Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 20-06-2009, 09:09   #1
Registered User

Join Date: Jun 2009
Posts: 10
Urgent! Black Smoke, Low Revs?

Have 59Hhp Volvo Penta MD22P blowing black smoke and revs to only 1,800 rpm.
The hull is dirty, but it also happens while tied to the dock.
Any suggestions please?
__________________

__________________
sybobcat is offline   Reply With Quote
Old 20-06-2009, 09:14   #2
Moderator
 
cabo_sailor's Avatar

Cruisers Forum Supporter

Join Date: Mar 2008
Location: Tarpon Springs FL
Boat: Cabo Rico 38
Posts: 1,905
Sounds to me like your exhaust elbow may be plugged. If so you'll need to remove it and let it soak in a muriatic acid solution for a few hours to overnight. This is acid so take precautions with gloves and eyeware. Rinse thoroughly before use.

Rich
__________________

__________________
cabo_sailor is offline   Reply With Quote
Old 20-06-2009, 10:19   #3
Registered User

Join Date: Oct 2007
Location: virginia
Boat: islandpacket
Posts: 1,839
Clean your prop. if your hull is bad your prop is worse. it is also easy to suck up a rope or fishing line. But more than likely the prop is a mass of barnacles and slime. Do you get full RPM not in gear and then in gear low RPM and smoke? exhaust elbow also. Have you used this boat before? Is this a sudden change, or is this after sitting all winter and now just starting?
__________________
That derelict boat was another dream for somebody else, don't let it be your nightmare and a waste of your life.
Badsanta is offline   Reply With Quote
Old 20-06-2009, 11:02   #4
Registered User
 
Sailndive345's Avatar

Join Date: Jan 2009
Location: St Augustine, FL
Boat: Beneteau Oceanis 461
Posts: 349
While you are at it, you may want to see if anything is blocking the air intake to your engine....

Good luck!

Sailndive
__________________
Sailndive345 is offline   Reply With Quote
Old 20-06-2009, 17:08   #5
Registered User

Join Date: Jun 2009
Posts: 10
Thanks for all the suggestions so far. I’m going back to the boat today to try them. and will give an update soon. I’m trying to sell my boat and the buyer won’t settle until this is sorted. The main worry is that the problem exists when out of gear and not moving. Wouldn’t that seem to eliminate the dirty hull & prop?? I removed the air filter and got 3,000rpm and less smoke at the dock, but the problem returned when under way.
I then stopped the boat, and tried it again while out of gear, but the problem persisted.
In two days, I’m getting hauled out to clean the bottom. Any other comments please!!
__________________
sybobcat is offline   Reply With Quote
Old 20-06-2009, 17:20   #6
Registered User
 
Sailndive345's Avatar

Join Date: Jan 2009
Location: St Augustine, FL
Boat: Beneteau Oceanis 461
Posts: 349
It's interesting that removing the air filter made such a difference - even if temporary... Where does air enter the engine compartment? Do you have some sort of intake duct that is blocked/flattened by something? One way to eliminate this may be to run (if convenient and safe to do so) with the engine compartment open - see if the same behavior repeats itself....

Just a thought - good luck solving the puzzle!

Sailndive
__________________
Sailndive345 is offline   Reply With Quote
Old 20-06-2009, 20:41   #7
Registered User
 
moonrsn's Avatar

Join Date: Jul 2008
Location: Puget Sound
Boat: Islander 37 'Taku Wind'
Posts: 44
Did you check to make sure fuel fittings and priming screws are tight? I had this happen to me while test running a Volvo in my garage. I tightened up the bleed screw and it worked fine.
__________________
Noel Edwards
Faster horses, younger women, Older whiskey, and more money...
moonrsn is offline   Reply With Quote
Old 25-06-2009, 07:08   #8
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,586
Images: 240
See also a very old discussion “The Smoking Gun “
Interpreting Diesel Exhaust Smoke:
The Smoking Gun
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 25-06-2009, 07:19   #9
Registered User
 
Fishman_Tx's Avatar

Join Date: Apr 2009
Location: Beeville, Tx.
Boat: 1969 Morgan 40 Cruising Ketch "Lady Catherine II", 1973 Bristol 34 - "Our Baby"(RIP), Catalina 22
Posts: 876
Images: 12
Possibly too much fuel, too little air, or a crappy glow plug. Not all the fuel is getting burnt. Slow to catch during start?
__________________
Fishman_Tx is offline   Reply With Quote
Old 25-06-2009, 08:00   #10
Registered User

Join Date: Jun 2009
Posts: 10
Thanks to all. With what we now have in hand , I think we can fix the problem.

Cheers....sybobcat
__________________
sybobcat is offline   Reply With Quote
Old 25-06-2009, 08:52   #11
Registered User

Join Date: Oct 2007
Location: virginia
Boat: islandpacket
Posts: 1,839
Please post what you find. Thanks
__________________
That derelict boat was another dream for somebody else, don't let it be your nightmare and a waste of your life.
Badsanta is offline   Reply With Quote
Old 25-06-2009, 08:57   #12
Registered User

Join Date: Jun 2009
Posts: 10
okay...good idea...I'll post what we find in a couple of days....thanks
__________________
sybobcat is offline   Reply With Quote
Old 27-06-2009, 17:11   #13
Registered User

Join Date: Jun 2009
Posts: 10
A marine engineer elminated the black smoke by running the engine for 4 hours at 2,000 rpm while tied to the dock. He says that, due to the engine not being used for several months, rings were probably stuck inside pistons which were freed up with the high rev running. He also adjusted the 'advance/retard' setting of the fuel injector pump. Thanks again to everyone for your input.
__________________

__________________
sybobcat 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
This Can't Be Good.... Black Smoke & Soot markpj23 Engines and Propulsion Systems 20 21-04-2017 05:45
M12 black smoke under load bmiller Engines and Propulsion Systems 27 06-08-2012 16:43
Black Smoke Yanmar 2GM20 jmdezzutto Engines and Propulsion Systems 37 28-10-2011 15:01
Fouled Injectors > Low RPM & Smoke? Northeaster Engines and Propulsion Systems 30 11-05-2009 15:26
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 21:45.


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.