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sizes of gap for spark plugs for morris marina engine
Posted: Fri Dec 11, 2009 11:29 am
by simona1
Hi can anyone tell me what the sizes for morris marina 1275 engine are please on spark plugs and points I have a morris minor but it has a marina engine.
Posted: Fri Dec 11, 2009 11:52 am
by mike.perry
Plugs .025", points .015" More or less standard for A series engines, I'm sure someone will correct me if I'm wrong.
Posted: Fri Dec 11, 2009 2:34 pm
by PSL184
Correct Mike - 1275 is same as 1098 / 948
Posted: Fri Dec 11, 2009 5:49 pm
by bmcecosse
You can try30 thou on the plugs
Posted: Fri Dec 11, 2009 6:19 pm
by PSL184
bmcecosse wrote:You can try30 thou on the plugs
Potential advantages / disadvantages ??
Posted: Fri Dec 11, 2009 6:34 pm
by bmcecosse
Better spark!
Posted: Fri Dec 11, 2009 6:36 pm
by PSL184
Plugs wear out quicker ?
Posted: Fri Dec 11, 2009 6:42 pm
by bmcecosse
No reason why! Only downside - if ignition system is 'marginal' it may not fire up well from cold.
Posted: Fri Dec 11, 2009 8:34 pm
by simona1
Thanks alot everyone all done today seems to be running fine cheers.
Posted: Fri Dec 11, 2009 9:04 pm
by PSL184
bmcecosse wrote:No reason why! Only downside - if ignition system is 'marginal' it may not fire up well from cold.
Good info - I always set mine to .028 as an old boy at work told me years ago when I was doing my apprenticeship - I couldn't remember the reasoning behind it though....
Posted: Fri Dec 11, 2009 10:00 pm
by linearaudio
bmcecosse wrote:No reason why! Only downside - if ignition system is 'marginal' it may not fire up well from cold.
Of course, if you are
sensible and fit an electronic dizzy, then it will happily spark .030" or more, allowing you to run a weaker mixture more reliably, without the constant adjustment of cakky modern contact breakers
Posted: Fri Dec 11, 2009 10:03 pm
by bmcecosse
Acshully - with a decent lectronic ignition - 40 thou would be better!
Posted: Fri Dec 11, 2009 10:08 pm
by linearaudio
bmcecosse wrote:Acshully - with a decent lectronic ignition - 40 thou would be better!
And does the Joe Lucas one fall in that category?
Posted: Fri Dec 11, 2009 10:25 pm
by bmcecosse
No idea - try it! My Lumenition on the TR7 starts and runs happily on 40 thou - Champion plugs though! And it is a ballast system - so full coil volts on starting.
Posted: Sat Dec 12, 2009 5:59 pm
by Alec
Hello all,
the con is that you need to ensure that the leads\cap\rotor arm etc are kept clean and dry as a wider gap means a higher voltage for the system. It shouldn't be a problem given good maintenance.
Alec