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
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.
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.
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>