Question about Echo CS400 18" Chain Saw
Pull the kill wire off at the ignition coil - retest for spark , if now spark faultry kill wire or switch indicated
but if no spark fit spark tester in line with h t lead and spark plug
gap tester is basically a piece of wood with 20 mm hole in middle and a hole drilled through to centre from opposing sides
the a nail that fits firmly is pushed through 1 on each side
and meet in the middle of the hole , but the points of ecah nail must align together and be exactly no less than 6.00 mm apart from each other ( place the tester inline between h t lead and plug ) use whater adaption you may need to connect to the saw
and pull the engine over as you would
if all is well the spark should jump across this gap and the gap at the plug while under compression pressure
you will see it in the the tster window
if no spark coil is problem
replace coil and set air gap to 0.010" and refit wires ands covers
cheers hope it helps
Posted on Oct 02, 2010
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Posted on Jan 02, 2017
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