Not Pulling Water from Lake
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=2255
Printed Date: November-23-2024 at 3:47am
Topic: Not Pulling Water from Lake
Posted By: Bhedbloom
Subject: Not Pulling Water from Lake
Date Posted: August-15-2005 at 7:27pm
I sure could use some assistance with this one. My 1970 Mustang overheated at the lake last weekend and here is what I have done so far. Replaced the Thermostat, Temp. Sending Unit, and the Impeller.
What I have figured out since is that the pump will not pull water from the lake or from the "Fake a Lake" in the drive way (it always has in the past), but it works just fine if I direct hook the garden hose to it and put it under pressure. I have never had this problem over the 7 years I have owned the boat. Why in the world would the pump not pull water? What should I check next? Thanks for any and all help! I have two pick-ups on the boat.
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Barry, South Carolina
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Replies:
Posted By: Jim_In_Houston
Date Posted: August-15-2005 at 8:03pm
I had the same problem with my '68. Replacing the impeller did not help. I took the pump apart and found deep grooves worn into the brass housing. I polished them out with an emery cloth wheel and a hand drill. I bought a complete rebuild kit which included a brass wear plate that screws in the pump housing and a new bearing. The bearing looks to be made of some kind of ceramic material. When trying to remove the old bearing it just cracked and split in two. The new bearing was easy to install by aligning it carefully and gently tapping it in with a small hammer and an appropriate sized socket used as a "bearing driver tool". The bearing was beveled on one end to help it self-align when installing.
This cured the problem and the pump now sucks like crazy.
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Happy owner of a '66 and a '68 Mustang
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Posted By: workky
Date Posted: August-15-2005 at 9:05pm
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make sure from the pump back to the pickup,there is no airleaks.I had a cracked raw water strainer and my boat overheated.The air leak caused it to loose suction
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Posted By: Bhedbloom
Date Posted: August-15-2005 at 11:37pm
Jim,
Where did you purchase the rebuild kit. I'm sure it is due for one. The brass wear plate on my pump is a little worn, but the inside is very smooth. I can imagine the bearing in mine might need replacing. Thanks!
Workky,
Good call! Thanks, I'll check that next.
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Barry, South Carolina
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Posted By: mrese
Date Posted: August-16-2005 at 3:56am
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Check out the FAQ on the Discount Inboard Marine website (a sponser's on this site) They have a great troubleshoot procedure for overheating.
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Posted By: skyhawkflyer
Date Posted: August-16-2005 at 10:28am
Did you have the pump off????
If it's like my 87, with the Sherwood pump it will go on either way (and both ways will appear right). I had the same exact problem about 2 years ago with the same symptoms. I flipped the pump 180 degrees and everything started cooling again. Since, I marked the pump so I wont make that mistake again.
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Posted By: Jim_In_Houston
Date Posted: August-16-2005 at 10:36am
Barry, I think I bought it from SKIDIM. They did not have the kit listed but I gave them the numbers off my pump housing and they sent the correct kit. The part number stamped into the pump housing was not visible until I took the pump apart.
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Happy owner of a '66 and a '68 Mustang
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Posted By: Bhedbloom
Date Posted: August-19-2005 at 7:39pm
Thanks Fellows,
I think I found the culprit with your help. It might have been sucking some air. I tightened all the band clamps leading from the pick-ups to the pump and it will pull water now. It does however still run hot. I have another post on that problem. Happy Boating!
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Barry, South Carolina
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Posted By: captan1
Date Posted: August-19-2005 at 10:10pm
Also the oil cooler for the tranny, if you've never looked inside one all the cooling water tubes can clog up and might need pressure to flow water.
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http://www.correctcraftfan.com/diaries/details.asp?ID=452&sort=&pagenum=1&yrstart=1978&yrend=1978 - 1978 Ski Nautique
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