the control box. The micro switch often gets stuck in making the controls thinking it's still in gear and wont start.

Great idea about the micro switch, will check that when I get home at the weekend.

The control box is only 3 yrs old but I guess in a salt water environment corrosion happens!

Dave
__________________
davej is offline   Reply With Quote
Old 23 July 2017, 20:28   #5
Member
 
Country: UK - England
Town: penzance
Boat name: not named
Make: ski boat
Length: 5m +
Engine: 150 HPDI
Join Date: Sep 2013
Posts: 124
From distant memory, I think it's white (but don't know at the CDI?)
Many years ago I isolated it because of a control box issue & it started fine. We then had this loose end kicking round it the boat, It was a bit lively. One chap was leaning over the edge, hands in water & had said wire placed somewhere around his nuts. He jumped. That was maybe 10 years ago. His revenge was executed only last week when he pushed me off the pontoon before I'd zipped up my drysuit.
__________________
simonl is offline   Reply With Quote
Old 24 July 2017, 04:27   #6
Member
 
Country: UK - England
Town: southampton
Make: ribeye
Length: 6m +
Engine: 100
Join Date: Jul 2006
Posts: 194
It wasn't so much corrosion, but grease that's lubricating all the ratchets etc. becomes hard and if its all over the micro switch stops it from popping back out. Then when the sun warms up the controller (and the grease) the fault doesn't happen....becoming an intermittent problem that was hard to diagnose.
__________________
ribber is offline   Reply With Quote
Old 24 July 2017, 04:37   #7
Member
 
Country: UK - England
Town: penzance
Boat name: not named
Make: ski boat
Length: 5m +
Engine: 150 HPDI
Join Date: Sep 2013
Posts: 124
Quote:
Originally Posted by ribber View Post
Have you ruled out the 'in neutral' micro switch in the control box. The micro switch often gets stuck in making the controls thinking it's still in gear and wont **start**.
Won't **crank***, rather than won't start.
Slightly pedantic, but I assumed this one's cranking...
__________________
simonl is offline   Reply With Quote
Old 24 July 2017, 13:00   #8
Member
 
Country: UK - England
Town: bedford
Make: tornado
Length: 5m +
Engine: outboard 60hp merc
Join Date: Oct 2007
Posts: 210
Ours cranks fine but wouldn't start, not all the time but intermittently.

We have looked at everything we could think of but will look again at the micro switch for the control lever.

Thank you.

David
__________________
davej is offline   Reply With Quote
Old 24 July 2017, 14:33   #9
Member
 
Country: UK - England
Town: southampton
Make: ribeye
Length: 6m +
Engine: 100
Join Date: Jul 2006
Posts: 194
As simonl points out, if the engine is 'cranking' then it's not the micro switch in the neutral position. It wont do anything when ignition turn on if micro switch is faulty. Sorry.
__________________
ribber is offline   Reply With Quote
Old 27 July 2017, 16:07   #10
Member
 
Country: UK - Scotland
Town: wormit
Boat name: lots of them
Make: various
Length: no boat
Engine: all types
Join Date: Dec 2004
Posts: 388
Its the white wire at CDI that stops the engine, try disconnecting that first.

Your fault is a perfect description of the engine not cranking fast enough. Get a mega battery on it first. Take off the air box and make sure the choke butterflies are shutting properly. They are half spring loaded and stick. Squirting a small amount of fuel into the carbs will rule out this theory.
__________________

__________________
Davie is offline   Reply With Quote
Reply

Tags
yamaha

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 10:22.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.