marelli box failing

discussions specific to the 750 Paso

Moderators: paso750, jcslocum

Post Reply
User avatar
higgy
paso grand pooh-bah
Posts: 3378
Joined: Tue Jul 29, 2008 9:50 pm
model: 907 I.E.
year: 1992
Location: Hilltown,Pennsylvania
Contact:
Contact higgy

Re: marelli box failing

Post by higgy »

Two things come to mind

1 check the connections at the bottom of the ignition switch. Take it off and make sure each terminal is tight and that the gang connector is not melted
Image

If it looks like this you will need to take it apart and trim the melted plastic away and replace the terminal
On my 906 it was so bad I had to replace the switch as well,details on how to do it are in the FAQ I would also suggest you wire the headlights directly to the battery if you have not done so already,it will help prolong the life of this hard to find part :beer: :beer: :thumbup:

I have found this to often be the root cause of the infamous hiccup while cruising

2 check the secondary ignition and pay attention to the routing looking for gray discoloration anywhere they contact the frame
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
Electrocuted Birds Are Bursting Into Flames and Starting Wildfires :roll:
88 750
90 906
92 907ie
Top
angelix
Posts: 338
Joined: Thu Nov 29, 2007 2:38 am
model: 907 I.E.
year: 1990
Location: UK

Re: marelli box failing

Post by angelix »

higgy wrote:Two things come to mind

.......
I have found this to often be the root cause of the infamous hiccup while cruising
On my P750 i had the Marelli "popping" because of the ignition switch.

the bike had the hiccup until it just died; unfortunately I found the cause too late and I guess the Marelli probably died because of it.

i my case i found the issue was internally to the switch and I was able to fix it, but the Marelli needed to be replaced.
Top
User avatar
higgy
paso grand pooh-bah
Posts: 3378
Joined: Tue Jul 29, 2008 9:50 pm
model: 907 I.E.
year: 1992
Location: Hilltown,Pennsylvania
Contact:
Contact higgy

Re: marelli box failing

Post by higgy »

i my case i found the issue was internally to the switch and I was able to fix it, but the Marelli needed to be replaced.

Yes, The heat from the draw of the headlights will fry the whole thing eventually. It is wise to remove the load from the switch and move it to a proper relay. You can still use the switch to activate the relay if you like :thumbup: Relays are cheap and easy to find and replace. Paso Ignition Switches are not.
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
Electrocuted Birds Are Bursting Into Flames and Starting Wildfires :roll:
88 750
90 906
92 907ie
Top
bobst2
Posts: 192
Joined: Sun Jul 24, 2011 1:57 pm
model: 750 Paso
year: 1988
Location: delta b.c. canada

Re: marelli box failing

Post by bobst2 »

thanks for the info .i will pull the switch and check it out.i ordered a new left bar control switch that has a headlight off switch. i will do the relay then for now i will just leave it unpluged. i have not done the coil rewire yet but i am going to start
prob,tonight.

they should have zippers not body panel screws lol.
Top
User avatar
higgy
paso grand pooh-bah
Posts: 3378
Joined: Tue Jul 29, 2008 9:50 pm
model: 907 I.E.
year: 1992
Location: Hilltown,Pennsylvania
Contact:
Contact higgy

Re: marelli box failing

Post by higgy »

Hey Bob
How did you make out with this ?
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
Electrocuted Birds Are Bursting Into Flames and Starting Wildfires :roll:
88 750
90 906
92 907ie
Top
bobst2
Posts: 192
Joined: Sun Jul 24, 2011 1:57 pm
model: 750 Paso
year: 1988
Location: delta b.c. canada

Re: marelli box failing

Post by bobst2 »

got busy at work will not be able to start project till sunday
Top
Post Reply

Return to “750 Paso”