Deisel Engine Day Tank. - 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.


Like Tree1Likes
Reply
 
LinkBack Thread Tools
  #1  
Old 08-09-2013
piclarke's Avatar
Senior Member
 
Join Date: Nov 2001
Posts: 200
Thanks: 35
Thanked 1 Time in 1 Post
Rep Power: 13
piclarke is on a distinguished road
Deisel Engine Day Tank.

Considering a day tank on advice received.


What are the advantages of having a day tank and what are the disadvantages of having a day tank.


__________________
"Let the sun shine, let the rain cease, let the lakes and rivers run dry so 2014AD, 2015AD & 2016AD they are good vintage years and gold, elite gold medal winning years for N.Z.wines" NOW!!!


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



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #2  
Old 08-10-2013
Rhapsody-NS27's Avatar
Daniel - Norsea 27
 
Join Date: Apr 2012
Location: Clarksville, TN
Posts: 486
Thanks: 19
Thanked 23 Times in 18 Posts
Rep Power: 3
Rhapsody-NS27 is on a distinguished road
Re: Deisel Engine Day Tank.

I found out my main tank has a leak after the boat got into the water. So that I could still use the boat, I ordered a 3 gal tank to put in line with my engine until I haul out the next time. I am still able to use the boat and the engine seems to like the cleaner fuel. The only thing I had to do was add a fuel return line to the tank.

You can see what I did at my blog. Link in my signature below.
__________________
Daniel
1981 Nor'sea 27,
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Quote:
Aside from what it teaches you, there is simply the indescribable degree of peace that can be achieved on a sailing vessel at sea. I guess a combination of hard work and the seemingly infinite expanse of the sea - the profound solitude - that does it for me. - Billy Campbell
Reply With Quote Share with Facebook
The Following User Says Thank You to Rhapsody-NS27 For This Useful Post:
piclarke (08-10-2013)
  #3  
Old 08-10-2013
Stu Jackson's Avatar
Senior Member
 
Join Date: Jul 2001
Posts: 790
Thanks: 0
Thanked 9 Times in 8 Posts
Rep Power: 14
Stu Jackson is on a distinguished road
Re: Deisel Engine Day Tank.

Advantages:

Two sources of fuel
If installed higher than the engine, the day tank could provide fuel to the engine without a separate electric lift pump or if the lift pump failed

Disadvantages

Requires more fittings/couplings all prone to failure
Needs fuel MANAGEMENT to assure that return line goes to the right place and doesn't overfill an unused tank
Could require more valving for proper management purposes
Very small day tanks have the possibility of heated return fuel increasing the temperature of stored fuel - hot fuel is not good
__________________
Stu Jackson, C34, 1986, M25 engine, Rocna 10 (22#)
Reply With Quote Share with Facebook
  #4  
Old 08-10-2013
piclarke's Avatar
Senior Member
 
Join Date: Nov 2001
Posts: 200
Thanks: 35
Thanked 1 Time in 1 Post
Rep Power: 13
piclarke is on a distinguished road
Re: Deisel Engine Day Tank.

Quote:
Originally Posted by Stu Jackson View Post
Advantages:

Two sources of fuel
If installed higher than the engine, the day tank could provide fuel to the engine without a separate electric lift pump or if the lift pump failed

Disadvantages

Requires more fittings/couplings all prone to failure
Needs fuel MANAGEMENT to assure that return line goes to the right place and doesn't overfill an unused tank
Could require more valving for proper management purposes
Very small day tanks have the possibility of heated return fuel increasing the temperature of stored fuel - hot fuel is not good
Thanks.

The vessel I was on, the day tank was installed above with a eye filling tube
so as over filling avoided. Had a powerful lifting pump to fill the tank with a non return valve and gravity feed to the engine. The day tank was refuelled each time it got low which was every morning approx. Engine room was monitored every hour during running included using heat sensor hand gun for temperature readings any where on the engine fuel lines, gear box, and any where else plus fuel tank.

Commercial fisherman I have spoken to, say they are a must in the tropics, did not think to ask why. So I guess the answer is the engine is not reliant on a fuel pump feeding the engine during running.

Marine engineer stated on non day tank above installation the standard engine lift pump is sucking the fuel from the ships fuel tank which can cause or will cause problems over time. With a day tank the pump is installed so that it is pushing the fuel to the day tank avoiding problems according to him. A pump pushing is 3 times more powerful pushing than sucking, I was told.
__________________
"Let the sun shine, let the rain cease, let the lakes and rivers run dry so 2014AD, 2015AD & 2016AD they are good vintage years and gold, elite gold medal winning years for N.Z.wines" NOW!!!


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



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #5  
Old 08-10-2013
piclarke's Avatar
Senior Member
 
Join Date: Nov 2001
Posts: 200
Thanks: 35
Thanked 1 Time in 1 Post
Rep Power: 13
piclarke is on a distinguished road
Re: Deisel Engine Day Tank.

Quote:
Originally Posted by Rhapsody-NS27 View Post
I found out my main tank has a leak after the boat got into the water. So that I could still use the boat, I ordered a 3 gal tank to put in line with my engine until I haul out the next time. I am still able to use the boat and the engine seems to like the cleaner fuel. The only thing I had to do was add a fuel return line to the tank.

You can see what I did at my blog. Link in my signature below.
Thanks
__________________
"Let the sun shine, let the rain cease, let the lakes and rivers run dry so 2014AD, 2015AD & 2016AD they are good vintage years and gold, elite gold medal winning years for N.Z.wines" NOW!!!


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



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #6  
Old 08-11-2013
Stu Jackson's Avatar
Senior Member
 
Join Date: Jul 2001
Posts: 790
Thanks: 0
Thanked 9 Times in 8 Posts
Rep Power: 14
Stu Jackson is on a distinguished road
Re: Deisel Engine Day Tank.

Quote:
Originally Posted by piclarke View Post
...according to him. A pump pushing is 3 times more powerful pushing than sucking, I was told.
Utter nonsense.
__________________
Stu Jackson, C34, 1986, M25 engine, Rocna 10 (22#)
Reply With Quote Share with Facebook
  #7  
Old 08-14-2013
Member
 
Join Date: Dec 2010
Posts: 54
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 4
NCboatrx is on a distinguished road
Re: Deisel Engine Day Tank.

Quote:
Originally Posted by Stu Jackson View Post
Utter nonsense.
Actually this is quite correct and most definately not nonsense. Pumps have a problem sucking up and if you take the time to check manufacturers specifications on almost all types of pumps, the greater the head on the suction side, the lower the output of the pump. This includes bilge pumps.

As far as pumps used to get diesel from the fuel tank to the engine, they all push fuel out better than they suck. This is why an electric pump is always fitted as close to the fuel tank as possible when there is a long run between the tank and the engine. This will get the engine the fuel it needs to run properly.
__________________
Stanley,
Marine Diesel Engine Vendor
Reply With Quote Share with Facebook
  #8  
Old 08-14-2013
aeventyr60's Avatar
Junior Member
 
Join Date: Jun 2011
Location: Andaman Sea
Posts: 1,494
Thanks: 5
Thanked 23 Times in 23 Posts
Rep Power: 4
aeventyr60 is on a distinguished road
Re: Deisel Engine Day Tank.

Commercial fisherman I have spoken to, say they are a must in the tropics, did not think to ask why. So I guess the answer is the engine is not reliant on a fuel pump feeding the engine during running.

I have been operating in the tropics for 10+ years, with a Perkins 4108. No problems with my system. Gravity feed will not work here.
Fuel pump is engine mounted and driven so it is going to suck.
I had a fuel tank in the bow and the engine fuel pumped sucked it back(20') just fine.
As my diesel mechanic told me "that pump will suck the chrome off a bumper hitch"
Don't over think and over engineer your fuel system. Out here we call it another "stupid cruiser trick". KISS
christian.hess likes this.
__________________

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



"Your dreams minus your doubts equals your net worth"

Life is a short journey, filled with emptiness and pain. Get all the sailing and booty you can.
Reply With Quote Share with Facebook
  #9  
Old 01-15-2014
piclarke's Avatar
Senior Member
 
Join Date: Nov 2001
Posts: 200
Thanks: 35
Thanked 1 Time in 1 Post
Rep Power: 13
piclarke is on a distinguished road
Re: Deisel Engine Day Tank.

Quote:
Originally Posted by aeventyr60 View Post
Commercial fisherman I have spoken to, say they are a must in the tropics, did not think to ask why. So I guess the answer is the engine is not reliant on a fuel pump feeding the engine during running.

I have been operating in the tropics for 10+ years, with a Perkins 4108. No problems with my system. Gravity feed will not work here.
Fuel pump is engine mounted and driven so it is going to suck.
I had a fuel tank in the bow and the engine fuel pumped sucked it back(20') just fine.
As my diesel mechanic told me "that pump will suck the chrome off a bumper hitch"
Don't over think and over engineer your fuel system. Out here we call it another "stupid cruiser trick". KISS
Can't understand that because the vessel I sailed on we where sailing in the Tropics and the COMMERCIAL FISHING PERSON WAS OPERATING in PNG WATERS and thats Tropical.
__________________
"Let the sun shine, let the rain cease, let the lakes and rivers run dry so 2014AD, 2015AD & 2016AD they are good vintage years and gold, elite gold medal winning years for N.Z.wines" NOW!!!


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



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #10  
Old 01-16-2014
denverd0n's Avatar
Senior Member
 
Join Date: Jun 2008
Location: Tampa, FL
Posts: 855
Thanks: 0
Thanked 16 Times in 16 Posts
Rep Power: 7
denverd0n is on a distinguished road
Re: Deisel Engine Day Tank.

Quote:
Originally Posted by aeventyr60 View Post
Gravity feed will not work here.
Some explanation as to why would be nice. Sure, at the equator the force of gravity is about 0.3% less than it is at the poles, but somehow I don't think that's enough difference to make a gravity feed system unworkable.
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
Deisel Engine Training Anyone? East Coast Bene505 General Discussion (sailing related) 14 02-25-2009 12:35 PM
Deisel Engine Question Voyager2007 Gear & Maintenance 8 12-09-2008 06:06 AM
Where to put engine coolant expansion tank preservedkillick Gear & Maintenance 12 11-03-2008 04:17 AM
Gravity Running Tank for Engine capecodphyllis Gear & Maintenance 11 01-18-2007 10:29 AM
12 HP Deisel engine...want a little more power marinesniper Gear & Maintenance 16 08-10-2006 06:03 PM


All times are GMT -4. The time now is 08:04 PM.

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.