Wet exhaust alarm - 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 > Engines > Diesel
 Not a Member? 

Diesel This is a forum dedicated to diesel engines and their applicable accessories.


Reply
 
LinkBack Thread Tools
  #1  
Old 03-05-2011
Senior Member
 
Join Date: Sep 2009
Location: Kingston Washington
Posts: 505
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 5
Waltthesalt is on a distinguished road
Wet exhaust alarm

Iím replacing a raw water cooled A-4 with a fresh water cooled Beta 16. This includes replacing the wet exhaust with fiberglass (Centek) elbows and rubber exhaust hose. The question is whether to install a exhaust temperature alarm.

With the raw water system if flow was lost I would get an immediate engine temp alarm. With a fresh water system there will be a delay before the fresh water system heats up and alarms. Meanwhile, without water injection, the exhaust temp will increase to temperatures above what the fiberglass and rubber can handle. Theoretically they may fail before we are alerted and shut down the engine.

Borel, Vetus and AquaAlarm make exhaust alarm units. Does anyone have any advice or experience on whether or not this is worthwhile to do
Reply With Quote Share with Facebook
  #2  
Old 03-06-2011
Senior Member
 
Join Date: Feb 2010
Location: Narragansett Bay
Posts: 8,845
Thanks: 10
Thanked 131 Times in 117 Posts
Rep Power: 6
Minnewaska will become famous soon enough Minnewaska will become famous soon enough
Just another thought. I have a flow sensor connected just after the strainer and before the impeller. Theoretically, it should alarm at the first sign of reduced flow, rather than wait for temp changes. That could keep you from eating the entire impeller first.
__________________

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

Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
Reply With Quote Share with Facebook
  #3  
Old 03-22-2011
1970 bristol 30 hull #4
 
Join Date: Mar 2011
Location: kemah tx
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
dieseldrifter is on a distinguished road
a exauhst temp sensor is never a bad idea and very simple to wire in. if mounted on a relitivly thin piece of pipe it should alert within 30 second of raw water flow lose. the flow sensor are nice but they have two disadvantages #1 it is two more hose joints in the raw water system I like to keep those to a minimum and #2 it can be impeeded by groth and lead to false alarms. as to keeping an impellor from coming apart and going into your raw water system i could see that but i think a exauhst skin sensor would alert soon enough.
Reply With Quote Share with Facebook
  #4  
Old 03-25-2011
casey1999's Avatar
Senior Member
 
Join Date: Oct 2010
Location: HI
Posts: 2,829
Thanks: 4
Thanked 17 Times in 17 Posts
Rep Power: 4
casey1999 is on a distinguished road
I have bought the aqua alarm exhaust alarm but have not had a chance to mount it. I also purchased some additional temp switches to mount at locations on the engine to warn of high temp (again not had a chance to install).
Reply With Quote Share with Facebook
  #5  
Old 03-25-2011
Senior Member
 
Join Date: Jun 2004
Location: Malaysia
Posts: 314
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
haffiman37 is on a distinguished road
Take the exhaust bend to a machine shop, drill and weld on a nut and install the temp switch just after where the water enters the bend.
Reply With Quote Share with Facebook
  #6  
Old 06-16-2011
Junior Member
 
Join Date: Jun 2011
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Borel is on a distinguished road
Wet exhaust alarm

We have been selling raw water failure alarms for over 10yrs and this is what we have learned.
Although a flow sensor would make the most sense, in reality, over time they have a tendency to clog up and stop working or give false alarm.
We have also had several customers report the raw water injection hose broke off. In this case a flow sensor would not indicate loss off cooling water to exhaust gases. Thermal sensors are the easiest to install and get the job done. Weather you buy ours or from another supplier, wet exhaust alarm is a wise investment.
You are protecting a very expensive piece of equipment for very little cost or time to install.
We talk to owners all day who have either burned up their exhaust system or damaged their engine due to loss of raw cooling water.

Borel Manufacturing
Reply With Quote Share with Facebook
  #7  
Old 06-18-2011
Senior Member
 
Join Date: Feb 2010
Location: Narragansett Bay
Posts: 8,845
Thanks: 10
Thanked 131 Times in 117 Posts
Rep Power: 6
Minnewaska will become famous soon enough Minnewaska will become famous soon enough
Borel. Thanks for the food for thought. I'm beginning to think that both would be a good idea.
__________________

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

Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
Reply With Quote Share with Facebook
  #8  
Old 06-18-2011
Stu Jackson's Avatar
Senior Member
 
Join Date: Jul 2001
Posts: 788
Thanks: 0
Thanked 9 Times in 8 Posts
Rep Power: 14
Stu Jackson is on a distinguished road
If you have an engine temperature gauge and alarm, why would you need another one? Just a contrary approach.
__________________
Stu Jackson, C34, 1986, M25 engine, Rocna 10 (22#)
Reply With Quote Share with Facebook
  #9  
Old 06-18-2011
Senior Member
 
Join Date: Feb 2010
Location: Narragansett Bay
Posts: 8,845
Thanks: 10
Thanked 131 Times in 117 Posts
Rep Power: 6
Minnewaska will become famous soon enough Minnewaska will become famous soon enough
Quote:
Originally Posted by Stu Jackson View Post
If you have an engine temperature gauge and alarm, why would you need another one? Just a contrary approach.
I have a temp gauge, but it's near my ankle. No way I would notice it in time. I've seen many configurations like that. Not good, but common. If you only have a temp alarm, you will likely already have eaten the impeller or done some heat damage by the time it goes off. The flow alarm says you lost flow before she heats up or eats the rest of the impeller (in theory, as Borel explains above). Both sounds like a winner to me.
__________________

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

Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
Reply With Quote Share with Facebook
  #10  
Old 06-19-2011
Senior Member
 
Join Date: Nov 2010
Location: Baltimore
Posts: 401
Thanks: 6
Thanked 5 Times in 5 Posts
Rep Power: 4
MastUndSchotbruch is on a distinguished road
Quote:
Originally Posted by Minnewaska View Post
I have a temp gauge, but it's near my ankle. No way I would notice it in time. I've seen many configurations like that. Not good, but common. If you only have a temp alarm, you will likely already have eaten the impeller or done some heat damage by the time it goes off. The flow alarm says you lost flow before she heats up or eats the rest of the impeller (in theory, as Borel explains above). Both sounds like a winner to me.
I agree, one does not stand in for the other.

I plan on installing a wet exhaust alarm and I am trying to decide between the Aqualarm and the Borel. What I like about the Aqualarm is that I do not have to cut a 2" hole, I believe that it is surface-mount (correct me if I am wrong). However, I wonder if it is loud enough. It says it uses a 'buzzer' and I am concerned that I will not be able to hear it in the cockpit if it is installed in the cabin (or vice-versa). In particular when the motor is running.

Does anyone know how loud the Aqualarm is? Is the Borel substantially louder?
Reply With Quote Share with Facebook
Reply


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
Alarm Chattering DallasH20 Electrical Systems 3 06-20-2011 02:45 AM
louder Alarm. SimonV Gear & Maintenance 13 04-06-2008 12:29 PM
Oil alarm sound? Joesaila Gear & Maintenance 3 07-09-2007 11:30 PM
Propane Alarm mrhill Island Packet 3 11-13-2006 04:32 PM
anchor alarm genesis-uno General Discussion (sailing related) 3 03-08-2006 09:49 AM


All times are GMT -4. The time now is 09:17 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.