stuffing box packing in 1978 hunter 27/ HELP!

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pethia

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Jul 3, 2004
27
- - cape cod , MA
I went to replace the packing in my stuffing box/ 1978 Hunter 27 with a Yanmar sb8. As far as I can tell, I think the entire engine has to be disconnected from the drive shaft and moved forward! Anyone else encounter this problem?
 
D

Deadline

Need to clarify...

Not sure if you're replacing an engine or not. If your question is procedural, try this... Stuffing box best replaced on the hards, not in the water REMOVAL Unscrew thin brass jam nut to free up big one Unscrew big brass nut completely. Spray WD-40 inside to loosen up flax. Turn corkscrew pick into first layer, pull Vise Grip offers better leverage Repeat until all layers removed 2 if was chinzy, 3 more likely Clear out brass seating of any loose debris so new flax sits well INSTALL Buy 13 inches Teflon 1/4 inch to cut into three pieces Cut the end at 45 degrees to dovetail with next cut, 45 degrees Turn first wrap tight, mark with blade (or do at home with 1-inch stanchion) Cut with share razor knife or Dremel saw Cut remaining 2 wraps to same size Poke first one in clockwise by turning big nut slowly Mark where it started with red pen Screw down onto shaft to pack, by hand only Loosen and repeat two more times Do not overtighten, or will burn flax and not seat properly TEST When launch, be prepared to tighten using wrench keep jam nut loose Should be no drips at rest, do not overtighten In gear, should be no more than 1-3 drops per minute preferably none Optimum is no drips in gear “1-3 is an old wives tale,” says Fred at Yard Tighten one flat at a time while in gear If the big nut is warm, back off as too tight burning the flax (unlikely) Always retighten the jam cleat to avoid inadvertent loosening When it’s right, try a day or week later takes time, be patient Check again for three weeks then three months later Should last three or four years okay to tighten one flat a time, over time
 
S

steve rainey

stuffing box

I got a set of picks from Lowes or HD. Like dental picks. worked great. Just back off the brass nut and following the instructions on this link. Lots of info also in the archives.. Its not a hard thing to do...Just seems like it the first time you do it..
 

pethia

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Jul 3, 2004
27
- - cape cod , MA
Steve and Deadline

My problem seems to be that there doesn't appear to be enough room to slide the packing nut back far enough to even remove or replace the packing. This is why I am wondering about whether or not the engine has to be disconnected and slid forward to make enough room to move the packing nut. Do either of you have this arrangement in your 77 or 78 boat with the Yanmar sb8?
 
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