2001 GT40 cooling problem
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=49873
Printed Date: October-05-2024 at 3:37pm
Topic: 2001 GT40 cooling problem
Posted By: sacramentoboater
Subject: 2001 GT40 cooling problem
Date Posted: June-07-2021 at 10:57am
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New member here, have been following along for a while, appreciate all the great posts. Current issue: Took my 2001 SAN with GT40 engine in for routine oil change/impeller change/spark plug swap. I Have had boat for 5 years and has run perfectly throughout this time. First trip out of marina after maintenance the boat overheated (didn't even make it out of 5-mile an hour zone!). Pulled the boat, did my own impeller swap for a OEM impeller. The "new" one that had been put in by shop was torn and a little shredded. Even after the new impeller swap I couldn't get the boat to suck water from a bucket during an out of water start. I do not think this is a case of clogged tubing given the boat never cooled after impeller change. I appreciate any thoughts on what might be going on. Seems like this should be a simple fix (could the pump have been replaced upsized down?). Thanks, Sacramento Boater
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Replies:
Posted By: 8122pbrainard
Date Posted: June-07-2021 at 11:00am
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Kirt, First, welcome to CCfan. I have a feeling that there's ether a leak that allows air in on the suction side of the RWP or the pump was installed backwards. Post a picture of the RWP. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: sacramentoboater
Date Posted: June-07-2021 at 11:15am
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Thanks for quick reply! I think you can see from the orientation, but this is top down shot looking down what would be connected to the outflow side of the pump. This is the way the shop reinstalled but I'm not sure how to tell if this is the "correct" orientation. 
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Posted By: GottaSki
Date Posted: June-07-2021 at 11:32am
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That appears backerds to me ------------- "There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole |
Posted By: Jonny Quest
Date Posted: June-07-2021 at 12:14pm
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It’s easy to install the raw water pump backwards. I’ve done it myself. Now I take a sharpie marker and write on the pump housing “UP” as a visual reminder… JQ ------------- Current 2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
Posted By: KENO
Date Posted: June-07-2021 at 1:41pm
And here's a picture from here on CCF to back up what's been said already  Yours being a normal rotation LH GT40 the cam screw faces in towards the engine
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Posted By: sacramentoboater
Date Posted: June-07-2021 at 4:32pm
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Great diagram! Flipped the pump and sucking water now! Lesson learned about knowing who to ask for help! Thanks to all. |
Posted By: MrMcD
Date Posted: June-07-2021 at 4:37pm
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I have done it also, the pump installs either way but if the screw faces away from the engine you draw no water. The repair should be on the shop but you can turn it around in 15 minutes. ------------- |
Posted By: 8122pbrainard
Date Posted: June-07-2021 at 5:09pm
Kirt, I certainly hope you inform that shop/so called "marina" that they installed the RWP backwards. I'd print off that illustration Ken posted and drop it off to them!  Any plans on taking the boat back to them?  It's an easy mistake but they should know the difference. Didn't they water test it after the "service"? ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
MrMcD wrote:Posted By: sacramentoboater
Date Posted: June-07-2021 at 9:14pm
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Yes, I called the shop. Got an earnest apology and a refund for the impeller I was previously charged. I told them if they ever have a question about a Nautique to join the CCF forum! :-) Thanks again to all
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