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89 ski nautique questions

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=10781
Printed Date: September-29-2024 at 5:28am


Topic: 89 ski nautique questions
Posted By: rjjmorgan
Subject: 89 ski nautique questions
Date Posted: June-09-2008 at 2:13pm
I have 2 questions:

My throttle control backs down when i take my hand off it. Is there an adjustment or do i buy a new one. If new one where do I get one??


Also my boat runs 180 cruising slow and around 200 going fast. Raw water pump rubber looks great. How hot should it run?    



Replies:
Posted By: 79nautique
Date Posted: June-09-2008 at 2:20pm
well the return spring on the carb might be a little strong causing the throttle issue.

for the running hot I would say you have an automotive t-stat (180) when you need a 142 marine t-stat that will keep it around 160.

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http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique


Posted By: TRBenj
Date Posted: June-09-2008 at 2:52pm
Originally posted by 79nautique 79nautique wrote:

well the return spring on the carb might be a little strong causing the throttle issue.

for the running hot I would say you have an automotive t-stat (180) when you need a 142 marine t-stat that will keep it around 160.


Agreed. Not sure if a proper stat will help the the fact that it heats up when running hard, though. If it heats up AFTER running hard, thats normal- but it should stay coolest when youre running the most water through the engine. Id take a closer look to see if there are any blockages in the coolant paths (from a fragged impeller). If not, it could be the seal on the pump going.

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Posted By: behindpropeller
Date Posted: June-09-2008 at 4:57pm
Turn all of your switches off and tell me what the gauge says. Due to poor grounding you will find that the temp meter will jump 5 deg. for each switch you have on.

As for the thermostat, a 160 tstat will keep it at 160, and 142 will keep it at 142. So use the correct 160 tstat.

Tim

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Posted By: 79nautique
Date Posted: June-09-2008 at 5:02pm
Originally posted by behindpropeller behindpropeller wrote:


As for the thermostat, a 160 tstat will keep it at 160, and 142 will keep it at 142. So use the correct 160 tstat.

Tim


that's not true, it opens at that temp but will not keep it at that temp, usually about 10-15 hotter than the rated opening temp.

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http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique


Posted By: behindpropeller
Date Posted: June-09-2008 at 5:03pm
So why does the manual call out for a 160 then??

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Posted By: TRBenj
Date Posted: June-09-2008 at 5:37pm
Originally posted by behindpropeller behindpropeller wrote:

So why does the manual call out for a 160 then??

I havent read that page in the manual, but Correct Craft's recommendation is for the 143 in carb'd boats, 160 in EFI. I run the 143 and the boat stays at 160. Joel confirmed that a 160 stat in the same boat kept the temp at 180.

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Posted By: 79nautique
Date Posted: June-09-2008 at 5:41pm
Originally posted by behindpropeller behindpropeller wrote:

So why does the manual call out for a 160 then??


it's not in the PCM manuals

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http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique


Posted By: SNobsessed
Date Posted: June-10-2008 at 1:16am
RJ - My boat was running 'hot' at higher speeds. Turned out to be a loose wire connection at the sender. FYI

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“Beer is proof that God loves us and wants us to be happy.”

Ben Franklin



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