Overheating stuffing box

[skipmac]

Originally Posted by artisanmach

is the shaft properly aligned? it maybe rubbing on gland...

I sure hope the shaft is aligned. I spent a few hours working on it. Boat has a v-drive and six motor mounts so it was a bit of a pain. It must be pretty close because I don't get any vibration or shaft wobble when I run it.

[model 10]

Shaft wobble isn't much of a test. It can only wobble if it's bent or it's bolted onto the flange crooked. The shaft will run true to the flange once they are bolted together.

[artisanmach]

my shaft is strait and aligned with no movement in shaft, my stuffing box hose was so short and old it was applying a side load that made it to hot to touch. I replaced the hose and packing and I can hold my hand on it.

[skipmac]

Originally Posted by Guy

Shaft wobble isn't much of a test. It can only wobble if it's bent or it's bolted onto the flange crooked. The shaft will run true to the flange once they are bolted together.

Now I think about it I guess shaft wobble isn't much of a test. What about no vibration?

[skipmac]

Originally Posted by artisanmach

my shaft is strait and aligned with no movement in shaft, my stuffing box hose was so short and old it was applying a side load that made it to hot to touch. I replaced the hose and packing and I can hold my hand on it.

How short? I do have a new hose, Buck Algonquin 6 ply stuffing box hose about 15-16" long as I recall. Didn't notice any significant curvature to the hose before installation so assume it's not giving a side load. That's still an interesting idea to keep in mind.

[skipmac]

Originally Posted by Celestialsailor

Skip...I went through that whole mess when I launched with the new Teflon packing. I couldn't.t put my hand on the bronze. After realigning, it didn't seem much better. After a few hundred miles, it was cooler. I'm going back in the water in a few months and may change back to the flax style. My worry was shaft friction damage.

I'm also worried about friction damage. There's already a little grooving on the shaft and don't want it to get worse.

I will definitely change packing due to potential galvanic reaction between the graphite in the Gore GFO and my antique bronze shaft. The flax packing that I found at Defender seems to be flax with teflon. Can you still get old style flax with wax or whatever they used to use?

[model 10]

Originally Posted by skipmac

est. What about no vibration?

If the shaft is straight and the prop is in balance it would take a significant contact in a worn cutlass to cause a vibration. Then it would be a 1/2 frequency (?.) Weird, you would notice.

[Celestialsailor]

Originally Posted by skipmac

I'm also worried about friction damage. There's already a little grooving on the shaft and don't want it to get worse.

I will definitely change packing due to potential galvanic reaction between the graphite in the Gore GFO and my antique bronze shaft. The flax packing that I found at Defender seems to be flax with teflon. Can you still get old style flax with wax or whatever they used to use?

Two of many online.

Western Pacific Flax Shaft Packing Retail 1/4 WPT-10003
http://www.jamestowndistributors.com...ct.do?pid=3862

[boatbod]

You can obtain all types of packing including traditional. Preference at the yard I run is the white Teflon, which has good life but isn't so harsh on shafts as GFO.

[artisanmach]

maybe 4 inches, it looks like it had been cut several times in the past from the grooves I can see that are worn on the shaft. I believe the hose was just that. the new one has a much thicker wall an is about 10" long. I did purchase a Norscot shaft seal but can't install it until next haul out so I can replace the shaft. there are too many grooves.