Hello again,<br />I took my boat out today to decarbonize the engine and while running the boat at half throttle to warm up the engine, the engine was stuttering like it wanted to shut off. It starts fine and idles fine - but only at mid throttle it will bog down for a few seconds and then return to normal. <br />I did the decarbonizing procedure anyway and the problem is still there. In my driveway I removed each plugwire at a time to check for current by putting a screwdriver into the plugwire and grounding it off around a centimetre from the spark plug to look for spark. The two top plugs spark a distance of one centimetre and the bottom plug sparks around two centimetres away from the spark plug. <br />Bottom line is the bottom plugwire (Number 3 Sparkplug) gives out more current/voltage than Number 1 & Number 2. <br />I cleaned the distributor terminals and the points, I cleaned the plugs and gave them a gap of 40 . I am using Champion L82C sparkplugs. <br />When in neutral I rev the engine and it backfires when I release the throttle and then shuts off. Possibilities:<br />- I have a new Niehoff pro-power coil from a 1984 Chrysler Reliant. Would this work to correct the problem with Number 1 & Number 2 plugwires?<br />- Regapping the points?<br />Any other suggestions?
