R-21 Engine Tubing, Flush

[Kamalani]

I recently discovered that a 12' length of small plastic tubing had detached from the stbd. side of the engine, and was laying in the bilge. This appears to be some sort of overflow line, but I have no clue as to where it belongs.
While I'm admitting my ignorance here - my owner's documents, keys etc. also included a nice little yellow plastic hose connector. I assume this is to allow flushing the engine cooling system. There is no reference to this in the Yanmar manual, so I could use a little help as to connecting and flushing.
Thanks, Alex, "Kamalani"

 

[Texas Steve]

I'm guessing that hose has something to do with the bilge pump problem you were having before. I'm sure Andrew from the factory will be a much greater help than I.

Texas Steve

 

[ron cowan]

I was unable to locate a small plastic tube on the engine of my 2006 tug. As for the yellow connector I have used it to flush my system after salt water use. There is a cap just downstream of the raw water strainer. You uncap this and install the yellow connector to which your water hose can be hooked to for a flush. The connector has a check or restrictor which I found impeded me on flushing RV antifreeze into the system from a bottle. I fabed a funnel with a conector to use in place of the yellow one and it is very quick to flush antifreeze into the system each time I use the tug in this cold weather. Will continue to see if I can find anything about the 12" tube.
Ron

 

[Tugly]

Tugly has two tubes that fit the description. Both clear plastic maybe 3/8 + OD. One attaches to the engine on the left rear just below the exhaust elbow. The connection is a brass slip which looks like it could be a coolant drain. The other is on the right side of the engine about 4 inches to the rear of the oil filter. It appears to be next to the temperature sending unit. Probably another coolant drain. Hope this helps.

Bill

 

[K7MXE]

Ron I have found that to put fresh water or anti freeze into the system you close off the sea water valve and use the port in the hose to attach a hose to. A hose from a washing machine is perfect. Add fresh water as your starting the motor for a flushing and for adding anti freeze for the winter just take that hose and put it in the gallon jug and the pump will suck it out. Remember pure anti freeze will freeze and needs some water to make it work. I dont know how good the pink stuff you put the water tank will do for over the winter, someone can help on that. I also have the drains on my motor but
the one near the oil filter does not have a hose on it.

Bob Heselberg Eatonville Wa

 

[Andrew Custis]

That tube is for draining of the antifreeze. It goes on one of the two brass petcocks on the engine. Not needed but helpful when draining.

 

[captain's cat]

Ron I have found that to put fresh water or anti freeze into the system you close off the sea water valve and use the port in the hose to attach a hose to. A hose from a washing machine is perfect. Add fresh water as your starting the motor for a flushing and for adding anti freeze for the winter just take that hose and put it in the gallon jug and the pump will suck it out. Remember pure anti freeze will freeze and needs some water to make it work. I dont know how good the pink stuff you put the water tank will do for over the winter, someone can help on that. I also have the drains on my motor but
the one near the oil filter does not have a hose on it.

Bob Heselberg Eatonville Wa

I had my doubts about the "bold" part above but, this shows he's very correct!!
:!: :!:

http://www.gi.alaska.edu/ScienceForum/ASF6/680.html

 

[Kamalani]

My thanks to everyone who supplied great answers to my two issues. With friends like you "Tug Nuts" I won't remain ignorant for long! Alex, "Kamalani"

 

[BaseCampAnne]

How often do you flush the cockpit bilge?

Andrew told me I should do it periodically.

Do you completely clean and dry it?

Thanks in advance 🙂

 

[RProffer]

If you trailer your boat, you should pull the plug every time you pull your boat out of the water. You do not want dirt, leaves, oil, and crud to build up in the bilge. The crud could jam things or keep the bilge pump from working. Use your wet/dry shop vac to get the crud out. Then wash it out with soap and water and rinse, and let it drain out the drain hole. No need to dry it. It is made to be wet.

 

[BaseCampAnne]

Thanks for answering. The plug method sounds ideal.

Since I live aboard my boat I must clean the bilge without using the plug and it is tough getting down in there and doing a good clean out. I do not have a wet dry vac but may ask around.

Thanks.

 

[RProffer]

You can get a small wet dry vac (2 - 3 gal) or a back pack version. Either one could be kept in a dock box.