Air Conditioning Water Pick-up
#11
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Originally Posted by Boomer 880
What did you use to plug the old hole? Or, did you reglass and gelcoat ?
#13
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Originally Posted by Ratickle
Baja Runner, Don't forget the pic.
I copied the same spot dock holiday did on his 36. theres a pic of his here on oso somewhere.
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My A/C unit wont pull water from the lake, the valve is open and I dont think I have vapor lock......... Any ideas? There is a red deal just above the water filter that looks like a water pump/impeller, could that be bad?
#16
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Originally Posted by powerquest 380
My A/C unit wont pull water from the lake, the valve is open and I dont think I have vapor lock......... Any ideas? There is a red deal just above the water filter that looks like a water pump/impeller, could that be bad?
![Confused](/forums/images/smilies/confused.gif)
I do know there is an impeller in there that can go bad though.
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Originally Posted by powerquest 380
My A/C unit wont pull water from the lake, the valve is open and I dont think I have vapor lock......... Any ideas? There is a red deal just above the water filter that looks like a water pump/impeller, could that be bad?
If it was the first time out for the season I would open the valve and run the boat just a little to force water in the system.
When you go to pull the boat out of the water close the valve first and you will not have to prime it the next trip out.
#18
Were doomed!
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OK, since i get about 4 of these types of calls per week let me shed some light about them. ![Smilie](/forums/images/smilies/smile.gif)
Putting the pickup on the transom is no problem.....BUT....that's only as long as your pump and the pickup line is mounted below the water level. I'd say about 80% of the pumps on the market for marine AC systems are ours...(March Pumps) and our pumps are not self priming. So if you have a service loop in the system and have an air pocket in the line or inside the pump it wont work. One problem i see with the transom mounted pickup is when you get underway the line will bleed out the water and then you have air in the lines.....so again if your pump is mounted above the water level it will never prime itself again till you get the air out. Many boaters that cant mount the pumps below the water level put a "T" on the output side of the pump with a garden hose attachment so they can prime the system if it looses prime.
Another common call i get is in the beginning of summer when people put the boats on the water for the first time....they go to start the AC system and nothing works.....people winterize the engines just fine but forget about the AC system and what happens is the water pump usually gets the brunt of the freeze and cracks....time for a new one![Frown](/forums/images/smilies/frown.gif)
Another common problem is seaweed gets sucked into the pump......get a small sea-strainer or filter to trap this stuff before it gets into the pump...
I'm sure i'll think of a few more after i post this but its what comes to mind right now. If you need any help feel free to call and ask for Walter
March Pumps-847-729-5300
![Smilie](/forums/images/smilies/smile.gif)
Putting the pickup on the transom is no problem.....BUT....that's only as long as your pump and the pickup line is mounted below the water level. I'd say about 80% of the pumps on the market for marine AC systems are ours...(March Pumps) and our pumps are not self priming. So if you have a service loop in the system and have an air pocket in the line or inside the pump it wont work. One problem i see with the transom mounted pickup is when you get underway the line will bleed out the water and then you have air in the lines.....so again if your pump is mounted above the water level it will never prime itself again till you get the air out. Many boaters that cant mount the pumps below the water level put a "T" on the output side of the pump with a garden hose attachment so they can prime the system if it looses prime.
Another common call i get is in the beginning of summer when people put the boats on the water for the first time....they go to start the AC system and nothing works.....people winterize the engines just fine but forget about the AC system and what happens is the water pump usually gets the brunt of the freeze and cracks....time for a new one
![Frown](/forums/images/smilies/frown.gif)
Another common problem is seaweed gets sucked into the pump......get a small sea-strainer or filter to trap this stuff before it gets into the pump...
I'm sure i'll think of a few more after i post this but its what comes to mind right now. If you need any help feel free to call and ask for Walter
March Pumps-847-729-5300
__________________
-Wally
Money can't buy happiness, but it can buy horsepower. And I've never seen a sad person hauling a$$!
-Wally
Money can't buy happiness, but it can buy horsepower. And I've never seen a sad person hauling a$$!
#19
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Originally Posted by Wally
OK, since i get about 4 of these types of calls per week let me shed some light about them. ![Smilie](/forums/images/smilies/smile.gif)
Putting the pickup on the transom is no problem.....BUT....that's only as long as your pump and the pickup line is mounted below the water level. I'd say about 80% of the pumps on the market for marine AC systems are ours...(March Pumps) and our pumps are not self priming. So if you have a service loop in the system and have an air pocket in the line or inside the pump it wont work. One problem i see with the transom mounted pickup is when you get underway the line will bleed out the water and then you have air in the lines.....so again if your pump is mounted above the water level it will never prime itself again till you get the air out. Many boaters that cant mount the pumps below the water level put a "T" on the output side of the pump with a garden hose attachment so they can prime the system if it looses prime.
Another common call i get is in the beginning of summer when people put the boats on the water for the first time....they go to start the AC system and nothing works.....people winterize the engines just fine but forget about the AC system and what happens is the water pump usually gets the brunt of the freeze and cracks....time for a new one![Frown](/forums/images/smilies/frown.gif)
Another common problem is seaweed gets sucked into the pump......get a small sea-strainer or filter to trap this stuff before it gets into the pump...
I'm sure i'll think of a few more after i post this but its what comes to mind right now. If you need any help feel free to call and ask for Walter
March Pumps-847-729-5300
![Smilie](/forums/images/smilies/smile.gif)
Putting the pickup on the transom is no problem.....BUT....that's only as long as your pump and the pickup line is mounted below the water level. I'd say about 80% of the pumps on the market for marine AC systems are ours...(March Pumps) and our pumps are not self priming. So if you have a service loop in the system and have an air pocket in the line or inside the pump it wont work. One problem i see with the transom mounted pickup is when you get underway the line will bleed out the water and then you have air in the lines.....so again if your pump is mounted above the water level it will never prime itself again till you get the air out. Many boaters that cant mount the pumps below the water level put a "T" on the output side of the pump with a garden hose attachment so they can prime the system if it looses prime.
Another common call i get is in the beginning of summer when people put the boats on the water for the first time....they go to start the AC system and nothing works.....people winterize the engines just fine but forget about the AC system and what happens is the water pump usually gets the brunt of the freeze and cracks....time for a new one
![Frown](/forums/images/smilies/frown.gif)
Another common problem is seaweed gets sucked into the pump......get a small sea-strainer or filter to trap this stuff before it gets into the pump...
I'm sure i'll think of a few more after i post this but its what comes to mind right now. If you need any help feel free to call and ask for Walter
March Pumps-847-729-5300
is it bad turning on the pump unprimed?
#20
Were doomed!
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Check vales are fine....as long as they are not smaller in size I.D wise to cause a restriction......and we recommend on all our centrifugal pumps to mount any valves on the output side of the pump to lessen the chance of causing a restriction. As for turning the pump on unprimed.....depends on what pump you have......out smaller pumps like the 2C and 3C models can run for up to an hour without damage....the bigger pumps like our series7, 8, and 10 (Which don't get used in boating applications) can only run for a few minutes before damage occurs. The most common damage we see from extended dry running is melting the back side of the impeller....whats happening is with no water in the pump the impeller is being pulled against the rear pump housing by the magnets....then its plastic on plastic contact with no cooling and sooner or later the plastic will overheat and start to melt......
__________________
-Wally
Money can't buy happiness, but it can buy horsepower. And I've never seen a sad person hauling a$$!
-Wally
Money can't buy happiness, but it can buy horsepower. And I've never seen a sad person hauling a$$!