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5673Re: [campernicholson] Nic 35

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  • Thomas J. Stanton
    Jul 6, 2011
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      It is probably your packing gland.  It is V drive so the packing gland is under or slightly forward of the transmission. It is probably not necessary to replace the stern gland.  It should have a plate with two bolts holding the packing in place.  The bolts and that housing into which they screw are bronze and even if somewhat corroded should free with a little penetrating oil.  If you tighten them, the packing should tighten against the shaft and the leaking will stop.  If the bolts are all the way down the packing is down and should be replaced, because of the clearances a small handled socket wrench works best and the engine should be shut down.  It is best to do it on dry land, but it is possible to remove the plate (making sure the existing packing is not coming free with the plate) and add new packing on the top and replace the plate and then when you then screw down  temporarily you can shut down the flow, but there defintely is a risk of the flow increasing while you add packing, but it has never been a problem for me.  
      Long ocean passages under motor (like we have in the summer in the U.S.), will always wear down the packing and the packing gland must be tightened (probably every 400-500 miles) on every every boat, so it is good to get familiar with yours.  Packing glands are very old tech but although they may leak, they rarely fail.
      The fuel pump is a lift pump bringing the fuel out of the tank and delivering it to the injector pump which sprays the fuel under pressure into the cylinders. If the fuel is being drawn out of the filter and not being replaced there may be an air leak in the fuel lines to that filter, letting air enter, but if the fuel pump is working correctly
      the line should be pressurized and fuel should be in the filter with some leaking out of the area of the leak.  The fuel pump could be failing, or in the alternative, if the boat has been setting a long time there may be gunk in the mouth of  intake line in the fuel tank making it difficult for the pump to pull up fuel. You could blow this out with some reverse air pressure in the line, but you may ultimately have to have the fuel in the tank scrubbed.Gunk accumulates over time if the boat has been sitting, and when you take her to sea the agitation knocks all that gunk loose and it begins to float in the fuel and plug your filters.
      Which belts are being shreded?  Sounds like they are out of alignment, either at the sea water pump or the alternator.
      Tom Stanton
      C/N 40ac Discovery
      ----- Original Message -----
      Sent: Wednesday, July 06, 2011 9:18 AM
      Subject: [campernicholson] Nic 35


      I have just bought a Nicholson 35 it is Bluedays a 1983 boat from Dover and I sailed it up to Scotland alone on the way it shredded 5 fan belts. But my main problem at the moment is water is leaking from just in front of the gearbox very badly has anyone had this problem can I lift the boat out of the water and replace the stern gland or cutlass bearing at the prop end or will the engine have to be lifted out to get at the gear box end stern gland I don't know how this system works as I have had snuffing boxes on passed boats. has any one a drawing of the arrangement? My other problem is the engine starts but dies immediately the fuel filters are clean but the filter is only half full of diesel so I suspect the fuel pump, Is the Injector pump the fuel pump also. and may be this points to the belt shredding if the engine is starved of fuel? Thank you for any help given Gordon

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