Gregory Bender

Voltage regulator cross-references - Magneti Marelli mechanical

Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models

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Updated:

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I extracted some of this information from the old Topica Loopframe_Guzzi news group (which has now moved to Yahoo!).

An aftermarket voltage regulator is available from MG Cycle.

Advance Auto Parts (GP Sorensen): VR203

NOTE: This unit is no longer available.

This is the unit that Keith Ruff installed on his loop during the 2005 National rally in New Cumberland, West Virginia. It works great.

Advance Auto Parts (Niehoff): FF150E

NOTE: This unit is no longer available.

Photo courtesy of Advance Auto Parts.

Auto Zone (Duralast): VR603 or PT804

See Charlie's notes below.

Duralast VR603 or PT804 voltage regulator to fit Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models equipped with a Magneti Marelli charging system.
Duralast VR603 or PT804 voltage regulator to fit Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models equipped with a Magneti Marelli charging system.

Photo courtesy of Auto Zone.

Duralast VR603 or PT804 voltage regulator to fit Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models equipped with a Magneti Marelli charging system.
Duralast VR603 or PT804 voltage regulator to fit Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models equipped with a Magneti Marelli charging system.

Photo courtesy of Auto Zone.

Duralast VR603 or PT804 voltage regulator to fit Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models equipped with a Magneti Marelli charging system.
Duralast VR603 or PT804 voltage regulator to fit Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models equipped with a Magneti Marelli charging system.

Photo courtesy of Auto Zone.

Duralast VR603 or PT804 voltage regulator to fit Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models equipped with a Magneti Marelli charging system.
Duralast VR603 or PT804 voltage regulator to fit Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models equipped with a Magneti Marelli charging system.

Photo courtesy of Wells Vehicle Electronics.

Thanks to Charlie Mullendore of Antietam Classic Cycle for graciously providing me with updated information about the above voltage regulator. In Charlie's own words:

There's been a change in what voltage regulator is offered by Advance Auto Parts. They no longer stock the GP Sorensen VR203 unit. After perusing the Advance Auto Parts website and looking around elsewhere last night, I've come to the same conclusion - the FF150E is really what I want.

Advance Auto Parts shows the Niehoff FF150E on their website, but when you go into the store and ask for that part no. they try to give you a fuel filter. All of the others on their website seem to be unavailable - when the counter person checked they all came up NLA - use Borg-Warner R400Z (which is for alternators!). Could be this is a computer glitch or operator error on the part of the counter person, who knows? Didn't even try ordering the FF150E online - see below.

Called AutoZone - I asked for one for a ‘62 Ford Falcon, they could get a Wells VR603 in one day for $34.99, but I elected to order it on their website since I wouldn't be back into Hagerstown until Monday the 15th. Ordered Monday, arrived Thursday, total cost $42.37 with shipping and tax. Looks identical to the Advance Auto Parts Niehoff FF150E, they're probably all made by the same company. Made in the USA! Wow! 3 month warranty. Installed today and it works great - peaks out at 14.1 volts. Of course, you do have to make a mounting adapter plate, but it wires up exactly the same.

BTW, NAPA and other auto parts stores can get the same thing but charge as much as USD $90.00 for it!

On a side note/related topic: The Ambassador I'm currently working on has a Ford Falcon regulator fitted - it's mounted upside down so that the terminals are at the top instead of underneath. In this orientation, no adapter plate is needed - it bolts directly to the regulator bracket. Wiring reaches okay. It does set lower and may foul the starter relay if one is fitted, but this Ambo never had one and the unused tab on the Ford regulator is where I'm mounting one.

Photo courtesy of Charlie Mullendore, Antietam Classic Cycle.

Vehicle cross-reference

The voltage regulator was used on the following vehicles:

Make & ModelFirst YearLast Year
Ford Club19571962
Ford Club Wagon1962 
Ford Country Sedan19571962
Ford Country Squire19571962
Ford Courier Sedan Delivery19571960
Ford Custom1957 
Ford Custom 30019581960
Ford Del Rio Wagon19571958
Ford Econoline19611964
Ford F Series19561959
Ford F-100 Pickup19601964
Ford F-250 Pickup19601964
Ford F-350 Pickup19601964
Ford Fairlane19571962
Ford Falcon19601962
Ford Falcon Sedan Delivery19611962
Ford Galaxie19591962
Ford Ranch Wagon19571962
Ford Ranchero19571964
Ford Skyliner19571959
Ford Starliner19601961
Ford Sunliner19571962
Ford Thunderbird19571962
Ford Victoria19571962
Lincoln Capri19561959
Lincoln Continental19581960
Lincoln Lincoln Series1960 
Lincoln Mark II19561957
Lincoln Premier19561960
Mercury Colony Park19571962
Mercury Comet19601962
Mercury Commuter19571962
Mercury Country Cruiser19591960
Mercury Medalist1958 
Mercury Meteor19611962
Mercury Montclair19571960
Mercury Monterey19571962
Mercury Park Lane19581959
Mercury Turnpike Cruiser1957 
Mercury Villager1962 
Mercury Voyager19571959