Salt water leakage in engine bilge
- Thread starter Steve s
- Start date
Most if not all 393's do not have a stuffing box. They have a dripless seal. Otherwise, it could be from several sources. Is it a large amount or a drip? Have you checked the Vetus (or similar) vented loop? They can clog up and cause a slow drip. Can you tell if it is coming from a hose connected to the water pump, or the water pump cover plate? How about telling us if only happens when the engine is running, or all the time? We can help you pin it down with more information.
The "new" welded stainless mixing elbows fail at the weld after about 400 hours in salt water, with tiny holes which I have caulked with a bead of silicone, but that is only a temporary solution. The old cast iron mixing elbows lasted much longer, but Yanmar knows best?
Saltwater leakage engine bilge
Brief history is that the water accumulation seemed to occur whether engine was running or not. While boat was on the hard this past year we noticed the seal where prop shaft exits the hull was slightly adrift. This was repaired and for the first 2 months of the sailing season did not notice any water accumulating in engine bilge. However recently after the first extended use of the engine (7 consecutive hours), sea water once again appeared in the engine bilge. So at this point am not sure whether the prop seal repair actually had any bearing on this.
Thanks to all for the input
Brief history is that the water accumulation seemed to occur whether engine was running or not. While boat was on the hard this past year we noticed the seal where prop shaft exits the hull was slightly adrift. This was repaired and for the first 2 months of the sailing season did not notice any water accumulating in engine bilge. However recently after the first extended use of the engine (7 consecutive hours), sea water once again appeared in the engine bilge. So at this point am not sure whether the prop seal repair actually had any bearing on this.
Thanks to all for the input
I am seeing similar water accumulation in the skeg area under the prop shaft on my 323. Its not a large amount, and I was attributing it to wear on the dripless seal.
There is no way to adjust tension on the shaft contact. I concur that another possibility is the caulking around the area where the shaft log exits the skeg. Then there is the area where the rudder post intersects the hull as a possibility. I have been cleaning it up with a sponge and bucket after sailing, and it does not accumulate while the boat is sitting at the dock. Oh well, another item on the project list when the boat hauls out for the winter and that's in 3 more weeks.
The device on the prop shaft exit is the cutlass bearing, it is designed to allow water to exit the boat, cooling and lubricating the shaft. There is a forward seal within the boat where the shaft enters and attaches to the transmission coupling. This seal is connected to a seawater thru-hull via a hose. Check those fittings when under power. Believe the parts are Volvo, available from Beneteau, alternatively PYI sells a popular shaft seal. Shaft disassembly, and alignment required.
An old thread I know, but, Gunni, does the thru-hull hose connect to a seal [which would be inside the tube], or just to the tube. I have unfortunately broken off the hose tail that is screwed into the tube, with the possibility that some of the brass hose tail is now in the tube. Or if you are correct, inside the bearing if that is at all possible.
Am preparing to haul out to get the whole shaft arrangement inspected, will replace the Volvo Seal at the same time [10 yo]. Am advised that could disconnect completely the the seawater thru-hull - hose - shaft tube/ bearing arrangement an scouring the WWW for info as to whether this is correct.
Am preparing to haul out to get the whole shaft arrangement inspected, will replace the Volvo Seal at the same time [10 yo]. Am advised that could disconnect completely the the seawater thru-hull - hose - shaft tube/ bearing arrangement an scouring the WWW for info as to whether this is correct.