I own a H-30 1978 model with a yanmar ysm-12.I need to replace the prop shaft packing box but do not know where to measure to get proper dimentions to insure i order correct box.any advice?
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That's a good question. Is there no mfg. info on the box? I guess I do not remember seeing any on mine and I had it out of the boat. I think that I would call a supplier and get their input. They may even have a list showing your actual boat. One such company would be: http://www.glenwoodmarine.net/Catalog/SHAFT LOG.pdf .
The basic dimensions are the one inch hole for the shaft and the length. The outside diameter is the same as the inside diameter of the hose at the stern end.
You probably know that you should also replace the hose attaching the stuffing box to the shaft log. And inspect the shaft log closely, that tube coming in through the hole from the outside. Replacing these items requires that the shaft is loose from the coupler. Then slid back for at least four or five inches of clearance. Best done with the boat on the hard.
The basic dimensions are the one inch hole for the shaft and the length. The outside diameter is the same as the inside diameter of the hose at the stern end.
You probably know that you should also replace the hose attaching the stuffing box to the shaft log. And inspect the shaft log closely, that tube coming in through the hole from the outside. Replacing these items requires that the shaft is loose from the coupler. Then slid back for at least four or five inches of clearance. Best done with the boat on the hard.
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