Kevin

Update, looks like a weak spark on #6 instead of no spark. Changed test light and can now see a faint spark on #6.

What is it they say? Misery loves company! You did put a thought in my head and I called him to put the rotor over the firing position for #6 and then test the cable attached to the plug. When I tested the cables they were likely off that position.

planesmaker; Switched with other wires from another cylinder to eliminate a cable problem. Tested the leads from the distributor still attached to the plugs for ground and they test clean.

It really is an odd problem considering the redundancy. The spark was tested using an inline test light between the wire and the plug. Not getting a spark on #6 only from the same rotor position on both distributors. I read someone had the same problem with #1 and he got it going after replacing both coils. Here's a link to the conversation Jabiru Owners Group • View topic - Rotor Arms

Yes, I wrote to them yesterday and I am awaiting their response. I don't know if this could be timing related, it's fixed and not adjustable. The engine was said to be tested at the factory so I can only assume they would have caught the problem there prior to shipping it.

When he started the engine for the first time it was running rough but that was due to the one cylinder not firing. The problem seems to be before the distributors because we switched wires on the distributors and there is no spark present. The magnets appear fine, gap is good on the coils, wires test ok . Just an odd trouble when we have two coils and two distributors with no spark on the same position.

If the wires were on the wrong terminals would there not still be a spark generated through the coils? The firing sequence would be incorrect but I am guessing a spark would be present at one or both plugs.

Hi folks, just joined to help a friend with a new Jabiru that doesn't have spark from either coil on one of six cylinders. All other cylinders are fine. Any ideas on what could be causing this? Thanks.