This year after hauling my H30 out, I decided to remove the raw water pump and replace the impeller this winter. At this time I tried to poor some rv antifreeze into the heat exchanger that the impeller supplies. I found that after blowing out the line, which didn't expell much water. the line would take very little antifreeze. Would forcing more in cause a problem, like backing up into the exhaust of the engine? Thanks Jim Bessigner
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Bill Murray
Pour it in??
I am not sure where you are pouring it in. I suspect that your are trying to add to the coolant side of teh system. the impeller you refer to moves sea water through the system. the best way to winterize this part is to disconnectr the hose from the thru hull intake. Insert it (or add a longer hose so you can insert it)into jug of appropriate antifreeze and with the engine running let it suck it into the engine. switch to another jug when empty - mine takes about three gallons. Look in the archives for more specific directions.
I am not sure where you are pouring it in. I suspect that your are trying to add to the coolant side of teh system. the impeller you refer to moves sea water through the system. the best way to winterize this part is to disconnectr the hose from the thru hull intake. Insert it (or add a longer hose so you can insert it)into jug of appropriate antifreeze and with the engine running let it suck it into the engine. switch to another jug when empty - mine takes about three gallons. Look in the archives for more specific directions.
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Doug
no where to go
Jim, If you are pouring fluid into the heat exchanger, there would already be fluid in the sytem unless you completely drained it. That being so, the fluid you are poring in really has no where to go. The raw water pump forces it through the heat exchanger and out to and through the mixing elbow. If you have many hours on the engine, it would be a good time to inspect the core of the heat exchanger and the mixing elbow for blockage. Take your time now that your vessel is out of the water. A good source of information is the forum on marine engines at www.marinedieseldirect.com/ - follow the links to the engine forum. Seloc Marine has a decent manual on the Yanmars. Amazon or Barnes Noble have that. -Doug
Jim, If you are pouring fluid into the heat exchanger, there would already be fluid in the sytem unless you completely drained it. That being so, the fluid you are poring in really has no where to go. The raw water pump forces it through the heat exchanger and out to and through the mixing elbow. If you have many hours on the engine, it would be a good time to inspect the core of the heat exchanger and the mixing elbow for blockage. Take your time now that your vessel is out of the water. A good source of information is the forum on marine engines at www.marinedieseldirect.com/ - follow the links to the engine forum. Seloc Marine has a decent manual on the Yanmars. Amazon or Barnes Noble have that. -Doug
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Bruce Leidal
Don't take shortcuts
Jim, It sounds like you are trying to take a shortcut, instead of reinstalling the impeller and doing it the way the manufacturer suggests. The systems is ment to be winterized by taking off the hose from the through-deck, putting it in a bucket of anti-freeze, starting the engine and letting it take the coolant through as it would raw-water. Anything short of this process is playing with a large repair bill due to freeze damage. One of the big areas of concern, besides the heat exchanger, is the muffler. It has about a gallon of water in it. I know it is more work to re-install everything to follow this process, however, you will sleep well at night this winter knowing it was done right. Bruce
Jim, It sounds like you are trying to take a shortcut, instead of reinstalling the impeller and doing it the way the manufacturer suggests. The systems is ment to be winterized by taking off the hose from the through-deck, putting it in a bucket of anti-freeze, starting the engine and letting it take the coolant through as it would raw-water. Anything short of this process is playing with a large repair bill due to freeze damage. One of the big areas of concern, besides the heat exchanger, is the muffler. It has about a gallon of water in it. I know it is more work to re-install everything to follow this process, however, you will sleep well at night this winter knowing it was done right. Bruce
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Les Andersen
Anti-freeze ?
Jim, I hope you don't mean that you put the "pink stuff" into your heat exchanger through the cap. That would be the wrong type of anti-freeze and could really be a problem. If you took one of the 2 hoses from the salt water side that go into/out of the exchanger and put the AF in through this I guess it wouldn't hurt but the max the exchanger holds is about a quart vs the 3 or so gallons required to properly treat the engine. Hope I just misunderstood. Les s/v Mutual Fun
Jim, I hope you don't mean that you put the "pink stuff" into your heat exchanger through the cap. That would be the wrong type of anti-freeze and could really be a problem. If you took one of the 2 hoses from the salt water side that go into/out of the exchanger and put the AF in through this I guess it wouldn't hurt but the max the exchanger holds is about a quart vs the 3 or so gallons required to properly treat the engine. Hope I just misunderstood. Les s/v Mutual Fun
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Gregg
Muffler?
I didn't realize the muffler held water. The Yanmar/Hunter manuals don't mention draining the muffler, just adding anti-freeze through the raw water pick-up by letting the engine suck it through. I guess the anti-freeze displaces the water in the muffler?
I didn't realize the muffler held water. The Yanmar/Hunter manuals don't mention draining the muffler, just adding anti-freeze through the raw water pick-up by letting the engine suck it through. I guess the anti-freeze displaces the water in the muffler?
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Tim McCarty
Piece of cake...
I did it this year, instead of paying through the nose, and having the yard do it. I did it as Bruce suggests...simply remove the raw water intake hose, hook up a small garden hose, clamp it down...put a couple gallons of blue pop (ethylene glycol) in a 5 gallon pail, ran the engine until it came out the back of boat (about 2 minutes), and boom, I'm done.
I did it this year, instead of paying through the nose, and having the yard do it. I did it as Bruce suggests...simply remove the raw water intake hose, hook up a small garden hose, clamp it down...put a couple gallons of blue pop (ethylene glycol) in a 5 gallon pail, ran the engine until it came out the back of boat (about 2 minutes), and boom, I'm done.
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Brian Hanna
Mine was easier then that
I debated doing it myself and had bought about $40 in parts to hook up a tee off my raw water intake. (I didn't like the idea of disconnecting the intake hose.) I ran into a friend that used to run the service department at my marina and he told me the easiest way to do it. I have a raw water strainer that I simply took the top off, turned on the engine and poured the antifreeze in. I had someone out back to monitor the exhaust and presto, I saved $200 as I was able to do the same thing to my generator. Tim, how do you like the new boat? Brian Hanna s/v The Journey
I debated doing it myself and had bought about $40 in parts to hook up a tee off my raw water intake. (I didn't like the idea of disconnecting the intake hose.) I ran into a friend that used to run the service department at my marina and he told me the easiest way to do it. I have a raw water strainer that I simply took the top off, turned on the engine and poured the antifreeze in. I had someone out back to monitor the exhaust and presto, I saved $200 as I was able to do the same thing to my generator. Tim, how do you like the new boat? Brian Hanna s/v The Journey
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Tim McCarty
Still getting uses to it...
Hey Brian...I like the boat very well...thanks. I have a few minor hangups with it (forward cleats are located in the anchor locker, no wheel brake-apparently an option on this boat, the engine shutoff is located on the stairs???). Other than that, it's a great boat...sails very well (I like the fractional rig, though, I need to bone up on my reefing technique). It's kind of like buying a new house though...takes awhile to adjust. I still think the Yanmar 2gm is a pain in the but though. My old 1 GM gave me no problems whatsoever in 7 years, the 2 banger is real tempermental though....take care... Tim
Hey Brian...I like the boat very well...thanks. I have a few minor hangups with it (forward cleats are located in the anchor locker, no wheel brake-apparently an option on this boat, the engine shutoff is located on the stairs???). Other than that, it's a great boat...sails very well (I like the fractional rig, though, I need to bone up on my reefing technique). It's kind of like buying a new house though...takes awhile to adjust. I still think the Yanmar 2gm is a pain in the but though. My old 1 GM gave me no problems whatsoever in 7 years, the 2 banger is real tempermental though....take care... Tim
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