Crossover vs Water Pump
#21
Ginger or Mary Ann?
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Originally posted by Crazyhorse
I'd be inclined to think that Merc would be installing crossovers on their engines if they were such a godsend to marine engines. Instead Merc still uses a circulating pump on their supercharged engines.
I'd be inclined to think that Merc would be installing crossovers on their engines if they were such a godsend to marine engines. Instead Merc still uses a circulating pump on their supercharged engines.
OK boys, your turn!
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#22
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Originally posted by US1 Fountain
Are you sure about that?
The impellor in the circ pump is not 'sealed' like in your raw water pump.
Are you sure about that?
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The impellor in the circ pump is not 'sealed' like in your raw water pump.
You can run a crossover with a thermostat and eliminate another source of breakdowns. IMHO, one less thing to break is always a good thing.
Scott B
If I wanted to float around powerless, I'd get a blowboat
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#23
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Great Thread Guys,
I did install crossovers with T-stats in a 28' Cigarette that we had. They worked well to create more room to work on the front of those engines. Man they were stuffed in there...
I did install crossovers with T-stats in a 28' Cigarette that we had. They worked well to create more room to work on the front of those engines. Man they were stuffed in there...
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Patrick
Patrick
#24
Toxic FORMULA
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Originally posted by Scott B
$.02
. However, if a circ pump goes bad, your raw water pump cannot pump past it,so again it does you no good.. Scott B
$.02
. However, if a circ pump goes bad, your raw water pump cannot pump past it,so again it does you no good.. Scott B
I've been there and done that and it worked.
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It was good at idle and I could beat on it all day with no problem. If I ran just off plane , you know , bow in the air pushing water...It would run up to 200*
#25
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Originally posted by mopower
Scott , better check your figures again.
I've been there and done that and it worked.
It was good at idle and I could beat on it all day with no problem. If I ran just off plane , you know , bow in the air pushing water...It would run up to 200*
Scott , better check your figures again.
I've been there and done that and it worked.
![Stick Out Tongue](/forums/images/smilies/tongue.gif)
It was good at idle and I could beat on it all day with no problem. If I ran just off plane , you know , bow in the air pushing water...It would run up to 200*
IMO, the circ pump is dead weight, and when it blows a bearing you cannot pump against it since your raw water pump is now dead also... I should have clarified that in the first post
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I dont see the point of a circ pump when we all know it is a problem child, so why have it if it is not needed?
Scott B
If I wanted to float around powerless, I'd get a blowboat
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#28
Ginger or Mary Ann?
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Scott, I hear ya. I'm going on the fact that in my 35yrs of boating,(I'm 40
) I have never had nor been a witness to a pump going out. It has only been on this board in the last 3 yrs that I have heard of guys having trouble with pumps. And I'm on the water every weekend during the summer. So to me, it is not worth the hassles.
I don't understand your thought here:
IMO, the circ pump is dead weight, and when it blows a bearing you cannot pump against it since your raw water pump is now dead also...
They are driven from separate belts. The water pump will push water past a non rotating circulating pump because the impellor is in a void with no direct sealing. Thats why you can spin it by hand easily with the motor full of water as compared to your raw water pump.
Boat On!
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I don't understand your thought here:
IMO, the circ pump is dead weight, and when it blows a bearing you cannot pump against it since your raw water pump is now dead also...
They are driven from separate belts. The water pump will push water past a non rotating circulating pump because the impellor is in a void with no direct sealing. Thats why you can spin it by hand easily with the motor full of water as compared to your raw water pump.
Boat On!
![Smilie](/forums/images/smilies/smile.gif)
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#29
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True.. [I really need to learn to clarify things better..] I am primarily thinking of serpentine belt accessory drive setups. You are correct in the older boats having separate belts. Considering mine are older boats you think I might remember that wouldn't' ya... ![EEK!](/forums/images/smilies/eek.gif)
Scott B
Back to the twins are better.. Or, are we still discussing boats?
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Scott B
Back to the twins are better.. Or, are we still discussing boats?
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