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overheating

Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=26782
Printed Date: November-18-2024 at 10:21pm


Topic: overheating
Posted By: jsingleton
Subject: overheating
Date Posted: July-03-2012 at 2:13am
Every weekend when i put the boat in, it sits aroun 200-220 degrees at idle and drops to around 180 when in gear.I dont know much about these things seeing as i just bought my first.its a 79 and ive heard someone say check the impellar, but i dont knoow whered id find it.any help??
ALso, my oil pressure drops to 20 at idle andd moves to 40 after in gear...thats after i did a ooil change.It sat at 60 before hand.I used 40 weight oil and changed the filter.Any suggestions??



Replies:
Posted By: Bri892001
Date Posted: July-03-2012 at 12:51pm
Check this out as a place to start for your overheating. There have been several recent threads too, so look around a bit on this site:
http://www.skidim.com/Faq_TROUBLESHOOT.asp#RWTS" rel="nofollow - http://www.skidim.com/Faq_TROUBLESHOOT.asp#RWTS

Impellers and air leaks on the suction side of the system are common culprits.


Posted By: Jllogan
Date Posted: July-03-2012 at 12:56pm
that oil pressure sounds like good levels to me, it usually will drop at an idle. Did you switch weights of oil after the oil change? 60 sounds high, I dont think mine has ever been that high.

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http://correctcraftfan.com/diaries/details.asp?ID=5792&sort=&pagenum=1" rel="nofollow - 1986 Ski Nautique 2001





Posted By: jsingleton
Date Posted: July-03-2012 at 5:37pm
The last owner said he used 40 weight so i did too.what ddoes your usually sit at when at idle?i thought it should be stable, like a vehicle.
And where might the impeller be found at?


Posted By: Bri892001
Date Posted: July-03-2012 at 5:47pm
Pretty good overview on impeller replacement:
http://aquaskier.com/articles/impeller_replacement.htm" rel="nofollow - http://aquaskier.com/articles/impeller_replacement.htm


Posted By: Daytoman
Date Posted: July-05-2012 at 2:29am
On your overheating problem...Like Bri said...it SOUNDS like there is a leak somewhere, so when youre idling, it could be sucking in air so less water is getting to the motor, then when you throttle up and get moving your sucking in more water so it cools down. This happened to me once and it was a crack in my fresh water filter cover that I couldnt see easily and it was sucking in air. I finally notided that it was only half full at idle and my motor heated up but then as I got underway it filled up and the motor cooled down. Luckily it was an easy fix.

I dont think its your impeller because they normally shred when they go bad and when that happens...well its normally just bad news. But it doesnt hurt to change it now. I'd start lookig for a leak in the fresh water cooling department.


Posted By: jsingleton
Date Posted: July-05-2012 at 4:44pm
i will deff checck into that! thanks for the advice!


Posted By: Jllogan
Date Posted: July-05-2012 at 5:18pm
when the oil is really heated up my pressure is like 30 psi at an idle and 50 while running. Thats with 20W50. Also I dont think electric oil pressure gauges are always super accurate but 20 seems like enough at an idle. Just keep an eye on it I would say.

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http://correctcraftfan.com/diaries/details.asp?ID=5792&sort=&pagenum=1" rel="nofollow - 1986 Ski Nautique 2001





Posted By: GlassSeeker
Date Posted: July-05-2012 at 6:27pm
the overview in aquaskier made a good point that the impeller loses efficiency --- so even if your impeller has not failed it becomes less efficient and should be replaced regularly --which prevents you from ever having an impeller break apart and keeps your water intake maximized.

up under my dash I zip tie a spare impeller-- the #1 spare item to keep on the boat.

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This is the life


Posted By: N2Deep
Date Posted: July-05-2012 at 6:28pm
Plus the tools to change it if out on the water :D

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1991 SN pulled by a 2010 Tundra


Posted By: Jllogan
Date Posted: July-05-2012 at 6:41pm
I have one of those little tool sets in the boat at all times. I unfortunately have to use it all to often.

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http://correctcraftfan.com/diaries/details.asp?ID=5792&sort=&pagenum=1" rel="nofollow - 1986 Ski Nautique 2001






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