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Old 07-04-2006, 11:21 PM   #1
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Country: UK
Location: Alderholt
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Boat name: T/T D2S
Boat make: Midas 27' Cat, Argo 16 Cat. Avon Rib Thingy
Engines: Merc 280-ROS -JSRE,65Xs, 75 Stinger, Yam 60
Cruising area: Any Seedy Bar

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Merc Threads & Sizes

Been a few questions now & in the past on bolts nuts & threads
I have dug out this old chart from an old Merc service manual, mostly because this one is on 3 pages rather than being spread througout the whole manual. and covers a larger HP range
Models may have changed but the threads are still the same in pretty much all locations mentioned.

first is the size - then the TPI (Threads Per Inch) Downloadable PDF from URL

http://www.hedges-uk.com/boat/Merc%20Threads.pdf
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Old 08-04-2006, 07:56 AM   #2
Traveling
 
Country: UK
Location: Alderholt
Occupation: Aerospace
Boat name: T/T D2S
Boat make: Midas 27' Cat, Argo 16 Cat. Avon Rib Thingy
Engines: Merc 280-ROS -JSRE,65Xs, 75 Stinger, Yam 60
Cruising area: Any Seedy Bar

Join Date: Sep 2004
Location: Alderholt
Posts: 4,223
Sorry should have added they are all UNC or UNF (BSF, BSC to us)
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Old 08-04-2006, 09:30 AM   #3
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useful
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Old 28-04-2006, 12:51 PM   #4
Traveling
 
Country: UK
Location: Alderholt
Occupation: Aerospace
Boat name: T/T D2S
Boat make: Midas 27' Cat, Argo 16 Cat. Avon Rib Thingy
Engines: Merc 280-ROS -JSRE,65Xs, 75 Stinger, Yam 60
Cruising area: Any Seedy Bar

Join Date: Sep 2004
Location: Alderholt
Posts: 4,223
A breakdown of Types

Refer to numbers on the PDF List for X ref ( handwritten on the LH side of page)

UNF
1, 14, 19, 27, 29, 31, 33, 42, 45, 47, 48, 49, 54

UNC
2, 3, 4, 5, 6, 7, 10, 11, 12, 15, 16, 17, 18, 23, 25, 34, 39, 40, 41, 43, 44, 46, 50, 51, 52, 53, 55

Plug is a 14 MM
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