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crazy temperature swings

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=49899
Printed Date: July-15-2024 at 8:28am


Topic: crazy temperature swings
Posted By: BaccoBouncer
Subject: crazy temperature swings
Date Posted: June-12-2021 at 6:24pm
I just put in a new thermostat and raw water impeller.  It is the correct thermostat from discount inboard marine (I think a 140F).  We were just out and cruising slow, just off idle.  The temp ran up to over 200F and then when I started moving faster it went down to 120F.
Yes I put the key into the impeller shaft. It's a half moon key and I'm pretty sure if it came out when I inserted the impeller I wouldn't be able to put the cover on.

Where to start?


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'97 21' Sport Nautique


Replies:
Posted By: BaccoBouncer
Date Posted: June-12-2021 at 6:25pm
Could I have air in the block?  Is there somewhere to bleed the block?

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'97 21' Sport Nautique

Posted By: Gary S
Date Posted: June-12-2021 at 6:47pm
140 for carbed engines, 160 for fuel injected. You most likely have an air leak somewhere on the intake side of the pump. Check all the hose connections,use a socket to tighten clamps and check the strainer and it's gasket

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http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS
95 Nautique Super Sport


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