Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 01-06-2015, 19:29   #1
Senior Cruiser
 
Jim Cate's Avatar

Cruisers Forum Supporter

Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 12,158
Troubleshooting a CD ignition system

We have a Johnson 3.5 two stroke for a spare dinghy motor. Nasty little thing -- noisy, vibrates like hell, uses too much fuel, etc, but it was reliable for many years. Then one day it refused to start. investigation shows zero spark. Did the usual checks, and was left with the thought that either the coil or the CD unit itself has died. Don't have any friends with similar motors to swap parts with, dpn't want to start buying bits at random. It's a bit embarrassing to admit but I don't know how to effectively determine which part is at fault, so I would appreciate any wisdom from the crowd.

Thanks,

Jim
__________________

__________________
Jim and Ann s/v Insatiable II , lying Twofold Bay, Eden,NSW after our 32d crossing of Bass Strait!
Jim Cate is offline   Reply With Quote
Old 01-06-2015, 20:06   #2
Bailing as fast as I can.
 
GILow's Avatar

Join Date: Sep 2008
Location: Adelaide, South Australia
Boat: Swanson 42
Posts: 3,614
Re: Troubleshooting a CD ignition system

Which year Jim?


Sent from my iPhone using Cruisers Sailing Forum
__________________

__________________
Very funny Scotty, now beam down my clothes.
http://www.swansonsailor.id.au
GILow is offline   Reply With Quote
Old 01-06-2015, 20:14   #3
Registered User

Join Date: Feb 2013
Location: Lago de Izabal, Guatemala
Boat: Seafarer36c
Posts: 4,373
Re: Troubleshooting a CD ignition system

There is certainly no wisdom in this suggestion but lick your fingers and hold on to the wires going TO the coil. It really won't be that bad if the cd unit is puting out, trust me.
Ecos is offline   Reply With Quote
Old 01-06-2015, 20:39   #4
Registered User
 
Stu Jackson's Avatar

Join Date: Jan 2011
Location: Cowichan Bay, BC (Maple Bay Marina)
Posts: 6,602
Re: Troubleshooting a CD ignition system

Jim,

Does it have a kill switch on the throttle? I had one with the same symptoms (Evinrude 1990 9.9 hp) and that was the culprit.
__________________
Stu Jackson
Catalina 34 #224 (1986) C34IA Secretary
Cowichan Bay, BC, (Maple Bay Marina) SR/FK, M25, Rocna 10 (22#) (NZ model)
Stu Jackson is offline   Reply With Quote
Old 01-06-2015, 20:43   #5
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,949
Re: Troubleshooting a CD ignition system

I hope this will help.
http://www.google.ca/url?sa=t&rct=j&...94455598,d.aWw
__________________
The Blue Dot Campaign. This Changes Everything.
DeepFrz is offline   Reply With Quote
Old 01-06-2015, 21:46   #6
Registered User
 
travellerw's Avatar

Join Date: Jan 2014
Location: Bequia, SVG
Boat: Fortuna Island Spirit 40
Posts: 1,948
Re: Troubleshooting a CD ignition system

Quote:
Originally Posted by DeepFrz View Post
Yup the link DeepFrz posted has it right. Use a multimeter to check the ohms on the coils.

Unfortunately no real way to test the CDI without an expensive machine. You basically rule everything else out, then replace the CDI as the last step.
__________________

travellerw is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Troubleshooting my Marine Air AC System wcukajeff Construction, Maintenance & Refit 0 08-07-2013 11:53
Atomic 4 Ignition Parts Chief Engineer Engines and Propulsion Systems 0 19-06-2010 20:17
Ignition Key Turns All-the-Way 'Round Joe500 Engines and Propulsion Systems 7 25-07-2009 12:08
Need Ignition Wiring Lesson scott Engines and Propulsion Systems 8 20-05-2009 08:58
Piezo Ignition DWT Product or Service Reviews & Evaluations 4 18-06-2007 17:00



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 00:32.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.