The results of my "76" after she was surveyed were quite good for her age. Mostly a clean bill of health with the exception of hoses to be double clamped and a small delaminated area below the waterline (I have already repaired that). I went into the bowels of my 25, (not my most favorite thing to do) and began clamping everything twice. I have an inboard Yanmar where the propellar shaft runs to the back through the hull. A large rubber hose joins a metal pipe inwhich must run the shaft. The hose doesn't look very good possible dry rot. I imagine I must have to disasemble the propellar shaft to replace this large hose. I don't believe it's the stuffing box (I'm no expert). Can anyone tell me what it is, what it does, (probably for water cooling) and how I can replace it and where I can get a replacement. Any expert or experienced advice appreciated, thank you. Mark of Plymouth, MA
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Stuffing Box
Yes, Mark. I think you found the stuffing box. I helped a friend change his this past spring. The rubber hose connects to the adjusting ring to allow water to drip and, thereby, lubricate the shaft where it passes through the stuffing box. Any hose that "touches" outside the hull or "touches" sea water should be double-clamped. (1 for backup). To change the hose you speak of, you will have to detach the shaft from the transmission; remove the flange; and slip the shaft out of the hull. (Double-check the rudder - it may be in the way). If the rudder is in the way, then it may have to be removed (or lowered) out of the way first. You can buy the replacement hose at WM or any boating store. Bring the old one with you to measure. To reassemble - reverse the procedure. Be sure to replace the flax packing while you're at it. Don't skimp. And double-clamp the hose to the stuffing box fittings. Good Luck!
Yes, Mark. I think you found the stuffing box. I helped a friend change his this past spring. The rubber hose connects to the adjusting ring to allow water to drip and, thereby, lubricate the shaft where it passes through the stuffing box. Any hose that "touches" outside the hull or "touches" sea water should be double-clamped. (1 for backup). To change the hose you speak of, you will have to detach the shaft from the transmission; remove the flange; and slip the shaft out of the hull. (Double-check the rudder - it may be in the way). If the rudder is in the way, then it may have to be removed (or lowered) out of the way first. You can buy the replacement hose at WM or any boating store. Bring the old one with you to measure. To reassemble - reverse the procedure. Be sure to replace the flax packing while you're at it. Don't skimp. And double-clamp the hose to the stuffing box fittings. Good Luck!
See this.
See Related Link, then "Tech Corner", then "Stuffing Box Maintenance" for a good breakdown of the stuffing box. Paul is exactly right in his description of the procedure for replacement. But you can probably get the shaft out without removing the rudder by loosening the strut(part in front of the rudder that holds up the shaft). It probably needs new bolts and rebedded anyway. While you have the shaft out you should replace the cutless bearing in the strut. All of this while the boat is out of the water of course.
See Related Link, then "Tech Corner", then "Stuffing Box Maintenance" for a good breakdown of the stuffing box. Paul is exactly right in his description of the procedure for replacement. But you can probably get the shaft out without removing the rudder by loosening the strut(part in front of the rudder that holds up the shaft). It probably needs new bolts and rebedded anyway. While you have the shaft out you should replace the cutless bearing in the strut. All of this while the boat is out of the water of course.
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