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89 ski nautique questions |
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rjjmorgan 
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Joined: September-22-2007 Location: United States Status: Offline Points: 12 |
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 Topic: 89 ski nautique questionsPosted: June-09-2008 at 2:13pm |
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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? |
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79nautique
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Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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Posted: June-09-2008 at 2:20pm |
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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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TRBenj
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Joined: June-29-2005 Location: NWCT Status: Offline Points: 21184 |
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Posted: June-09-2008 at 2:52pm |
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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behindpropeller
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Joined: July-31-2006 Status: Offline Points: 1810 |
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Posted: June-09-2008 at 4:57pm |
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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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79nautique
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Posted: June-09-2008 at 5:02pm |
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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behindpropeller
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Posted: June-09-2008 at 5:03pm |
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So why does the manual call out for a 160 then??
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TRBenj
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Posted: June-09-2008 at 5:37pm |
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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79nautique
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Posted: June-09-2008 at 5:41pm |
it's not in the PCM manuals |
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SNobsessed
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Joined: October-21-2007 Location: IA Status: Offline Points: 7102 |
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Posted: June-10-2008 at 1:16am |
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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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79nautique wrote: