Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 29-04-2011, 20:29   #31
ATC
Marine Service Provider

Join Date: Feb 2011
Location: St Petersburg, FL
Boat: Thompson Trawler, SUITE 44
Posts: 73
Re: Black Smoke Yanmar 2GM20

Check to see if when you start the engine, do you get a slick/film on the water. If so the mixing elbow is restricting the exhaust causing unburnt fuel and a loss of power.
__________________

__________________
Absolute,

"Suckin Sludge & Havin a Gas"
ATC is offline   Reply With Quote
Old 18-07-2011, 15:07   #32
Registered User

Join Date: Jul 2010
Location: Wisconsin and Fort Myers FL
Boat: S2 9.2, 30' - Big Bite
Posts: 1
Re: Black Smoke Yanmar 2GM20

I have a similar problem...a Yanmar 2GM20....which starts, runs up to 2,000 rpm and then idles up and down and when under load, goes down to zero/quits.

I have had fuel problems. I can't seem to get the fuel line out to take off the line filter in the tank (tank top has limited access to withdraw the top to get at the inlet strainer.

I have read where it might be a timing problem, might be injectors problem and might be restricted fuel line problems (inlet strainer). Fuel filters were cleaned/cleared.

Help...should I just call a mechanic and be done with it?
__________________

__________________
Skippie is offline   Reply With Quote
Old 19-07-2011, 05:45   #33
Registered User
 
Dkdoyle's Avatar

Join Date: Dec 2010
Location: Ruskin, Fl
Boat: Seafarer 26
Posts: 287
Interesting info. I have been having the black smoke symtoms for about a momth or so and just lost power at high end. Luckily my husband is a deisel mechanic and has started down the process. Prop being checked this week, Injector tested, going to look at elbow next. Mines only a one cylinder sio there is just not much too it. If you have ever had a potato plug your exhaust pipe in your car it it the same thing, back pressure. Will let you know.
__________________
Dkdoyle is offline   Reply With Quote
Old 19-07-2011, 14:54   #34
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Re: Black Smoke Yanmar 2GM20

Skippie, when you do get that strainer off the pickup tube, walk it over to the nearest dumpster and say bye, bye. Or save it in a scrap book or something, but don't put it back in your tank.
__________________
DeepFrz is offline   Reply With Quote
Old 19-07-2011, 15:04   #35
Registered User

Join Date: Jun 2011
Location: Pelham N.H.
Boat: contessa 26
Posts: 14
Re: Black Smoke Yanmar 2GM20

I would check air filter first 9 out of 10 that is the problem
__________________
Howard Augenste is offline   Reply With Quote
Old 24-07-2011, 17:54   #36
Registered User
 
Dkdoyle's Avatar

Join Date: Dec 2010
Location: Ruskin, Fl
Boat: Seafarer 26
Posts: 287
Well after much investigation and taking off the elbow (clean), the injector tested (works correctly), throttle cable, air filter, etc. I called my diver who does my boat every month and told him I was having a problem and I need him to check out the prop thinking I had a line rapped on it. He said it had a little growth. Humm. Well I took it out Saturday and Sunday and everything is back to normal. Thinking I need to fire this diver. Best of luck to anyone else with troubles.
__________________
Dkdoyle is offline   Reply With Quote
Old 28-10-2011, 13:43   #37
Registered User

Join Date: Aug 2011
Posts: 9
Re: Black Smoke Yanmar 2GM20

I had the same issue and returned to port same day. Bottom guys were scraping the hell out of the shaft and prop as I was napping in the quarterberth. I called the guy that night and asked what that was all about. He said they forgot to do the bottom last month and were really challenged by the growth on prop and shaft primarily. Sure enough it runs like before with no smoke and no dropping rpm's. I added oil and she is back to normal. Simple things indeed.
__________________
jconnor3 is offline   Reply With Quote
Old 28-10-2011, 15:01   #38
Registered User

Join Date: Sep 2011
Location: port aransas
Boat: departure 35
Posts: 116
Re: Black Smoke Yanmar 2GM20

Id be willing to bet you have a air leak somewhere between the fuel pump and the tank. I run into this problem a lot in my line of work. On my new tractor it was the fuel water seperator housing had a tiny crack none could see. The dealer screwed with it three months under warranty and. My symptoms were identical to yours. I ended up finding the problem when I bypassed the filter. Check the fuel system again by bypassing everything from the tank to the fuel pump with a cheap Inline filter. I do hope the bottom job fixed it but these kind of air leaks come and go for no good reason. A diesel would have to lug really hard to smoke luke that.
__________________

__________________
rrranch is offline   Reply With Quote
Reply

Tags
2gm, 2gm20, 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


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
Yanmar 1GM10 - White smoke, no start nickj Engines and Propulsion Systems 11 08-05-2009 08:44
Yanmar issues... white smoke and black oily soot (exhaust) and engine smoke CS27 Engines and Propulsion Systems 3 14-09-2008 18:40
White smoke and oily sheen on water from new rebuilt Yanmar 3JH2E Woody on "Hannah" Engines and Propulsion Systems 25 16-04-2007 20:07



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 00:48.


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.