Search found 61 matches

by Michael Barclay
Thu Sep 17, 2020 8:37 pm
Forum: MGB Technical
Topic: 123 ignition
Replies: 17
Views: 719

Re: 123 ignition

Hi Vic The 123 installation manual shows connecting the red 12 volt feed from the distributor to the positive terminal of the coil. If you follow this instruction on a rubber bumper car the distributor will only be supplied with 6 volts. As you suggest a separate 12v feed from the fuse box will be r...
by Michael Barclay
Thu Sep 17, 2020 8:30 am
Forum: MGB Technical
Topic: 123 ignition
Replies: 17
Views: 719

Re: 123 ignition

Hello Stephen Could the problem be with the voltage being supplied to the 123 Ignition? Your car would originally have been fitted with a 6 Volt ignition system using a 6 volt coil and a ballast resistor built into the loom. This resistor is bypassed when the starter motor is engaged to provide 12 v...
by Michael Barclay
Mon Jul 20, 2020 7:39 am
Forum: MGB General
Topic: Engine numbers
Replies: 7
Views: 1672

Re: Engine numbers

Hello Malcolm
Forgot to add that 582F also indicates overdrive was fitted when it left the factory.
Best regards
Mike Barclay
by Michael Barclay
Sat Jul 18, 2020 7:35 pm
Forum: MGB General
Topic: Engine numbers
Replies: 7
Views: 1672

Re: Engine numbers

Hello Malcolm I’ ll try and help with the explanation of your engine number plate. 18V - 1800CC Vertical in line. 582 - Engine type and correct for a 1973 car. F -Twin carbs and crank venting. H - High compression 19843 – Engine serial No So your engine matches your log book. Hope this helps. Mike B...
by Michael Barclay
Sat Jul 04, 2020 5:02 pm
Forum: MGB Technical
Topic: Gearbox Oil Change 1974 MGB
Replies: 7
Views: 1751

Re: Gearbox Oil Change 1974 MGB

Hello Tim Unless you were having problems engaging the overdrive prior to the oil change do not be tempted to remove the Pump or Valve.(both under the filter plate). They can be tricky to refit correctly and there is a chance your overdrive will not work properly once back together. Leave well alone...
by Michael Barclay
Sat Jul 04, 2020 4:54 pm
Forum: MGB Technical
Topic: Rear heated window relay
Replies: 10
Views: 1861

Re: Rear heated window relay

Hi Guys
I think i should qualify my previous comment. Charles is of couse correct in stating a HRW relay was fitted to later cars . However the question concerned a 75 car. Ido not think the relay was fitted until 76 onwards . Maybe Peter can let us know.
Best regards
Mike Barclay
by Michael Barclay
Fri Jul 03, 2020 9:12 pm
Forum: MGB Technical
Topic: Rear heated window relay
Replies: 10
Views: 1861

Re: Rear heated window relay

Hi Paul There is no relay for the rear screen on the GT. Its a design flaw and the reason why there is such a huge volts drop at the screen due to the high drawn by the screen. I would recommend fitting a relay to over come this problem and help protect the aging wiring and switch gear. Easy to do.F...
by Michael Barclay
Fri Jul 03, 2020 8:58 am
Forum: MGB Technical
Topic: Gearbox Oil Change 1974 MGB
Replies: 7
Views: 1751

Re: Gearbox Oil Change 1974 MGB

Hello Tim Having done this job recently on my 74 B I would add the following to already good advice. The dip stick is a real pain to get to and remove on the the gearbox. when you eventualy do get it out, tie a loop of thick sting to the dipstick. It will make retrieving it a lot easier. Before you ...
by Michael Barclay
Fri Jul 03, 2020 8:41 am
Forum: MGB Technical
Topic: 78 MG B GT...Running Rich?
Replies: 16
Views: 2872

Re: 78 MG B GT...Running Rich?

Hello Nathan Glad you are getting to the bottom of the problems.Just to be clear it is probably the float needle , not the float that may not be seating properly causing the flaot chamberto flood. This happened to me last year and my car would not tick over , plus it wasnt goood for fuel consumption...
by Michael Barclay
Thu Jul 02, 2020 10:04 am
Forum: MGB Technical
Topic: 78 MG B GT...Running Rich?
Replies: 16
Views: 2872

Re: 78 MG B GT...Running Rich?

Hello Nathan A couple of other quick checks that might help. Check the choke is fully closed at the carb end. The cable can seize up or become stiff and although the choke control may be fully home at the dash end could still be open at the carb end. Check the oil level in the dash pots. Unscrew the...