Author Topic: C15 timing  (Read 596 times)

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TIGERJ

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C15 timing
« on: 05 August, 2017, 06:34:28 »
After much help and advice from members thanks again I am getting there with the carb. settings.
Decided to recheck ignition timing.
The adjusting plate is in fully advanced position BUT spark still needs advancing.
I am guessing distributor needs reposition on crank.
Can this be done without removing the gearbox outer cover.
Regards
           Tim

DEAN SOUTHALL

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Re: C15 timing
« Reply #1 on: 05 August, 2017, 08:04:30 »
The procedure is set put in the BSA service sheet. A full set for download is here:-

http://www.bsaunitsingles.com/Archives/Owners_Manuals/C15%20&%20B40%20Service%20Sheets%20Book%2000-4082%20x.pdf

TIGERJ

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Re: C15 timing
« Reply #2 on: 05 August, 2017, 10:37:10 »
Thanks Dean
                   Not sure if the procedure is the same for points on the side engine,which I have.
                    I may have misled you you by referring to the distributor.
However service sheets very useful, thanks.

JulianS

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Re: C15 timing
« Reply #3 on: 05 August, 2017, 11:01:52 »
The auto advance/cam behind the points plate is fitted in a taper and can be removed and repositioned.

TIGERJ

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Re: C15 timing
« Reply #4 on: 05 August, 2017, 14:38:20 »
Thanks Julian
I will try to find a way to exert a pull to the plate.
Without removing the g/box cover

JulianS

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Re: C15 timing
« Reply #5 on: 05 August, 2017, 15:15:09 »
The points mounting plate should come away when you undo the 2 fixings, exposing the auto advance unit. Loosen the centre bolt but dont fully remove it and if you carefully tap to one side you will free unit from the taper and allow it to be removed. Hit it too hard you will bend the bolt.

There is special tool, an extractor bolt to do the job.

TIGERJ

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Re: C15 timing
« Reply #6 on: 05 August, 2017, 17:14:52 »
Thanks Julian.
Will give it a try.

DEAN SOUTHALL

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Re: C15 timing
« Reply #7 on: 05 August, 2017, 19:37:35 »
Thanks Dean
                   Not sure if the procedure is the same for points on the side engine,which I have.
                    I may have misled you you by referring to the distributor.
However service sheets very useful, thanks.

I thought both were covered in the sheets.

TIGERJ

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Re: C15 timing
« Reply #8 on: 08 August, 2017, 18:16:27 »
Julian
Your method for timing plate worked a treat!!
Thanks
Is it refitted  with a firm hammer tap ?

JulianS

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Re: C15 timing
« Reply #9 on: 08 August, 2017, 18:21:33 »
I would just tighten the bolt.

TIGERJ

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Re: C15 timing
« Reply #10 on: 12 August, 2017, 06:30:51 »
Having mega problems getting the timing set.
I notice springs are slack on distributor plate.
Any idea where you can buy a set.
Or are loose springs OK ?
Regards
            Tim

TIGERJ

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Re: C15 timing
« Reply #11 on: 12 August, 2017, 20:13:44 »
Reset the ignition timing.
But still running very poor.
Starts first or second kick but will not pull or rev
Running out of ideas.
Not sure what to try next
Boo Hoo
Tim


JulianS

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Re: C15 timing
« Reply #12 on: 13 August, 2017, 09:59:31 »
The springs need to be strong hold the auto advance unit in the fully retarded position when engine at rest. Slack no good.

TIGERJ

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Re: C15 timing
« Reply #13 on: 13 August, 2017, 17:38:26 »
Any idea where I can get some ?
Springs that is.

TIGERJ

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Re: C15 timing
« Reply #14 on: 13 August, 2017, 17:47:55 »
Dean Just had a good read of the service sheets(thanks again)
You are quite correct they do cover all types of distributor.
The potential good news according to the info on sheets I have used the in correct advance
SHOULD BE
0.280 " before TDC
NOT 0.125" stated in the Haynes manual.
Let's see if this helps
Fingers crossed
Regards
           Tim