Reply
 
Thread Tools Search this Thread
 
Old 26 October 2013, 00:18   #21
RIBnet admin team
 
willk's Avatar
 
Country: Ireland
Make: Redbay Boats
Length: 9m +
Engine: 370hp
Join Date: Feb 2008
Posts: 12,927
RIBase
I've been told by several people that letting your tank run dry/nearly dry will suck up water and crap in to your engine. I don't understand how this is supposed to happen?

Boat tanks are well shaken in use, so fine crud will surely go into suspension during use.

Water sinks. Fuel lift pipes end VERY low in the tank. Surely they'll lift any water they touch, irrespective of how much clean/dry fuel is above them?

There is some exceedingly dirty fuel (especially diesel) for sale. Marinas have a poor rep in this regard, but I've received some awful dross from big name suppliers inland too.

Good filters, spare filters and water separators are a must. Diesel bug thrives at the water/fuel interface, so keeping tanks free of water has to be a good idea. Filling your tank in Autumn and adding a treatment can't hurt.
__________________

__________________
"Who knows what evil lurks in the hearts of men?"
.
willk is offline   Reply With Quote
Old 26 October 2013, 04:12   #22
Member
 
Crusher's Avatar
 
Country: UK - England
Town: Southampton
Boat name: Bubbas Bouy
Length: 7m +
Engine: Mercruiser
Join Date: Mar 2011
Posts: 626
RIBase
Quote:
Originally Posted by willk View Post
I've been told by several people that letting your tank run dry/nearly dry will suck up water and crap in to your engine. I don't understand how this is supposed to happen?
Me too!! I've never understood this theory!!
__________________

__________________
Crusher is offline   Reply With Quote
Old 26 October 2013, 13:03   #23
Member
 
lakelandterrier's Avatar
 
Country: UK - England
Town: Gloucester
Boat name: Lunasea
Make: Ribcraft
Length: 5m +
Engine: Suzi 140
MMSI: 232005050
Join Date: Sep 2007
Posts: 1,126
I try to leave my 90l SS internal tank about 2/3 full with petrol over winter (Nov-March). Boat kept out of doors, but sheltered between 2 buildings.

My logic is that this should minimise any condensation (but any water should be caught in the separator), and if the fuel does degrade over the winter, this will be diluted by topping up with 30% fresh. Not had any problems with this method (so far).
__________________
Member of the Macmillan Round the Isle of Wight Club
lakelandterrier is offline   Reply With Quote
Old 26 October 2013, 14:18   #24
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 10,114
Quote:
Originally Posted by willk View Post
There is some exceedingly dirty fuel (especially diesel) for sale.
I'm surprised you have that problem. My friends across the Irish sea tell me its very easy to get "laundered" fuel if you know where to go
__________________
Poly is offline   Reply With Quote
Old 26 October 2013, 14:18   #25
nik
Member
 
Country: UK - England
Town: east cowes
Make: academic
Length: no boat
Engine: fresh air
MMSI: N/A
Join Date: Sep 2003
Posts: 540
Quote:
Originally Posted by Bittentobuggery View Post
can I ask how many times you ran your tank dry ?

As I see it, you could be building up a potential problem without realising it. If there is any water, it will sit in the bottom of the tank and only present itself when you are draining the dregs of the tank.
I really don't understand this argument.
Water will sit at the bottom of the tank.
The fuel pickup pipe will be at or very near the bottom of the tank.
I can't see "how much fuel is in the tank" will affect water being picked up. The fuel pickup height does not change with the level of fuel in the tank.

I totally agree with having a water trap and I can see that keeping the tank full will reduce condensation. But even if you do not keep your tank full and you get condensation, the water trap should take care of it. Assuming you check regurlarly and drain if necessary.

Just to reiterate, I did not bother keeping my tank brimmed, although generally more than half full and I never had a water or bug problem.
__________________
nik is offline   Reply With Quote
Old 26 October 2013, 15:01   #26
RIBnet admin team
 
willk's Avatar
 
Country: Ireland
Make: Redbay Boats
Length: 9m +
Engine: 370hp
Join Date: Feb 2008
Posts: 12,927
RIBase
Quote:
Originally Posted by Poly View Post
I'm surprised you have that problem. My friends across the Irish sea tell me its very easy to get "laundered" fuel if you know where to go
Your friends can't be local or are hopeless optimists. Unless you know where to go, you'll almost certainly be using it...

__________________

__________________
"Who knows what evil lurks in the hearts of men?"
.
willk is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 17:16.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.