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Old 08 February 2026, 12:50   #1
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Country: UK - England
Town: Ryde
Boat name: Gringo
Make: Orkney
Length: 5m +
Engine: Mercury 50hp thunder
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Mercury thunderbolt

Thanks for the Add
I have a Mercury 50hp thunderbolt 1978
Looking for a switch box to get my engine working again.
Part number 333-3213A3
4 pole only
Red,Blue,White &Green
A very strange cdi because it's a lightning Ignition with no trigger wires just 2 yellow running to the rectify.
Any help gratefully appreciated.
Kenneth Higham
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Old 08 February 2026, 22:25   #2
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Suspect you’re going to need to order from the US and pay the tax too. A few second hand around the $200 mark.
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Old 09 February 2026, 00:27   #3
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Yes probably am I'm prepared to pay that but can't locate one yet any idea how
Kenneth
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Old 09 February 2026, 08:56   #4
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Quote:
Originally Posted by Benny10210 View Post
Yes probably am I'm prepared to pay that but can't locate one yet any idea how
Kenneth
Couple on Ebay. Double-check seller is prepared to ship to the UK.
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Old 09 February 2026, 10:20   #5
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Country: UK - England
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Couple on Ebay. Double-check seller is prepared to ship to the UK.
Yes contacted a couple but really expensive more than the engine is worth but 2 won't deliver and 1 £70 for delivery
.
So it's a no from me
Kenneth
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Old 09 February 2026, 10:28   #6
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This is outside my experience but is it a a "potted" unit or could it be opened up and basic checks made by an electronics person to see if a specific component has failed?
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Old 09 February 2026, 17:01   #7
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Country: UK - England
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This is outside my experience but is it a a "potted" unit or could it be opened up and basic checks made by an electronics person to see if a specific component has failed?
The unit unfortunately a sealed item i did ask a company CDI LTD if they could repair but said no but I could purchase a new one ex stock 495usd plus postage
Joke.
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