Need fuel sending unit

Hello, new to the forum, I just acquired a 2002 600 silverwing with flooding problems so I changed the fuel pressure regulator and it runs like new but i I noticed the guage was flashing one bar even though I filled it up so I took the fuel pump assembly out to check the sending unit and “suprise” it don’t have one. So I assume it had a problem and someone just left it out. What are the chances of finding just the unit even used would be good. Having been a mechanic all my life I am pretty good at improvising, anybody tried this. The bike has sat a lot, it only has a little over 4000 miles on it but the tank is clean inside so I guess it just gummed up the sending unit.

Welcome aboard the board eli.  A fuel sensor is a pretty rare topic of discussion on this board ... usually because there are very few issues with them.  I'd suggest eBay for used or of course, your Honda dealer for new would be your best best.

Hmm… If all you are missing is the sending unit resistor, wiping arm, float arm and float you might consider adapting those electrical parts from a Reflex (NSS250).

At less than $50 and assuming that those two Reflex items fit your existing Silverwing pump body support (which they probably will), you’d have to remove the sending unit resistor from the Reflex assembly and solder the wires to the Silverwing pump cover terminals. It would then only require fabricating a properly configured float arm. The Reflex float arm is not the same as the Silverwing. However the resistor wiping arm probably is.

Since the Reflex predated the Silverwing it’s a good possibility that Honda utilized off-the-shelf components to adapt to the Silverwing design. Highly doubtful that they designed a special fuel sending resistor & wiping arm to use on their “new” Silverwing fuel level sending unit.

If you are willing to take that $50 risk I can give you the measurements (and photos) of the Silverwing float arm.

i have a couple of complete tank sender units in uk they are on ebay uk think priced at £40 each

Cosmic-jumper I would appreciate those measurements and pictures, thanks

Photos and measurements sent. Please let us know how you get on with this.

Hopefully you’ll give the tank itself a good cleaning. Chances are that the bike had been stored for a long period with half a tankful and that fuel deteriorated and left the pump & sending unit a ball of varnish and rust. When the previous low life bast’d owner discovered that he did a quick ‘n dirty by removing the sending unit then selling off the bike.

So the moral is, don’t store the bike with less than a full tank. Preferably store the bike with non-ethanol fuel.

If things don’t work out, I might be persuaded to part with this pump I have.

Siataukreg wrote:

i have a couple of complete tank sender units in uk they are on ebay uk think priced at £40 each

Can I have the link to this? I'm also experiencing a faulty fuel tank sensor as well. Blinking 1 bar fuel gauge even after topping up to full tank.

dovahkiin wrote:

Can I have the link to this? I'm also experiencing a faulty fuel tank sensor as well. Blinking 1 bar fuel gauge even after topping up to full tank.

Wait!  Before you rush off and go to the expense and aggravation of replacing the fuel pump assembly, please use the Search window. We’ve had quite a few discussions here about fuel gauge problems. 99% of those problems are caused by a “contaminated” fuel gauge sending unit.

Do a Search for Fuel Gauge Mystery, Fuel Gauge Mystery Follow Up, and Techron.

Those discussions, and others, will shed light on your issue as well as offer a possible solution.

Search is your friend.

Cosmic_Jumper wrote:

dovahkiin wrote:

Can I have the link to this? I'm also experiencing a faulty fuel tank sensor as well. Blinking 1 bar fuel gauge even after topping up to full tank.

Wait!  Before you rush off and go to the expense and aggravation of replacing the fuel pump assembly, please use the Search window. We’ve had quite a few discussions here about fuel gauge problems. 99% of those problems are caused by a “contaminated” fuel gauge sending unit.

Do a Search for Fuel Gauge Mystery, Fuel Gauge Mystery Follow Up, and Techron.

Those discussions, and others, will shed light on your issue as well as offer a possible solution.

Search is your friend.

Yes! I've been lurking and have already seen those posts.

Regarding the Techron, I've used STP Complete Fuel System Cleaner. It's more readily available where I'm from and it has the same type of detergents in the Seafoam that's been recommended on the forum.

However, I've dumped half of the stuff in and ran it for about 200km. No change. But I just pumped petrol again and dumped the other half in. Hopefully it clears up whatever's messing with the fuel sensor!

dovahkiin wrote:

Siataukreg wrote:

i have a couple of complete tank sender units in uk they are on ebay uk think priced at £40 each

Can I have the link to this? I'm also experiencing a faulty fuel tank sensor as well. Blinking 1 bar fuel gauge even after topping up to full tank.

https://www.ebay.co.uk/itm/203838338969

Thanks cosmic-jumper for your help, I was able to get a sending unit reasonably, however the range on resistance was too broad. I was able to get it up close to the 42 ohms but too much on the high side, installed it anyway at least it reads full when full but drops to e at about 1/2 tank but I can live with that. Just keep up with the milage, at least the e bar is not flashing all the time.