still not starting

[Barnsey]

Attempt no 2.  Battery charged up to 7V.  I bypassed the ammeter giving 5.7 V at the coil.

  Tickled the carb,  It overruns again, so a tap with the hammer, to unstick the float. 

   Plug out.  kick over.  Heat the plug with my blow torch.  Plug back in.   Kick.  Not a sausage.  No cough, nothing. 

[rhyatt]

Petrol off
Wide open throttle
Kick to clear flooding ??

[Barnsey]

Okay.  I'll try that, although I'd have thought that kicking it over with the plug out would do the same thing. 

[scifi]

Sorry to hear of the ongoing start problems.  I recently fired up a C15, and my method was as follows...

Tickle until fuel spills from the plunger.
Kick until at the top of the compression stroke, as near tdc as possible, then release the kickstarter to the top.
Twist grip just a bit open... 1/4..
Then Kick down, and continue forward as far as possible, at the bottom of the stroke.

Best of luck, or find a steep hill to bump start it in 3rd or 2nd..

[rhyatt]

My ss80 needs to go just over tdc with the kick start (I use the ammeter to show points open)
And then a good full swing down

[Barnsey]

Good tip about the ammeter. I'll try that.

[V500]

To be fair a C15 shouldn't really need the "big single" starting method, and to kick it over so many times without a cough suggests there's something more wrong than just starting technique.

[Barnsey]

IT LIVES !!!!!

Those last couple of bits of advice did the trick!  It started and ticked over quite happily but weed oil all over the floor.  Luckily it turned out to be just a disconnected return pipe.  I'll fix that later. 

   The other thing I did was to reconnect the ammeter in the reverse polarity so that it shows negative as discharge and positive as charge.  Is there any crazy way in which this might have had an effect? 

  It seems odd that something so simple would have been the fix but I suspect that there were various small things along the way which all had to be right.     Back in the day every lad would have known how to start an old bike but nowadays it seems to be a dark art!

[Barnsey]

We will see if it will start again next weekend!!

[idie]

I know you have a spark but how good is it. Is it being snuffed out under compresion. Get an old spark plug and bend back the side electrode until you have big gap something like 3/8 inch at least the spark should be able to jump that. If it does then your problem is elsewhere.

[Barnsey]

Now that is a good suggestion!  I have a spare spark plug so I will try that out. 

[rhyatt]

At least its running now , you can fiddle with the other bits later
Get used to different ways  it likes to start , each of my bike's have a different technique

[Barnsey]

The saga continues.  Back to not starting today.
I opened the carburetor and had another go at it with the wet and dry to stop the float jamming.
Fresh fuel, charge battery and kick over.  It pops a bit, which I guess is progress, but it didn't start. 
5.4 V on the coil.
Adding a wire direct from battery to coil gives 5.8V on the coil but still no go. 

[Kernowpete2]

Does the coil voltage not seem like a bit of a red herring especiallly as you know you have carb issues and it sounded from previous posts that it might have been getting flooded? What model of carb do you have?

[Barnsey]

I am sure you are right about the electrics. The spark tester indicates a healthy spark anyway.  I am back to using the iridium plug which at least gives a chug.  I got nothing with the BK.

The carburetor is the stock Amal item.  Someone once recommended getting a new one, but the stock Amal costs a packet!  I did try a later carb but it was too big to fit in the space. Any suggestions welcome.

Since my cleaning work the carburettor is no longer flooding. Previously I have  fuel pouring out of the tickler when the float stuck.