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Old 06-09-2013, 09:01 PM   #1
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Country: UK
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Size of the thread on a 200/225 mecury prop shaft

Hi I need to buy a nylock nut to hold my modified Raker 1 prop on my Mercury 250xs leg. The 200/225 optimaxs use the same leg/thread.

Anyone know the size?

Thanks

Dave :-)
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Old 06-09-2013, 11:18 PM   #2
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Country: FRANCE
Interests: speed on water/technics
Boat make: INVADER
Engines: MERC 250XS/SM 1.62
Cruising area: south Britany

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prop shaft threads on merc 250 XS

Hi,
The thread for the prop shaft nut is 3/4 UNF, so 16 threads per inch.
If you need a brass nut lock only, you can buy SIERRA SIE-183700.
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