Diesel Fumes & Ventilation - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 04-17-2012
Junior Member
 
Join Date: Apr 2012
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
raycoker is on a distinguished road
Diesel Fumes & Ventilation

I have a 1987 303. Yanmar 16. I get a lot of diesel fume smell below when under power. The engine room is sealed well. I also noticed that I do not have any ventilation anywhere on the stern. It seems to me that I should mount an intake and exhaust vents on the stern and attach an inline fan to the exhaust with the hose down near the motor.

When I get back to the slip I always have to let it air out.

I am a novice and just got this pearson. I had the engine checked out by mech before purchase. It runs cool and well.

Please advise.
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 04-17-2012
Tim R.'s Avatar
Senior Member
 
Join Date: Mar 2003
Location: Portland, Maine
Posts: 1,542
Thanks: 1
Thanked 27 Times in 26 Posts
Rep Power: 12
Tim R. is on a distinguished road
Re: Diesel Fumes & Ventilation

We have a yanmar and get absolutely no diesel smell in the engine compartment.

Venting sounds like you are simply treating the symptoms of a bigger problem. Could be an exhaust leak or a fuel leak. Better to solve it properly of it could be dangerous.

Venting is not a bad idea anyway but the intake is in the engine compartment so it creates a low pressure area that sucks air in from the cabin or a passive vent to the outside. Exhaust is on the transom.
__________________
Tim R.
Out cruising
1997 Caliber 40LRC

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

-----------------------------------------------------
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 04-17-2012
Junior Member
 
Join Date: Apr 2012
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
raycoker is on a distinguished road
Re: Diesel Fumes & Ventilation

Thanks Tim
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 04-17-2012
Jetexas's Avatar
Senior Member
 
Join Date: Apr 2012
Location: Houston, TX
Posts: 117
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 3
Jetexas is on a distinguished road
Re: Diesel Fumes & Ventilation

I agree. It sounds like an exhaust leak.
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 04-17-2012
pete
 
Join Date: Sep 2011
Location: boston ma
Posts: 46
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 0
beachmont is on a distinguished road
Diesel Fumes & Ventilation

Do you smell fuel or exhaust?
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 04-17-2012
asdf38's Avatar
Senior Member
 
Join Date: Jul 2010
Posts: 724
Thanks: 1
Thanked 8 Times in 8 Posts
Rep Power: 5
asdf38 is on a distinguished road
Re: Diesel Fumes & Ventilation

Quote:
Originally Posted by treilley View Post
We have a yanmar and get absolutely no diesel smell in the engine compartment.

Venting sounds like you are simply treating the symptoms of a bigger problem. Could be an exhaust leak or a fuel leak. Better to solve it properly of it could be dangerous.

Venting is not a bad idea anyway but the intake is in the engine compartment so it creates a low pressure area that sucks air in from the cabin or a passive vent to the outside. Exhaust is on the transom.
So are you saying it's not necessarily to vent the engine compartment?

In previous years I sailed with the engine compartment open to the cabin. It's fairly recessed and the battery switch was placed within the compartment. So it was much easier to just leave the cover off (It's just a piece of wood and doesn't cut down on noise. Note, I never noticed fumes in the past). But as part of a re-wire I moved the battery switch out which gives me the option of actually using the cover.

Should I worry about venting? Of course it's far from air tight, there are openings to both cockpit lockers for wiring and engine controls which both have openings to the cabin for wiring etc.
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 04-17-2012
Tim R.'s Avatar
Senior Member
 
Join Date: Mar 2003
Location: Portland, Maine
Posts: 1,542
Thanks: 1
Thanked 27 Times in 26 Posts
Rep Power: 12
Tim R. is on a distinguished road
Re: Diesel Fumes & Ventilation

Quote:
Originally Posted by asdf38 View Post
So are you saying it's not necessarily to vent the engine compartment?

In previous years I sailed with the engine compartment open to the cabin. It's fairly recessed and the battery switch was placed within the compartment. So it was much easier to just leave the cover off (It's just a piece of wood and doesn't cut down on noise. Note, I never noticed fumes in the past). But as part of a re-wire I moved the battery switch out which gives me the option of actually using the cover.

Should I worry about venting? Of course it's far from air tight, there are openings to both cockpit lockers for wiring and engine controls which both have openings to the cabin for wiring etc.
Is your inboard engine gasoline or diesel? If your exhaust system is not leaking, the best reason to ventilate a diesel engine compartment is to reduce heat.

Venting a gasoline engine compartment should be obvious.
__________________
Tim R.
Out cruising
1997 Caliber 40LRC

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

-----------------------------------------------------
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 04-17-2012
Faster's Avatar
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 15,303
Thanks: 88
Thanked 241 Times in 232 Posts
Rep Power: 10
Faster has a spectacular aura about Faster has a spectacular aura about Faster has a spectacular aura about
Re: Diesel Fumes & Ventilation

Such smells can come from exhaust leaks, as indicated, from hot oil leaks, and from blowby or having the PCV hose disconnected from the air cleaner/intake. Older engines that still run well can suffer from blowby which can overload the 'suction' system intended for them and result in hot oil fumes within the cabin space.

We had a half season of exhaust smells where no apparent leak existed. Last fall I removed the exhaust elbow and, despite looking solid parts of it were virtually porous. A new SS assembly and we're smell free again.

I do like the idea of a blower in the compartment to remove excess heat as Treilley suggests.. newer Beneteaus have them that run anytime the engine is running. An off delay function would be better still.
__________________
Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Reply With Quote Quick reply to this message Share with Facebook
Reply

Tags
diesel smell

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Smell of Diesel fumes in Engine Compartment casey1999 Diesel 10 08-19-2011 12:17 AM
Varnish Fumes! zAr Gear & Maintenance 15 10-13-2009 08:01 PM
Exhaust fumes theartfuldodger Sailboat Design and Construction 2 08-03-2008 09:50 PM
Check that bilge for volatile fumes. TrueBlue General Discussion (sailing related) 13 04-25-2008 01:31 PM


All times are GMT -4. The time now is 06:03 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.