This is an interesting observation. It would imply that all stuffing boxes run dry at planing speeds and I would then figure that the critical and overriding factor is the tightness or friction due to compression of the packing. It would be interesting to also know how shapes, speed and depth (pressure) work together to affect the waters ability to remain in contact with the stuffing boxes. Maybe on actual experience has anyone viewed a leaky stuffing box at speed and seen it actually stop leaking because of this potential vacuum? Lip and face seals having water injection seem to corroborate the fact that the water does literally move away from the shaft log. Air conditioners have scoop strainers to ensure adequate water at speed yet generators do not. The fear is that generators may be overwhelmed by the scoop strainer and flood a cylinder or two but even without a scoop strainer I have never seen my genset run hot or pump less water at speed. Obviously these intakes are in different positions relative to the water flow but water can behave in odd ways around obstacles. I think I will try an experiment this spring. At speed, I will clamp the raw water line to my pss shaft seal and pull back on the boot and see what happens. Should be interesting.
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Re: How many rings of packing for the stuffing box?
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Re: How many rings of packing for the stuffing box?
What is an acceptable temp at the stuffing box when under way?
ArtTrouble
43DCFB DC-306
AYC NY
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Re: How many rings of packing for the stuffing box?
"Mike, my 53' has 2 inch shafts. Was your packing the 1/2" "
Ang, I have the 2" shafts; I'm pretty sure it was 1/2" packing but it was several years ago so I wouldn't trust my memory on that! I have a spare package of it on the boat but since I'm not there, I can't check it. Sorry!Mike P
San Miguel de Allende, Mexico; Kent Island MD; San Antonio TX
1980 53MY "Brigadoon"
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Re: How many rings of packing for the stuffing box?
Thanks!
Mike,
"SeaWhisperer"
1969 Hatteras 53' MY
Morehead City, NC.