Deisel Engine Day Tank. - SailNet Community
 1Likes
Reply
 
LinkBack Thread Tools
post #1 of 16 Old 08-09-2013 Thread Starter
Senior Member
 
piclarke's Avatar
 
Join Date: Nov 2001
Posts: 277
Thanks: 50
Thanked 2 Times in 2 Posts
Rep Power: 14
 
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.




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.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
piclarke is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 16 Old 08-10-2013
Daniel - Norsea 27
 
Rhapsody-NS27's Avatar
 
Join Date: Apr 2012
Location: Me: VA Boat: TN
Posts: 667
Thanks: 42
Thanked 31 Times in 26 Posts
Rep Power: 4
 
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:
“Who is staring at the sea is already sailing a little.”
-Paul Carvel
Rhapsody-NS27 is online now  
Quote Quick Reply Share with Facebook
The Following User Says Thank You to Rhapsody-NS27 For This Useful Post:
piclarke (08-10-2013)
post #3 of 16 Old 08-10-2013
Senior Member
 
Stu Jackson's Avatar
 
Join Date: Jul 2001
Posts: 902
Thanks: 0
Thanked 15 Times in 14 Posts
Rep Power: 15
 
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#)
Stu Jackson is offline  
Quote Quick Reply Share with Facebook
post #4 of 16 Old 08-10-2013 Thread Starter
Senior Member
 
piclarke's Avatar
 
Join Date: Nov 2001
Posts: 277
Thanks: 50
Thanked 2 Times in 2 Posts
Rep Power: 14
 
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.


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.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
piclarke is offline  
Quote Quick Reply Share with Facebook
post #5 of 16 Old 08-10-2013 Thread Starter
Senior Member
 
piclarke's Avatar
 
Join Date: Nov 2001
Posts: 277
Thanks: 50
Thanked 2 Times in 2 Posts
Rep Power: 14
 
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


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.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
piclarke is offline  
Quote Quick Reply Share with Facebook
post #6 of 16 Old 08-11-2013
Senior Member
 
Stu Jackson's Avatar
 
Join Date: Jul 2001
Posts: 902
Thanks: 0
Thanked 15 Times in 14 Posts
Rep Power: 15
 
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#)
Stu Jackson is offline  
Quote Quick Reply Share with Facebook
post #7 of 16 Old 08-14-2013
Member
 
Join Date: Dec 2010
Posts: 56
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 5
 
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
NCboatrx is offline  
Quote Quick Reply Share with Facebook
post #8 of 16 Old 08-14-2013
Junior Member
 
aeventyr60's Avatar
 
Join Date: Jun 2011
Location: Andaman Sea
Posts: 2,487
Thanks: 27
Thanked 70 Times in 67 Posts
Rep Power: 5
 
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.
aeventyr60 is offline  
Quote Quick Reply Share with Facebook
post #9 of 16 Old 01-15-2014 Thread Starter
Senior Member
 
piclarke's Avatar
 
Join Date: Nov 2001
Posts: 277
Thanks: 50
Thanked 2 Times in 2 Posts
Rep Power: 14
 
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.


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.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
piclarke is offline  
Quote Quick Reply Share with Facebook
post #10 of 16 Old 01-16-2014
Senior Member
 
denverd0n's Avatar
 
Join Date: Jun 2008
Location: Tampa, FL
Posts: 1,023
Thanks: 0
Thanked 24 Times in 24 Posts
Rep Power: 8
 
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.
denverd0n is offline  
Quote Quick Reply Share with Facebook
Reply

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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page



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

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome