Packing Box

[northeast1]

Decided that when she is out the water i am going to change the packing as it is nipped up to the face now.

Anything i should be worried about twhen doing this job i may have over looked?

I know about the 90 degree apart bit, know about the little bit of water for coolant, undersand if its hot when its fitted it need backing off.

Will removing the old packing effect the balance of the shaft or will that be held firm still with the bearing at 1 end and the gear box at the other.

 

[mark]

use teflon/ptfe gland packing. avoid graphite like the plague

don't over tighten, a little more than hand tight. if its clamped tight it will get hot and breakdown rapidly when running.

 

[northeast1]

Yer i read about the teflon stuff being better, i used the graphite one for some coolant pumps and it went hard after about 6 months and was lubed up to hell.

Will have to see where i can buy some from, not sure of the size yet until i take the old stuff out.

Cheers

Keep them comming

 

[northeast1]

Ow also if anyone has a none electric hook up pressure washer suitable for a hull wash, i would like to hire one for a cost...rather pay someone off here than hire one from a tool hire shop...would only be for 1 day and for a 6m hull wash.

7th of April for the Royal Quays Tynemouth

 

[mark]

don't use any graphite anywhere. Apart from the fact it hardens up, its right up the galvanic scale and loves to get galavanic corrosion going - especially against stainless steel. get a voltmeter, one rpobe int he graphite, the other against you're stainless shaft and you'll see 0.2 to 0.3 volts

chuck a bit of salty water in as an electrolyte and it'll start munching away at the shaft

if you've had graphite in the stern gland betcha there's some pitting on the shaft already.

If your cutlass bearing is brass and not bronze it can also start chewing the zinc out of the brass alloy, leaving just the copper behind, weakens the bearing shell, increases play and flex on the shaft and can either break up or start to put excessive wear on the bearings at the gearbox end (unless you've a flexible shaft coupling)


Royal quays is terrible for having leaky electric on the pontoons, too many boats left plugged into shore power all the time, leaking leccy into the water.... all those positive electrons looking for somewhere to go.... basically anywhere that is lower down the galvanic scale - zinc anodes being one thing, but any graphite with an electrical connection to the water (ie shft and prop) is another

fitting a galvanic isolator to the battery system is worth thinking about if you're keeping the boat in there for a long time

last wee boat I had in there, fitted a new anode to the outboard leg, left the leg in the water a couple of months.... no anode left. blame it on that geet big blue cat that was hooked up next to us at the time

at a guess 4 or 5mm. you'll need about metre and storrars!

 

[northeast1]

Cheers Mark anymore info like that is a great help, Stingray has had a service pro engineer service her for the last 6 years of her life but since i purchased her July 2006 it has been done by me and my Dad, we both engineers but when doing any new task it is always best to get as much info as you can.

These boats get more TLC than my house and car put together be sorry to see her go in 2011