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Old 18 April 2006, 11:22   #11
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Osprey Sender Unit.

I replaced the sender unit on our Osprey a few years ago.

Although the sender unit looked as if it was glassed in after looking more carefully it was actually held in place with stainless steel screws, so was quite easy to remove and test and then replace.

Have a closer look it may be that with a little careful removal of some glass fibre you may be able to see screw heads.

Also I think the 90 litre tank is contained within the consul, if you have a 130ltr tank it will stick out a little at the base of the consul.

I am a big fan of the Viper but I would say that mine is 12 years old this year..
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Old 18 April 2006, 11:51   #12
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Hi guys... long time no RIBnet!

My viper gauge was also held in with small nuts (studds glassed into top of the tank) and i managed to buy a new sender and install it HOWEVER i would strongly asvise against this because since i broke the seal i had lots of problems with getting a new seal - tried lots of rubbers and sealants and in the end had to glass right over the top of all the wires and connections to stop it leaking.

The fuel gauge is a variable resistor, yes. Don't recall the range but they are petty standard in the marine world. I could find it out and tell you if required - if you know how to use a multimeter you could then test the sender, but any (make) of marine gauge should work - a quicksilver one is quite common in most chandlers. I may have one if you can't source one. I also have a new sender if you want to buy it.
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Old 18 April 2006, 13:37   #13
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Well my viper must be the exception to the rule. I can only seem to fill with 15 gallons max.

Have a word with Dave Manning off here, Dave seems to be Dr.Viper
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Old 18 April 2006, 15:54   #14
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Quote:
Originally Posted by Daniel
The fuel gauge is a variable resistor, yes. Don't recall the range but they are petty standard in the marine world.
No they're not, you've got the choice of euro or american!
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Old 19 April 2006, 08:47   #15
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OK, OK, but i've never had a yankie boat - and they don't make RIBs i don't think. Would it be fair to assume unless we had an american boat they are all compatable or would we be seeing amerian senders in european tanks and boats?
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Old 19 April 2006, 11:58   #16
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Sender looks functional 20KOhm reading at 40% full

Quote:
Originally Posted by Daniel
...My viper gauge was also held in with small nuts (studds glassed into top of the tank) and i managed to buy a new sender and install it HOWEVER i would strongly asvise against this because since i broke the seal i had lots of problems with getting a new seal - tried lots of rubbers and sealants and in the end had to glass right over the top of all the wires and connections to stop it leaking.

The fuel gauge is a variable resistor, yes. Don't recall the range but they are petty standard in the marine world. I could find it out and tell you if required - if you know how to use a multimeter you could then test the sender, but any (make) of marine gauge should work - a quicksilver one is quite common in most chandlers. I may have one if you can't source one. I also have a new sender if you want to buy it.
Thanks Daniel for confirming what I believed about not breaking the seal unless absolutely essential. That seal is under serious dynamic hydraulic pressure when the boat is bouncing down and the fuel is sloshing backward.

I got a resistance reading of 20KOhms at about 40% full. the fact it's not open circuit looks good so guage looks worth a shot. If you can give me hte range I'd appreciate it

Quote:
Originally Posted by Viper
I replaced the sender unit on our Osprey a few years ago.

Although the sender unit looked as if it was glassed in after looking more carefully it was actually held in place with stainless steel screws, so was quite easy to remove and test and then replace.
.......
Also I think the 90 litre tank is contained within the consul, if you have a 130ltr tank it will stick out a little at the base of the consul.
Hi Viper, (I take it you're never going to change to anything other than another Viper <GRIN> seems to be some strong brand loyalty among Viper owners here!) You're right about access to it once the crud is cleared away but it looks like it may be OK. With your info and what Pete said about space back to the services tube, the pic attached suggests it's a 90L tank.
BTW what was wrong with your sender that you had to replace it?

So how did I establish it's 40% full? Well I eventually figured out a way to dip the tank. After quite a while of wandering around the garden and garage looking for inspiration (it worked for Newton and he didn't even get off his ass) with all dipstick ideas tempered by Pete's tantalising mention about getting his torch out of his tank, I'd tried quite a few items without success. Then I tried a fibreglass sail batten out of a sailboard sail and it went right past the S bend of the plastic tube but fouled on the metal lip of the tank. I cut across it at 45deg and filed a one-sided chamfer on to that (so it looked a bit like a dagger tip) and with a slight twist as the 45deg point touched the tank/hose joint Eureka it went on past the joint to thump the bottom of the tank giving me a reasonable indication of the fuel level.

Quote:
Originally Posted by roycruse
NAVMAN F2100 fuel flow gauge is perfect.
..........
I picked mine up from the states for around 70 and it only needs a single 2" hole drilled in the dash
Sounds like the ultimate solution (and source) -thanks Roy. If I still have the boat in a year I'll probably spring for one of these. BTW great website especially that wakeboarding vid.

Finally
Quote:
Originally Posted by Dirk Diggler
No they're not, you've got the choice of euro or american!
Thanks Dirk for pointing that out - great to see someone in the UK sticking up for the poor Euro<YUKYUK>
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Old 19 April 2006, 13:31   #17
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Quote:
Originally Posted by Daniel
OK, OK, but i've never had a yankie boat - and they don't make RIBs i don't think. Would it be fair to assume unless we had an american boat they are all compatable or would we be seeing amerian senders in european tanks and boats?
What has yanks not making ribs got to do with it? I thought we were talking about fuel senders! Especially as you run a merc, you'll most lkely be running an American spec sender, especially if you have smart gauges!. If you have Merc Instruments, or Mariner, or Yamaha, then the instruments will be US spec! Doesn't mean to say that your fuel sender will be the same, but it's unusual for a builder to mix and match!

Out of interest, a US spec fuel sender is commonly referred to as a "240 ohm sender"
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Old 19 April 2006, 13:46   #18
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I was refering to RIBS being built in the UK using euro senders, but yes OK point taken about quicksilver instruments.

The smart gauges can be calibrated which may make them independent of EURO or US senders - or it may not. Someone may know more than me here.
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Old 19 April 2006, 16:15   #19
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Quote:
Originally Posted by Daniel
Someone may know more than me here.
You don't say!
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Old 09 May 2006, 08:18   #20
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Another ebay return.

I see this 'ex dive rib' Osprey Viper is back on Ebay.

Did the fuel sender get sorted?
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