Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 10-05-2010, 14:30   #1
Registered User

Join Date: Nov 2007
Location: Libertyville, IL
Boat: Evelyn 32
Posts: 6
Engine Compartment Blower for Diesel ?

Hi all;

I have a question about whether or not a diesel powered boat (Beneteau 352) requires positive ventilation of the engine compartment to be safe, or to conform with any Coast Guard or other regulations.

Currently, the engine blower comes once the ignition is turned on, and stays on until the engine is killed and the key switched off.

Is this correct? I've been on several charter boats with diesel engines, and previously owned a boat with an Atomic 4, and I don't remember ever having a blower constantly on for the engine compartment.

We'd like to add a switch for the blower, to clear the compartment of fumes, etc. as a safety precaution before starting (might be overkill?) and run it occasionally to clear out engine smells after running the engine.

Any thoughts, oh wise ones?

Steve
__________________

__________________
muchmsw is offline   Reply With Quote
Old 10-05-2010, 14:42   #2
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
A diesel powered boat does not "require" any positive ventilation but a blower will help keep the temperature of the engine compartment down.
__________________

__________________
DeepFrz is offline   Reply With Quote
Old 10-05-2010, 14:53   #3
Registered User
 
Iolite's Avatar

Join Date: Jun 2007
Location: Gulf coast of Florida
Boat: Jeanneau 40DS
Posts: 9
Send a message via AIM to Iolite
Our Jeanneau 40 has a thermostat on the blower it only comes on when the boat is operated in hot weather. also will cycle on and off as needed.
__________________
Iolite is offline   Reply With Quote
Old 10-05-2010, 15:51   #4
Registered User

Join Date: Jun 2005
Posts: 1,901
A blower is not required by regulation on a diesel boat.
Running a blower is a good idea for ventilation. This also provides cool air for the engine to breathe.
__________________
never monday is offline   Reply With Quote
Old 10-05-2010, 18:18   #5
Registered User
 
lorenzo b's Avatar

Join Date: May 2009
Location: Panama
Boat: Steel trawler 63' Eileen Farrell
Posts: 961
To check if the engine is getting enough air run it with the compartment closed and then open the hatch and listen wether the engine runs differently.Blowing air in will help the engine, blowing out will cool the engine after it shuts down. Blowing out when the engine is running will fight the engine's natural draw of air through the vent, blowing in to cool the engine when off may force some hot air into the rest of the boat.
__________________
lorenzo b is offline   Reply With Quote
Old 10-05-2010, 18:24   #6
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,150
I would only add a forced draft ventilation if the compartment is running too hot. But then if it is running too hot it may be better to add some passive ventilation. Some diesel manufacturers will only warrant a diesel if the engine compartment temperature stays X amount of degrees below the outside ambient temperature.
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 10-05-2010, 22:31   #7
Senior Cruiser
 
FSMike's Avatar

Cruisers Forum Supporter

Join Date: Aug 2009
Location: Bahamas/Florida
Boat: Solaris Sunstar 36' catamaran
Posts: 2,654
Images: 5
Each of our engine rooms has a dorade piped to the forward end of the compartment for fresh air intake, and a vent with exhaust fan mounted in the aft end of the compartment. The fans are always on when the engines are running, and we typically run them for a few minutes after shutting down the engines.
Can't think of a reason to not use them when the engines are running.
__________________
Sail Fast Live Slow
FSMike is offline   Reply With Quote
Old 14-05-2010, 14:25   #8
Eternal Member
 
capt_douglas's Avatar

Join Date: May 2003
Location: Ft. Lauderdale, FL
Boat: Vancouver 36 cutter????
Posts: 620
Send a message via Skype™ to capt_douglas
I connected a timer to my engine room blower on the Endeavor 37. It would come on when the key was turned on, and was programmed to stop 15 minutes after the key was turned off. I felt that the added air flow would cool the engine down better, prevent heat migration from the less than stellar engine room insulation, and remove any "vapors".

I also had a bypass switch that I could use to turn the blower on when working in the engine compartment.
__________________
Capt. Douglas Abbott
USCG/MCA IV/M.I./C.I. 500-ton Oceans
capt_douglas is offline   Reply With Quote
Old 14-05-2010, 14:34   #9
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
capt_douglas, did you make the circuitry for the timer yourself or was it off the shelf? If you designed it yourself would you mind posting the schematic? Thanks.
__________________

__________________
DeepFrz is offline   Reply With Quote
Reply

Tags
engine

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
Engine Compartment Insulation Immanuel Construction, Maintenance & Refit 13 27-10-2009 17:16
Diesel Engine Hours Sandero Engines and Propulsion Systems 13 29-07-2009 20:58
DIESEL ENGINE HELP quartersplash Engines and Propulsion Systems 12 09-02-2009 19:39
Question about diesel engine course brian and clare Construction, Maintenance & Refit 8 20-07-2007 06:05
Engine Compartment Insulation Longhair Engines and Propulsion Systems 8 29-03-2006 06:46



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 14:11.


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.