Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 01-09-2011, 23:09   #1
Registered User

Join Date: Apr 2006
Location: Wherever at anchor
Boat: Brent Swain Pilot House 36' Steel Sloop
Posts: 167
Black Smoke from Yanmar

I have a rebuilt yanmar hm 27 hp 3 cyl... bought it re-built 5 yrs ago. Most of my running is slow speed and I notice little smoke. Recently I had to go full throttle for about 3 minutes and noticed a lot of black smoke. I had heard that the engine should be run at near full throttle until the black smoke blows itself out. Is this correct?

... thanks
bcguy is offline   Reply With Quote
Old 01-09-2011, 23:29   #2
Registered User
neilpride's Avatar

Join Date: Jul 2009
Location: in the world
Boat: csy 44 tall rig.
Posts: 2,680
Re: Black smoke yanmar

You right, Yanmars like hig revs , not low . Also at low revs for long periods you risk to glaze the liners and pistons, causing blowby and blue smoke.

Check the condition of the air filter first, probably injectors to, and run the engine at full to burn all the carbon deposits , asuming you are ok in prop pitch , clean bottom etc...
neilpride is offline   Reply With Quote


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
Black Smoke Yanmar 2GM20 jmdezzutto Engines and Propulsion Systems 37 28-10-2011 14:01
Yanmar OEM Exhaust Elbow or After-Market ? zippy Engines and Propulsion Systems 8 26-07-2011 05:36
Volvo Penta Emitting Black Smoke liomshe1 Engines and Propulsion Systems 0 25-07-2011 06:39
For Sale: Yanmar 3jh2te Nearly Complete, + Prop, + Gearbox, or for Parts Shanaly Classifieds Archive 0 05-07-2011 06:36

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 07:05.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.