[Healeys] 100 generator pulley diameter

[Hank Leach]

Guys-there are any number of aftermarket or rebuilt generators over
the years. Good chance that someone jazzed up the generator to get
more output by changing the size of the pulley. I think that was the
case with mine, as the car was raced, so electrical output was
important.
I will look up the generator parts in the Lucas charts, but more than
likely there is no mention of diameter size. Hank

	-----------------------------------------From: "Mark Donaldson" 
To: "Michael Salter"
Cc: "Hank Leach", "Healey List"
Sent: Sunday July 9 2023 8:57:14PM
Subject: RE: [Healeys] 100 generator pulley diameter

	FROM: Michael Salter 
SENT: Monday, 10 July 2023 3:13 PM
TO: Mark Donaldson 
CC: Hank Leach ; Healey List 
SUBJECT: Re: [Healeys] 100 generator pulley diameter  

	There is only 1 part number for all 100 generator pulleys so pretty
unlikely that there were different diameters.   Agreed 1B 1727  

	Lots of exchange generators back in the day.  The car was imported to
NZ in 1964. Surely a generator wouldn’t have packed up in just 8
years? 

	My BN2 which is very close to yours has only 27K miles and the
generator date is correct 5 /56.   

	What is the date on yours?  11 55 . . . and number 22483A, which is
correct for a BN2   

	M 

	I realise one cannot always make an accurate measurement from a
photo, but this Moss repro pulley looks, to my eye, to be more than
3.25” OD 

	Now I am totally confused. 

	On Sun., Jul. 9, 2023, 10:20 p.m. Mark Donaldson,  wrote:     

	Hank and Michael, 

	Thanks for your replies. 

	Now I am curious. I am 99.9% sure my generator pulley is original.
The car was sold new in Guernsey in the Channel Islands.  

	It is BN2 232844 11 June 1956 and the engine has never been out of
the car, though I gave the generator a tidy-up 10 years ago. 

	As Hank points out, it is possible that various diameters may have
been interchanged with other models during 100 production. 

	So our local Auckland member with a 3” OD pulley may well have the
right one for his 1955 BN1 

	Michael, I’ll have him measure it again to see if in fact it is a
3.2” pulley . . . and not 3” 

	 QUESTION:  Might my 3½” OD pulley be correct for a late
production BN2? 

	Mark 

	Ardmore 

	NZ 

	FROM: Hank Leach 
SENT: Monday, 10 July 2023 5:22 AM
TO: 'Mark Donaldson' 
CC: 'Healey List' 
SUBJECT: Re: [Healeys] 100 generator pulley diameter   

	Hi Mark-had a similar problem with my early 100. The pulley mounted
to the generator turned out to be the wrong one and the belt lineup
was askew. The correct one shown is I believe about 3.25" and runs
true. Since there were so many of these blocks used on A70, A90 and
other saloons of the period, I could see how they got mixed up.
Regards, Hank 

	----------------------------------------- 

	From: "Mark Donaldson"
 To: "Healey List"
 Cc:
 Sent: Sunday July 9 2023 3:41:39AM
 Subject: [Healeys] 100 generator pulley diameter  

	Learned gentlemen, 

	The pulley on my 1956 BN2 is 3½” diameter. I believe it to be
original. I’ve owned the car for 45 years. 

	A friend has a BN1 with a pulley diameter of just 3”. He thinks it
is original. I don’t. It got me thinking. 

	I believe his is incorrect as it was converted here in NZ from a LHD
import some 30 years ago. BN1L 226180 

	The car has some clumsy conversions made to change it to RHD, so I
don’t know what else might have been ‘cobbled up’ to get the car
on the road. 

	Can somebody of you please confirm that 3½” is correct. 

	That said, I need another for a second 100 engine I am building as a
spare. 

	They seem to be scarce down here in NZ, and repros seem to be rather
expensive. 

	Fingers crossed. 

	Mark 

	Ardmore 

	NZ
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