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Dead Parrot · 03-31-2021, 12:06 AM

2nd plug from left in pic, top, looks to have a very narrow gap. Possible that is where your misfire came from. Especially if a piece of carbon lodged in the gap during the fight with the wind.

IMO - 1st step is replace points, cap, wires, and plugs. Worn points can cause a misfire.

2nd thoughts on valve seals. If original, very likely they are worn/cracked from age.

Might be worth it to pull the heads and inspect the valves. Pre 75 heads/valves were setup for leaded fuel. Later heads and valves were a bit different to deal with unleaded fuel.

03-31-2021, 12:06 AM	#6
Dead Parrot Registered User Join Date: Aug 2012 Location: Oklahoma City, OK Posts: 2,489	Re: misfiring after losing fight to high speed winds - Spark plug troubleshooting ple 2nd plug from left in pic, top, looks to have a very narrow gap. Possible that is where your misfire came from. Especially if a piece of carbon lodged in the gap during the fight with the wind. IMO - 1st step is replace points, cap, wires, and plugs. Worn points can cause a misfire. 2nd thoughts on valve seals. If original, very likely they are worn/cracked from age. Might be worth it to pull the heads and inspect the valves. Pre 75 heads/valves were setup for leaded fuel. Later heads and valves were a bit different to deal with unleaded fuel.