Hello again

I have slight progress to report!

After my query on Friday about spark gap I was ready to do some test =
running at the weekend.

I set the gap initally to 0.015" or 0.381mm. Peter Peres recommended a =
gap between 0.3 and 0.6 mm and=20
Bill Colville told me that he used between 0.010" and 0.015". I =
compromised!

With this setting I was getting a fat, healthy spark, so I was hopeful =
of seeing some action.

I ran the engine on glow again to warm it up and to broadly check that =
the mixture was set.
Then the spark gear was refitted and I began flicking. The engine was =
firing every flick but would not continue.
Also, about every fifth flick it seemed to backfire and blow air out of =
the carburrettor.

Now bear in mind that I had the ignition timing at 5 degrees after TDC; =
I thought that I might as well try retarding it a bit
more to try and stop the backfire. I went to 10 degrees after TDC and =
found that the engine would not fire every flick.
Moving to 15 degrees after TDC the engine didn't fire at all.

This is where I left it. I think that I could try leaning the mixture a =
little and having another attempt at 5 degrees after TDC.
I'm running on straight methanol/castor fuel at this stage FYI.
Anyone any ideas on what could be better?

I feel that I'm pretty close to success here and that just a small tweak =
is needed!


PS: Roman, as you can see I did get the sparking going. As yet there's =
no carbon build up. I just had to set the gap correctly and went to an =
extra cell in the ignition battery!

Thanks

Alan=20

Embedded Systems Engineer
Microtima Ltd
Ouseburn Mews
3-7 Stepney Bank
Newcastle upon Tyne
NE1 2PW

Tel: 0191 2304411
Fax: 0191 2304422

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