Carl:
The 41491 distributer you have is correct for the low comp. Fed.73 MGB.
The O.E. part number for the vacuum advance unit is 37H7837 Lcs 54425359,
not RTC1425.
RTC1425 is the vacuum unit for a UK 71-74 MGB. This is a common problem
where a supplier relies on UK derived cataloging.
Characteristics:
54411969 5-12-8 Suitable for ported vacuum pickup
54425359 10-15-5 Suitable for manifold vacuum pickup
Begin ins HG - End ins HG - degrees of advance.
The unit you were sold may aggravate detonation if installed on the
original distributor and connected to the manifold.
Sorry to be a bringer of bad news, your suggestion to buy a new o
ring was a very good one.
Also set aside some time to straighten the dist. hold down clamp.
Most are in poor shape. Oh, and don't forget to check for a cracked dist.
body before buying anything. They tend to crack where the hold down clamps
them. Do not overtighten the clamp!!
Kelvin.
> -----Original Message-----
> From: Carl Elliott [mailto:grunt2@adelphia.net]
> Sent: Friday, January 15, 1999 11:42 AM
> To: Grstnprts@aol.com; wizardz@amdyne.net; mgs@autox.team.net
> Subject: Re: 41491 distributor - 54425359 vac advance unit
>
>
> My dist is a 41491 A it is for the low compression motor a
> 73 BGT, and
> the vac advance is a # 5441969 its a Lucas replacement, for the low
> compression engine.
> Can't tell the degree swing ,But it works well and has a great deal of
> travel when Vacuum is applied . I hope this will help.
> Its Part # RTC
> 1425 and the price was $38.45 from the Proper MG
> 800-711-3368 the
> O-ring is #513682 for $.55
> If you remove the dist, why not replace the O- ring also.. Carl E.
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