496 Mag water pumps not priming with new impellers. Time for new pumps?
05-13-2014, 07:49 AM
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496 Mag water pumps not priming with new impellers. Time for new pumps?
Replaced impellers in my '04 496 Mags and now the pumps are having trouble priming. If I can get it to start pumping it seems to do fine. Two years ago my mechanic suggested replacing the pumps at the next impeller change but of course I didn't listen. The pumps are the brass (I think) ones from the earlier 496's. From what I can find you can't just replace the housing but have to buy new pumps. Is this correct? I know a lot of people install the Harden/CP Performance Stainless Pumps. Are these the best way to go? Where's the best place to purchase? Anyone offer an OSO discount?
05-13-2014, 08:20 AM
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There is MANY MANY threads on this.
You can replace with stainless housings, OR they make a kit that you can install 2 thin stainless wear plates in the factory pumps, and then they work again.
You can replace with stainless housings, OR they make a kit that you can install 2 thin stainless wear plates in the factory pumps, and then they work again.
05-13-2014, 09:29 AM
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I've done a ton of searches and managed to confuse myself even more. When you say replace the stainless housing, are you talking about with this kit? It doesn't seem like that would fit my pump since mine doesn't have the plastic housing. So do I have to buy the entire stainless pump assembly (listed here or is there a cheaper option?
I did look at the JC Marine kit that adds wear plates to the factory housing but the web site isn't real clear on whats included and what modifications are required for the mounting bracket. Also seems like a temporary fix?
Guess I need to get off my ass and call CP Perf.
I did look at the JC Marine kit that adds wear plates to the factory housing but the web site isn't real clear on whats included and what modifications are required for the mounting bracket. Also seems like a temporary fix?
Guess I need to get off my ass and call CP Perf.
05-13-2014, 10:54 AM
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I've done a ton of searches and managed to confuse myself even more. When you say replace the stainless housing, are you talking about with this kit? It doesn't seem like that would fit my pump since mine doesn't have the plastic housing. So do I have to buy the entire stainless pump assembly (listed here or is there a cheaper option?
I did look at the JC Marine kit that adds wear plates to the factory housing but the web site isn't real clear on whats included and what modifications are required for the mounting bracket. Also seems like a temporary fix?
Guess I need to get off my ass and call CP Perf.
I did look at the JC Marine kit that adds wear plates to the factory housing but the web site isn't real clear on whats included and what modifications are required for the mounting bracket. Also seems like a temporary fix?
Guess I need to get off my ass and call CP Perf.
05-13-2014, 01:37 PM
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Mine did the same thing every year. Start the boat, then crack the petcock on each pump until it burps the air and you get a decent flow of water. It will take only a few seconds. Mine had me scratching my head. Then I pulled the petcock and it burped a little then I had water flow......
Last edited by low_psi; 05-13-2014 at 01:40 PM.
05-13-2014, 01:46 PM
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Mine did the same thing every year. Start the boat, then crack the petcock on each pump until it burps the air and you get a decent flow of water. It will take only a few seconds. Mine had me scratching my head. Then I pulled the petcock and it burped a little then I had water flow......
05-13-2014, 02:41 PM
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Mine would only do it after being laid up for a winter season. Not every time....
05-13-2014, 03:15 PM
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I've done a ton of searches and managed to confuse myself even more. When you say replace the stainless housing, are you talking about with this kit? It doesn't seem like that would fit my pump since mine doesn't have the plastic housing. So do I have to buy the entire stainless pump assembly (listed here or is there a cheaper option?
I did look at the JC Marine kit that adds wear plates to the factory housing but the web site isn't real clear on whats included and what modifications are required for the mounting bracket. Also seems like a temporary fix?
Guess I need to get off my ass and call CP Perf.
I did look at the JC Marine kit that adds wear plates to the factory housing but the web site isn't real clear on whats included and what modifications are required for the mounting bracket. Also seems like a temporary fix?
Guess I need to get off my ass and call CP Perf.
http://www.offshoreonly.com/forums/d...-question.html
ALSO there was a bad batch of impellers. that where recalled... Mine that i just installed (ordered off amazon like 2 months ago) wher BARLEY out if the date range.. so something to think about as well.
