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Clean out tray kill switch nut size?

Impelled

Jetboaters Lieutenant
Messages
118
Reaction score
94
Points
172
Location
Columbus, Ohio
Boat Make
Yamaha
Year
2006
Boat Model
SX
Boat Length
23
Doing some upgrades to my 2006 SX230HO, SS scupper, new transducer/wire/meter & rebuild kits for the clean out plugs, etc.
I need to replace the plastic/nylon nut, jam nut, that’s at the very top of the engine kill switch in the clean out tray. I’ve searched and found 2 dimensions:
M16-1.50 or 5/8- 18? I’m thinking the metric one, but I can’t find out for sure.
Plus, Where to find it? I-boats shows one but then don’t give the dimensions in the specification or description section!?‍♂️ Thanks in advance ?
Shout out to Tad Steinberg for the scupper and depth finder work!
 

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Hi, did you ever find an answer? I have one of those nuts on my '07 AR210 that snapped in half.
 
Looking for the answer as well
 
I replaced those nuts on my 2012 242 ltd a few years back and noted the size as M16x1.5
 
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