***Yes,thats OS No.3,a very popular plug,add this to the above list,sometimes plugs get damaged and the elements squash due to excess fuel in the head,although they still glo they are only working to half capacity,also remember that the life of a glo-plug is between 3-4 hours running time if you are lucky,hot jolts can finish them off in seconds,after this the plugs can break down badly and cause starting problems due to corrosion on the element wire etc,treat them as expensive consumables,some people hang onto glo plugs like a miser ! so just because the plug is new it may still be faulty,always carry a few spares anyway,try another plug.
Also during the run in period,plugs are working extra hard and sometimes blow just like a lightbulb does,ping.
Having said that the manufacturers could easily make a strong sturdy plug that would last for years,but that would be bad for business.
As you can guess my business once revolved around glow engines with the flying school etc and quite often we used to burn a gallon of fuel a day on operations,you get to know the ins and outs pretty quickly when you have a pupil waiting to fly,and the engine will not start ?
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Originally Posted by puregooner the glow plug is brand new which came with the engine.it has "OS A3" written on it |
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