Using the replacement of a slit fuel line inside the tank as an excuse (see earlier write up on "Fuel pump assembly:submersible fuel lines"), I decided to pre-emptively change pretty much all parts still available to order that make up the fuel pump assembly. To save you some pennies should you go down that route (and as can be seen by the pictures below), when ordering a fuel pump from the factory for hefty 215 quid (Ducati part number 43040041A) what you receive is a Bosch fuel pump that retails for 55 quid (Bosch part number 0580453408). The difference of 160 quid is nothing more than Ducati premium tax. The fuel level sensor (old part number 59210073B and new part number 59210141A) now comes with a metal fuel sender nut from the factory (was plastic and prone to cracking and leaks).
Very timely and useful for me. I've been struggling with an intermittent fault where the bike rides fine but if you go anywhere for more than an hour when you turn it off then the pump wont run for 3-4 hours. We've been checking relays and tracing wires, turns out the previous owner has installed the filter backwards and its causing the pump to struggle and we think overheat or just wear out. Looks like a new pump, filter and o ring are now needed. Thanks for the info.
previous owner here - that was dumb if it was me. did i change it in my ownership? ive done a few so thats just really silly if it was me.
Don't know when it was done, doesn't matter really. Its an easy fix. Like most intermittent faults I'm just glad to have found the cause, otherwise you just never know and end up loosing trust in the bike. for peace of mind ill change the pump but it could just need a filter change.
Since I've had the bike it has always made a high pitch whine when I first prime the pump; but if you prime it twice it is quieter and always starts, have ordered new filter, pump and O-ring so should be sorted now.
They look to be all ok, but given the problems others have had I'm going to change them out for the ethanol rated SAEj30R10 spec hoses.
Its an odd noise, doesn't sound like it should be like that though. The pump is fully submerged and cant really lose its prime so i wonder what the cause is.
If pumps didn't lose their primed condition they wouldn't need to prime for 2 seconds when you turn the ignition on. The pump leaks internally when not running and the system loses pressure over a period of time. Submersed or not makes no difference to that.
All fuel pump assembly hoses that came from the factory with my recent order were SAE J30 R9 rated which was quite disappointing, since my understanding is that these are not designed to be submerged in fuel (but to withstand fuel running through them). Ended up ordering from another vendor the Gates Submersible 8mm SAE 30R10 which seems to be the better (and more expensive, must be said) choice.
