The carbs should have an aluminium tag under one of the dashpot securing
screws.
Nearly all the exchange engines always have a 48G prefix, 737 covers the
engine numbers either side of yours, the only differences are the latest 18V
engines which have BHM prefixes.
In the text Clausager says that "if an 18V engine is found in an MGB with a
three-digit number NOT listed in this book, it will be from either a Marina
or a Sherpa".
Cheers,
PaulH.
-----Original Message-----
From: Jones, Mark <MJones@ngl.ca>
To: 'Paul Hunt' <paul.hunt1@virgin.net>; mgs@autox.team.net
<mgs@autox.team.net>
Date: 18 February 1999 13:17
Subject: RE: MGB Engine Numbers
>I have gone through Clausager myself and like you can't find any reference
>to 658M either. I do have two SU carbs, but I haven't checked them to find
>a model number (where would I look?) and I do have the proper emission
>controls for my build date which really makes me wonder about the M. Could
>it be a factory reconditioned engine. If I recall correctly reconditioned
>engines had a different type of engine number signifying them as being
>factory reconditioned.
>
>Mark
>
>> -----Original Message-----
>> From: Paul Hunt [SMTP:paul.hunt1@virgin.net]
>> Sent: Wednesday, February 17, 1999 3:28 PM
>> To: Jones, Mark; mgs@autox.team.net
>> Subject: Re: MGB Engine Numbers
>>
>> Clausager has a comprehensive listing of engine numbers over the years
and
>> your prefix doesn't figure, they jump from 585-Z-L to 672-Z-L (Aug 71 -
>> Aug
>> 72, Aug 72 - Sep 74, Z meaning two carbs and emissions control, NA only,
>> 'L'
>> for low compression. If it is engine from another application it is
>> curious
>> that it seems to be the correct age. Maybe Clausager missed something.
>> Incidentally, 'M' doesn't figure in any number for any year.
>>
>> PaulH.
>>
>> -----Original Message-----
>> From: Jones, Mark <MJones@ngl.ca>
>> To: 'mgs@autox.team.net' <mgs@autox.team.net>
>> Date: 15 February 1999 13:56
>> Subject: Re: MGB Engine Numbers
>>
>>
>> >Okay with all this talk about engine numbers I have got to ask about
>> mine:
>> >18V658M-L17025. The engine is in a 1973 GT build date: 02-73. What I
>> can't
>> >figure out is what does 658M stand for. Any help would be appreciated.
>> >
>> >Mark
>> >
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