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Aug 18, 2016 8:13 pm
Aug 18, 2016 8:13 pm
Subject: Re: Suitable Spark Plugs for 16/80?
Thanks for all your help everyone. I had already ordered a set of AB6's but will now also order a set of AB5's and see how I get on. As you say I've been reading about plug gaps and didn't realise there's so much to learn. With a magneto you get a weaker spark at slower speeds because the mag isn't producing as much current so a wider gap tends spark erratically at idle speed. A coil ignition is the opposite because at slow speed it gets longer to build up the current so it tends to miss a spark high speeds because the coil is being asked to discharge more frequently. All good fun!
Thanks for all your help everyone. I had already ordered a set of AB6's but will now also order a set of AB5's and see how I get on. As you say I've been reading about plug gaps and didn't realise there's so much to learn. With a magneto you get a weaker spark at slower speeds because the mag isn't producing as much current so a wider gap tends spark erratically at idle speed. A coil ignition is the opposite because at slow speed it gets longer to build up the current so it tends to miss a spark high speeds because the coil is being asked to discharge more frequently. All good fun!