Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 14-10-2013, 14:50   #1
Registered User

Join Date: Jun 2013
Posts: 3
YANMAR 3JH4E, 4JH4AE, oily? soot? in engine bay?

I've recently been looking to buy a Beneteau equiped with either a YANMAR 3JH4E or 4JH4AE engine - Oceanis 40 or 43.

I have noticed that a quite a few of the boats I've looked at have oily? black soot in the engine bay - Sometimes it's pretty obvious other times not at all but it seems to be in about half of the boats I have looked at - mostly very well maintained boats

I'm wondering if anyone can identify if it's a big problem the owner is trying to hide? or what it could be? where it's coming from? In the photos It's obvious on the back of the impeller case and on the orange tube.

Thanks for any input.



__________________

__________________
dial_amonkey is offline   Reply With Quote
Old 14-10-2013, 15:05   #2
Moderator
 
noelex 77's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: Living on dirt waiting for our new yacht to be built.
Boat: Half built Bestevaer.
Posts: 10,619
Re: YANMAR 3JH4E, 4JH4AE, oily? soot? in engine bay?

Welcome to the forum.

Your photos are not working, but it sounds like belt dust which is not a problem.

For the photos try these steps:
- Use 'Post reply' (just under the last post) rather than 'Quick reply'
- Scroll down and click on 'Manage attachments'
- Click on 'Choose File' and select your image
- Click on 'Upload' to the right of this
- When it has uploaded click on 'Close this window' at the top right, or at the very bottom of the page
- The image should now be attached at the bottom of your post (you can click on 'Preview Post' if you want to view it).

If you are still having problems attaching the photos send me a Private message and I will talk you through it.
__________________

__________________
noelex 77 is offline   Reply With Quote
Old 14-10-2013, 15:16   #3
Moderator
 
noelex 77's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: Living on dirt waiting for our new yacht to be built.
Boat: Half built Bestevaer.
Posts: 10,619
Re: YANMAR 3JH4E, 4JH4AE, oily? soot? in engine bay?

I fixed one of the photos from the raw data in your post and yes that is just dust from the alternator belt.
Clean off the dust and check the belt tension. 10 min job. The worst it will mean is replacing the belt if its which is a standard service item anyway.
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	128
Size:	201.0 KB
ID:	68680  
__________________
noelex 77 is offline   Reply With Quote
Old 14-10-2013, 16:46   #4
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Re: YANMAR 3JH4E, 4JH4AE, oily? soot? in engine bay?

It could also mean that the sheaves are out of alignment a tad.
__________________
The Blue Dot Campaign. This Changes Everything.
DeepFrz is offline   Reply With Quote
Old 14-10-2013, 19:44   #5
Marine Service Provider

Join Date: Feb 2013
Location: SAMOS ISLAND GREECE
Boat: JEANNEAU,BENETAU,BAVARIA etc.
Posts: 148
Re: YANMAR 3JH4E, 4JH4AE, oily? soot? in engine bay?

Quote:
Originally Posted by dial_amonkey View Post
I've recently been looking to buy a Beneteau equiped with either a YANMAR 3JH4E or 4JH4AE engine - Oceanis 40 or 43.

I have noticed that a quite a few of the boats I've looked at have oily? black soot in the engine bay - Sometimes it's pretty obvious other times not at all but it seems to be in about half of the boats I have looked at - mostly very well maintained boats

I'm wondering if anyone can identify if it's a big problem the owner is trying to hide? or what it could be? where it's coming from? In the photos It's obvious on the back of the impeller case and on the orange tube.

Thanks for any input.




hi dial_amonkey
can you tell me how old is the engine?
you possibly need to change the exhaust mixing elbow , i changed one in an oceanis 2008 that was corroded-leaking and the aft port fexible engine mount was rusted alot.the engine was a 4jh4AE yanmar

M.E
__________________
MARINE ENGINNER is offline   Reply With Quote
Old 14-10-2013, 22:04   #6
Registered User

Join Date: Jun 2013
Posts: 3
Re: YANMAR 3JH4E, 4JH4AE, oily? soot? in engine bay?

OK thanks all for all the input - great advice - when I'm back at the boat I'll check the the belt tension/wear/alignment and exhaust elbow.

The engine is 5 years old but and in excellent condition - no corrosion anywhere

(Will try now to add pics to the post)
Attached Thumbnails
Click image for larger version

Name:	forum-1.jpg
Views:	86
Size:	409.1 KB
ID:	68696   Click image for larger version

Name:	forum-2.jpg
Views:	115
Size:	356.4 KB
ID:	68697  

__________________

__________________
dial_amonkey is offline   Reply With Quote
Reply

Tags
engine, oil, yanmar

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




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 05:56.


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.