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General Category => General Discussion => Topic started by: 77gears on April 16, 2018, 07:25:19 AM

Title: 1993 1000S timing question
Post by: 77gears on April 16, 2018, 07:25:19 AM

Good Morning,

I need someone to please verify a timing issue. I am working on a friend's 1993 1000S. All of the parts manuals show ignition points but I guess it was a split year because mine has no distributor.

I assume this means it has a crank sensor and a computer? If so, is there an adjustment for the timing? I just want to be sure.

I appreciate all of your expertise and help.
(http://thumb.ibb.co/m9XVXS/IMG_3002.jpg) (http://ibb.co/m9XVXS)


Many Thanks,
Peter

Title: Re: 1993 1000S timing question
Post by: Murray on April 16, 2018, 07:42:43 AM

Most likely a digiplex (although it could me a motoplat) will have a couple of vacuum tubes in the intake manifolds and a sensor on the flywheel, no there is no adjustment, you can put a timing light on it and make sure its doing what it is supposed too. If the timing does wander its most likely a timing chain on its last legs.

Title: Re: 1993 1000S timing question
Post by: 77gears on April 16, 2018, 08:31:39 AM

You are right... Digiplex with vacuum lines from intakes to it. Great.. thank you.

Question: I was hoping to balance the Dellortos through those intake ports. Do they need to be hooked up at idle ?

I assume they are controlling the vac advance info to the computer box.

Is there a better way to balance the carbs? I would love to use those ports if I could.

Many Thanks,
Peter

Title: Re: 1993 1000S timing question
Post by: guzzisteve on April 16, 2018, 08:58:55 AM

Yes, you are to use the intake manifold ports to balance carbs at idle then at high rpm. There is also a wire to connect coming from the Digiplex box to lower timing about 2* but if it's running well don't worry about it.  I would also clean off the crank sensor, it get's full of metal from clutch area. There is more info on the system in a newer manual like a 95 Sport carb model.

Title: Re: 1993 1000S timing question
Post by: 77gears on April 16, 2018, 10:02:07 AM

Brilliant.. Thank you guys. I will press on  with carbie tuning and sensor cleaning.

Best,
Peter

Title: Re: 1993 1000S timing question
Post by: guzziownr on April 17, 2018, 05:25:00 AM

The aforementioned manual (and many other good things) are found on Greg Bender's website:

http://www.thisoldtractor.com/mg_manuals/workshop_manual_sport-1100_it_en.pdf

Title: Re: 1993 1000S timing question
Post by: 77gears on April 17, 2018, 02:05:57 PM

Awesome.  Thanks so much.
Best,
Pete