Author Topic: fuel pump is now pumping on my 2000 moto guzzi  (Read 732 times)

Offline troyhamilton

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fuel pump is now pumping on my 2000 moto guzzi
« on: March 11, 2019, 05:32:24 PM »
fuel pump isnt pumping. i tryed jumpimg it. no such luck. looked on ebay theres chinese pumps for 20.00...but i may have one at work. maybe 2 ...
« Last Edit: March 16, 2019, 05:05:52 PM by troyhamilton »
Dr Frankie!
1967 v7, gone
heldorado, gone
1975 850-t gone
1974 850-t gone.
2002 Jackal!
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Online Kiwi_Roy

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #1 on: March 11, 2019, 06:38:14 PM »
Pull out the pump relay and poke a wire in from 30 to 87, you shouldn't need the key on for that.
Make sure the petcock is opening, the pump will struggle if it has to suck through a non working petcock
If you refer to the schematic I attached earlier you will see the jumper will power the pump directly.
If you substitute a 10 Amp meter for the jumper it should draw about 4 Amps if it's spinning freely but significantly higher if the petcock is closed or the filter clogged.
Don't leave the power on if it doesn't spin, it may be gummed up.
Some people report freeing up the pump by squirting carb cleaner into it.

Once you get it to spin it can be left on for a while pumping fuel through the filter and pressure relief valve to circulate back to the pump. It runs 24/7 normally.

Another fault you may get is the commutator covered in varnish insulating the brushes, I have seen that before with a bike sitting for years, there's not a lot you can do but spray in carb cleaner and perhaps a thump on the bench with power on, if you can get it to motor at all it will soon flush itself.

If it's just plain jambed you might try alternating the battery leads to rock it back and forth, let it soak for a couple of days in carb cleaner.
Here's what you are dealing with.

« Last Edit: March 11, 2019, 07:19:03 PM by Kiwi_Roy »
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Offline troyhamilton

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #2 on: March 11, 2019, 07:26:26 PM »
thanks again roy, i just dont have a lot of time and not a lotta cash...i hooked my battery directly to the pump and nothing.
Dr Frankie!
1967 v7, gone
heldorado, gone
1975 850-t gone
1974 850-t gone.
2002 Jackal!
we need a tech section!

Offline fotoguzzi

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #3 on: March 11, 2019, 07:34:03 PM »
Before you buy some China knockoff ..Try flushing it with carb cleaner as suggested above.
2013 Hyperstrada
many Guzzi's loved,  (then sold)
72 Honda Trail 90 my first real motorcycle
 MINNEAPOLIS, MN

Offline troyhamilton

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #4 on: March 11, 2019, 08:27:21 PM »
yeah the china stuff was a joke...i may have a pump at work.
Dr Frankie!
1967 v7, gone
heldorado, gone
1975 850-t gone
1974 850-t gone.
2002 Jackal!
we need a tech section!

Offline nsmith

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #5 on: March 13, 2019, 02:17:10 PM »
I gotta think the pump has a place in the automotive world,with a much cheaper (guzzi content) part number.
Neil formally from South Dakota now living it up in Arkansas

Offline troyhamilton

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #6 on: March 13, 2019, 02:31:51 PM »
maybe someone knows of an allternitive from the auto world! no idea. ill look at work tommorow to see if we have one.
Dr Frankie!
1967 v7, gone
heldorado, gone
1975 850-t gone
1974 850-t gone.
2002 Jackal!
we need a tech section!

Online oldbike54

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #7 on: March 13, 2019, 02:55:18 PM »
 I looked everywhere for a replacement in the automotive world for a cheaper pump , someone did a write up in the old MGNOC newsletter about a pump that would work , no luck actually locating one . The *blue* pump from Quantum for $80.00 was the cheapest I could find , been running it now for about 15K miles with no issues . It is the fairly high pressure required that is the stumbling block with car pumps .

 Dusty
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Offline troyhamilton

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #8 on: March 13, 2019, 03:40:36 PM »
yeah i hate thinking of using a chinese pump. hopefully i can find one at work.
if not ill try to revive mine.
Dr Frankie!
1967 v7, gone
heldorado, gone
1975 850-t gone
1974 850-t gone.
2002 Jackal!
we need a tech section!

Offline guzzisteve

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #9 on: March 13, 2019, 05:48:20 PM »
Here is an original Bosch that came on our bikes, CHEAP ENOUGH?

https://www.amazon.com/Bosch-0580464048-Electric-Fuel-Pump/dp/B000CEZQ94
"Pray through Carlo & your bike shall be healed"
Location: Planet Earth

Offline steven c

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #10 on: March 13, 2019, 06:11:28 PM »
 I'm having the same issue with a 98 EV that has been off the road for 8 years. So thank you for the info and links.Thats why this forum is a great resource . I have been pouring Sea Foam into the fuel line so far nothing. Carb cleaner next.
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Online Kiwi_Roy

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #11 on: March 14, 2019, 08:36:55 AM »
thanks again roy, i just dont have a lot of time and not a lotta cash...i hooked my battery directly to the pump and nothing.

This is pretty typical of a pump that's been sitting for a few years, I think the fuel inside evaporates to leave a layer of varnish on the commutator insulating the brushes (did it draw any current at all, spark when you touched the battery to the terminals?)
If you look at the pump drawing I posted the only way to get solvent inside is through the inlet. If you stand it on end and fill the pump with carb cleaner it just might break down the varnish enough to get some current flow then you could try rocking it back and forth by reversing the leads.

I bought an old Flying Brick in New Zealand it had a similar problem and my Bro KiwiKev managed to get it spinning again, never looked back.
72 Eldorado
07 Griso 1100
17 V7iii Special

Moto Guzzi - making electricians out of riders since 1921

Online flower_king001

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #12 on: March 14, 2019, 08:57:21 AM »
I'm having the same issue with a 98 EV that has been off the road for 8 years. So thank you for the info and links.Thats why this forum is a great resource . I have been pouring Sea Foam into the fuel line so far nothing. Carb cleaner next.

http://www.mgcycle.com/index.php?main_page=product_info&cPath=30&products_id=2491

$56 thru MGCycle

1971 BMW R90/5
1986 Moto Guzzi Lemans IV
1996 Cali i 1100
1998 Moto Guzzi EV
2007 Moto Guzzi Breva 1100

Offline troyhamilton

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #13 on: March 14, 2019, 04:51:51 PM »
we had one at work. boss gave it to me! but i work my tail off lol.
Dr Frankie!
1967 v7, gone
heldorado, gone
1975 850-t gone
1974 850-t gone.
2002 Jackal!
we need a tech section!

Offline Charles in Lake Charles

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Offline troyhamilton

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #15 on: March 14, 2019, 06:37:18 PM »
I did see that. no i got a bosch from a box of guzzi parts my boss had for years. it runs
Dr Frankie!
1967 v7, gone
heldorado, gone
1975 850-t gone
1974 850-t gone.
2002 Jackal!
we need a tech section!

Offline MattP

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Re: fuel pump isnt pumping on my 2002 moto guzzi
« Reply #16 on: March 15, 2019, 12:58:56 PM »
Troy I got a used pump from a bmw $15.00 free shipping one year warrenty. Still working fine. Same part no ect took at least 10 min to replace. Used car parts . com I think If any body wants my old one let me know free worked fine but leaked at crimped end . O ring I think. O 95 call external.      Matt

Offline steven c

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77 850 LeMan's
74 Eldorado
98 EV1100

78 Robin Moped-2
2006 Buell Ulysses
75 F7 175 Kawasaki
88 XT350
MGNOC 6412

Offline troyhamilton

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Re: fuel pump isnt pumping on my 2000 moto guzzi
« Reply #18 on: March 15, 2019, 02:44:21 PM »
i got another at work. lucky me. real bosch moto guzzi.
Dr Frankie!
1967 v7, gone
heldorado, gone
1975 850-t gone
1974 850-t gone.
2002 Jackal!
we need a tech section!

Offline troyhamilton

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Re: fuel pump isnt pumping on my 2000 moto guzzi
« Reply #19 on: March 16, 2019, 05:05:15 PM »
and now its pumping...had leaks. couldnt get it ti run. getting spark at least. now to get it all figured out, not like my old gravity fed bikes!
Dr Frankie!
1967 v7, gone
heldorado, gone
1975 850-t gone
1974 850-t gone.
2002 Jackal!
we need a tech section!

 


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