Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 31-05-2014, 07:12   #1
Registered User

Join Date: Mar 2009
Location: Mandurah Western Australia
Boat: 09 Hunter 36
Posts: 6
Yanmar 3ym30 excessive black smoke

Replaced fuel filters, air cleaner good, fuel appears clean, motor starts easily, approx 250 hours on motor, good water flow out exhaust.
Motor blows out heavy black smoke and puts heavy black soot out onto water
Looking for experienced suggestions what to do injectors , coolant elbow?
Ideas thoughts appreciated.
Searched previous forums no clear direction.
__________________

__________________
Graeme Colmer is offline   Reply With Quote
Old 31-05-2014, 07:33   #2
Registered User
 
Jentine's Avatar

Join Date: May 2004
Location: Cruising on the hook
Boat: Beneteau 393, "Blackthorn"
Posts: 744
Images: 5
Re: Yanmar 3ym30 excessive black smoke

Diesel engines are simple. They require metered fuel and wide open air for proper operation. If either of these factors are altered, the result is incomplete combustion which is black or white smoke. Check the air intake to ensure it is clear. If so, remove the injector nozzles and have them serviced. They can be rebuilt for a fraction of the cost of replacement.
There are other possible problems such as a failure of the injection pump and/or improper timing but they are less likely.
__________________

__________________
Jim

We are what we repeatedly do.
Excellence, therefore, is not an act but a habit."
--Aristotle
Jentine is offline   Reply With Quote
Old 31-05-2014, 08:22   #3
Registered User
 
Jon Neely's Avatar

Join Date: Aug 2009
Location: Cruising East bound to EU
Boat: Hans Christian 33
Posts: 283
Re: Yanmar 3ym30 excessive black smoke

Could be exhaust elbow being clogged. I have seen yanmars with under 100hrs do that, stock ones seem undersized on most models.

Sent from my SAMSUNG-SGH-I747 using Cruisers Sailing Forum mobile app
__________________
Watch Our Adventure on a HC33 at youtube.com/c/sailingvesselprism
Jon Neely is offline   Reply With Quote
Old 31-05-2014, 17:41   #4
Registered User

Join Date: Mar 2009
Location: Mandurah Western Australia
Boat: 09 Hunter 36
Posts: 6
Re: Yanmar 3ym30 excessive black smoke

Sincere thanks
You've given me a starting point
GC
__________________
Graeme Colmer is offline   Reply With Quote
Old 05-06-2014, 23:59   #5
Registered User

Join Date: Mar 2009
Location: Mandurah Western Australia
Boat: 09 Hunter 36
Posts: 6
Re: Yanmar 3ym30 excessive black smoke

Today pulled out the water exhaust mixer bend and found it very nearly blocked corrosion and carbon
Cleaned it out as best could reassembled and restored full revs no carbon no smoke beautiful however condition of bend is likely needs replacement in next 12 months and I was told bronze replacements can be obtained. Would anybody have any ideas where I may be able to obtain such? Appreciate any advice anyone might have
Thanks
__________________
Graeme Colmer is offline   Reply With Quote
Old 06-06-2014, 00:12   #6
Registered User
 
DubeJ's Avatar

Join Date: Apr 2013
Location: Carlsbad CA
Boat: 1984 Hunter 36ft sloop
Posts: 61
Re: Yanmar 3ym30 excessive black smoke

Hmm, I am getting white smoke (very little) from my yanmar. I am going to be taking the steps you did already GC, and hopefully all that everyone has suggested, at least take a look at as well. I will take pics and upload/share with all of my upcoming mistakes and probs! Haha
__________________
"Be courteous, be professional, and have a plan to kill everyone." Gen "Mad Dog" Mattis
DubeJ is offline   Reply With Quote
Old 06-06-2014, 01:23   #7
Marine Service Provider
 
boatpoker's Avatar

Join Date: Nov 2008
Location: Toronto, Ontario or Bahamas
Boat: Benford 38 Fantail Cruiser
Posts: 2,593
Re: Yanmar 3ym30 excessive black smoke

3YM30's had an issue with inadequate heat exchangers on engines with serial numbers between 00001 and 05565 although I think by 09' you'd be out of that range, still it's worth a check. See attached service bulletin ....
Attached Files
File Type: pdf Yanmar 3YM30.pdf (47.9 KB, 63 views)
__________________
That hysterical laughter you hear as you sail a way in your "new" boat ..... is the seller.
boatpoker is offline   Reply With Quote
Old 29-08-2014, 12:46   #8
Senior Cruiser
 
SkiprJohn's Avatar

Cruisers Forum Supporter

Join Date: May 2006
Location: Kea'au, Big Island, Hawaii
Boat: Cascade, Sloop, 42 - "Casual"
Posts: 14,192
Re: Yanmar 3ym30 excessive black smoke

Did you find the propulsion threads?
__________________
John
SkiprJohn is offline   Reply With Quote
Old 29-08-2014, 13:52   #9
Registered User

Join Date: Oct 2006
Location: Parry Sound Ontario
Boat: Irwin citation 40 "Southern Toy"
Posts: 169
Re: Yanmar 3ym30 excessive black smoke

the yanmar 3gm's heatriser is easily cleaned. Remove from boal. heat up with a torch,when good and hot hit with a big hammer all scales and soot will fall out Ole
__________________

__________________
olepedersen is offline   Reply With Quote
Reply

Tags
3ym30, yanmar

« Hiya! | Can't Sleep »
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
Smoke, Smoke, Smoke that Cigarette ! bangkaboat Health, Safety & Related Gear 149 20-06-2013 23:41
Yanmar 3ym30 big smoke at revs Al. Engines and Propulsion Systems 9 08-05-2012 19:23
Yanmar issues... white smoke and black oily soot (exhaust) and engine smoke CS27 Engines and Propulsion Systems 3 14-09-2008 18:40



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:53.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.