Reply
 
Thread Tools Search this Thread
 
Old 14 April 2006, 11:29   #1
Member
 
Daibheid's Avatar
 
Country: Ireland
Town: Cork
Boat name: Excalibur
Make: Excalibur + Zapcat
Length: 6m +
Engine: Merc120TDI,Tohatsu50
Join Date: Jun 2005
Posts: 245
Viper -No Fuel Guage - How much is left!!!!

I just bought an ex-dive Viper with the standard built in tank. It was supposed to have a fuel guage but in fact only has the fuel sender in the tank and no guage. This may or may not work but the non-existent wiring is not inspiring.

With the extended and convoluted filler and breather hoses I can't see (by the light of my cigarette lighter of course!) any way to tell how much fuel is in the tank (apart from performing the slosh test by picking the boat up and shaking it). But I don't want to do that too often so any ideas would be welcome.

I'd appreciate it if anyone out there has figures for the resistance readings the sender should give at empty to full and also where I might lay hands on a suitable guage?

Othewise I fear having to replace the sender with a matched guage+sender unit and it looks like it's glassed in with the tank.

The sender is very vulnerable sitting right where all the straps/weigh belts/spare anchor/chain/O2bottle/WHY get dumped into the console so maybe some of you have had this problem. It's also why I'll be surprised if it still works.

Have a great Long Weekend - I'll be spending mine in search of a very long flexible dip stick!

D
__________________

__________________
Daibheid is offline   Reply With Quote
Old 14 April 2006, 11:52   #2
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
Stevetheboat on this forum will sell you a gauge. He does them as a kit, c/w sender unit, but if your sender's ok, the gauge should be compatible. I think they're pretty universal. The kit costs around £30. They're also often on e-bay. Here's a link for one on sale now:

http://cgi.ebay.co.uk/Fuel-Tank-Gaug...QQcmdZViewItem

Good luck
__________________

__________________
Downhilldai is offline   Reply With Quote
Old 14 April 2006, 12:12   #3
Member
 
Pete7's Avatar
 
Country: UK - England
Town: Gosport
Boat name: April Lass
Make: Moody 31
Length: 9m +
Join Date: Aug 2001
Posts: 4,850
Quote:
Originally Posted by Daibheid
The sender is very vulnerable sitting right where all the straps/weigh belts/spare anchor/chain/O2bottle/WHY get dumped into the console so maybe some of you have had this problem. It's also why I'll be surprised if it still works.D
I was going to say most of the Osprey viper tanks that are under a console are normally either 20 or 30 gallons. However I am not sure what you have got, any chance of some photos ? The long flexible dip stick approach is much more reliable than some fuel gauges btw. Empty the tank, then fill it up in five gallon shots at the garage marking the stick as you go. Whats the boat length ?

Pete
__________________
.
Ribnet is best viewed on a computer of some sort
Pete7 is offline   Reply With Quote
Old 14 April 2006, 14:39   #4
Now back to being Mollers!
 
Country: UK - England
Town: Arundel
Boat name: Mike Bravo 1
Make: Scorp
Length: 9m +
Engine: Yanmar 300
Join Date: Oct 2005
Posts: 652
I wouldn't write the sender off without testing it. It might be worth cleaning up the contacts on the top of it and connecting it to a compatible gauge. The working parts are immersed in an oily enviroment so could be ok.
__________________
Alice is offline   Reply With Quote
Old 14 April 2006, 16:24   #5
Member
 
Country: Ireland
Town: Dublin & Enniscrone
Boat name: K'adů
Make: Redbay
Length: 7m +
Engine: Suzuki 300
Join Date: Oct 2004
Posts: 613
fuel meter

Have you seen the Navman fuel flow meters?

Rgds
__________________
Take it easy ....but, take it all the way.
Ezgoing is offline   Reply With Quote
Old 18 April 2006, 06:54   #6
Member
 
Daibheid's Avatar
 
Country: Ireland
Town: Cork
Boat name: Excalibur
Make: Excalibur + Zapcat
Length: 6m +
Engine: Merc120TDI,Tohatsu50
Join Date: Jun 2005
Posts: 245
Great suggestions all -thanks. Anyone have numbers for testing the sender?

Quote:
Originally Posted by Pete7
However I am not sure what you have got, any chance of some photos ? The long flexible dip stick approach is much more reliable than some fuel gauges btw. Empty the tank, then fill it up in five gallon shots at the garage marking the stick as you go. Whats the boat length ?

Pete
Pete it's a 5.25 -pic attached and I can get a pic of the tank/sender if that was what you actually meant? Good idea on the fill and graduate although emptying the tank might be messy. I could probably just add fuel in steps and get an idea of the level difference by adding 5 gallons (or 25 litres as I should use!).I could then extrapolate and graduate from empty, the bottom of the dipstick, without emptying it.
I abslutely agree about the reliability of guages but at least they give you some indication whether you're approaching Bingo and need to stop and get the dipstick out before you start sucking air. Even small 2 strokes IMHO are very unpredictable and variable on burn rates.

Quote:
Originally Posted by Alice
I wouldn't write the sender off without testing it. It might be worth cleaning up the contacts on the top of it and connecting it to a compatible gauge. The working parts are immersed in an oily enviroment so could be ok.
Alice I'm with you on this one and suspect it's just the wires got obliterated. But I don't know yet how to check the sender 8-(

Quote:
Originally Posted by Downhilldai
Stevetheboat on this forum will sell you a gauge. He does them as a kit, c/w sender unit, but if your sender's ok, the gauge should be compatible. I think they're pretty universal. The kit costs around £30. They're also often on e-bay. Here's a link for one on sale now:

http://cgi.ebay.co.uk/Fuel-Tank-Gaug...QQcmdZViewItem

Good luck
Thanks Dai for the suggestion- if all else fails this could be very useful. However I'd really prefer not to have to break the seal into the tank. That spot gets plenty wet and a bulit-in tank is not somewhere I want to risk contamination. But the link is filed! I'll contact Steve about a guage if I can establish the sender is OK.

Quote:
Originally Posted by Ezgoing
Have you seen the Navman fuel flow meters?

Rgds
Hi Ez, I glanced at the Navman idea but I'm Humminbird based and frankly after spending the New Bathroom loan from the credit union on the boat I've enough damage done on the finances for a bit without switching electronics package!

Thanks again to everyone for a solid bunch of helpful contributions. now if someone can just tell me how to check a working sender. I have good access to multimeters etc.

Dave

PS Pete I see you flying the flag in your sig for Drivers Wharf - I'm happy to endorse them too as I dealt with them last year (Gill) and found her terrific to deal with and their rates very reasonable
Attached Thumbnails
Click image for larger version

Name:	ComboViper.jpg
Views:	179
Size:	14.3 KB
ID:	18549  
__________________
Daibheid is offline   Reply With Quote
Old 18 April 2006, 07:09   #7
Member
 
Country: UK - England
Town: Newquay, Cornwall.
Boat name: None :(
Make: None :(
Length: 5m +
Engine: None :(
MMSI: None :(
Join Date: Jun 2005
Posts: 1,280
NAVMAN F2100 fuel flow gauge is perfect.

since I calibrated mine (ie filled up - used loads of fuel then filled up again and told the meter how much i used) - It is now accurate to within one litre over 110 litres of used fuel (that's better then 1%)

Every time i fill the tank up i reset it to 180 litres and i always know Exactly how much fuel is in my tank

I picked mine up from the states for around £70 and it only needs a single 2" hole drilled in the dash
roycruse is offline   Reply With Quote
Old 18 April 2006, 08:43   #8
Member
 
Pete7's Avatar
 
Country: UK - England
Town: Gosport
Boat name: April Lass
Make: Moody 31
Length: 9m +
Join Date: Aug 2001
Posts: 4,850
Dave, the Vipers had either 20 gallon (90L) or 30 gallon (130) tanks, unless you have something really odd (unlikely). From memory The 20 gallon tank left about 9 inches between the back of the tank and the underdeck tube. the 30 gallon tank was tight up against the the underdeck tube. However there is another way of working it out. I think the tanks are 18" deep (but it was 10 years ago) , so if you measure the width and length you have the volume. Charles (CT01) found this site which will help with the calcs.

http://www.onlineconversion.com/

The tank is wrapped in glass then set in through the deck and more glass added. When I dropped a torch into my viper tank (don't ask) I had to cut the tank and put one of these in from Vetus. It might be an option as the fuel gauge is going to be a sod to get out.

Superb boats for there size btw

Pete
Attached Thumbnails
Click image for larger version

Name:	Tank.gif
Views:	144
Size:	13.2 KB
ID:	18552  
__________________
.
Ribnet is best viewed on a computer of some sort
Pete7 is offline   Reply With Quote
Old 18 April 2006, 08:48   #9
Member
 
Pete7's Avatar
 
Country: UK - England
Town: Gosport
Boat name: April Lass
Make: Moody 31
Length: 9m +
Join Date: Aug 2001
Posts: 4,850
Final thought, I am not an electrician, but I think the fuel sender units are a variable resistor, it wouldn't take much to convert one into a heating element by connecting it up wrong and its all exposed inside the tank.

Pete
__________________
.
Ribnet is best viewed on a computer of some sort
Pete7 is offline   Reply With Quote
Old 18 April 2006, 09:31   #10
Member
 
Country: UK - Scotland
Town: Inverkip
Make: Redbay 11m Cabin
Length: 10m +
Engine: 2 x Yamaha422Sti 275
Join Date: Feb 2003
Posts: 567
Quote:
Originally Posted by Pete7
Final thought, I am not an electrician, but I think the fuel sender units are a variable resistor, it wouldn't take much to convert one into a heating element by connecting it up wrong and its all exposed inside the tank.

Pete
So my previous faffing about swapping the wires around till it worked wasnt really a good idea!!!
Andy
__________________

__________________
Hard or Soft it's never BIG enough
Andy Gee 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 11:58.


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