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Dang it, I thought I had a simple problem. My motor overheated while running at full throttle. When putzing along, it seems fine. So I ran it without the thermostat, lo and behold, no overheating. I install a new thermostat, and double dang it, it overheats again. So now I guess I'm gonna get cover gasket and head gasket and see how the passages look. Sound like a plan. It's a 2007, and has been run in the salty stuff.
I just bought the complete water pump kit, gaskets and all for about $70 for my 2001 yamaha 60. It is easy to redo everything if you have some mechanical abilities.
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Oh, I forgot to mention, pump impeller was replaced maybe 6 mos ago, ran fine and fast all spring. Never overheated. And it has a very strong stream (unlike me)!
SlabQueen said that you need to slow down and fish...rotfl...Quote:
Originally Posted by Slab
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Slab , could very possibly be a piece of trash from the impeller change is causing a blockage at high rpm / pressure. That is 1 of several reasons that I opted for redoing the entire water system for a few dollars more. When I do it, everything will be new and completely cleaned out.
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The previous impeller was intact, not in pieces. But still, I'ma gonna open her up and look inside. Taking the head off for a look see.Quote:
Originally Posted by RobAnderson
With it running okay without the tstat makes me think a partial blockage somewhere. Without the tstat you decrease the pressure going through the system. In my saltwater days we changed impellers , tstats and pressure washed the entire cooling system at the end of summer. Saltwater will have a tendency to cause water jacket to rust internally. I could be wrong just ask my wife...lol
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Attachment 360565
Plenty dirty in there. But nothing that's causing blockage IMHO. So dono. I'm just gonna clean it all up and replace the temp sensor, and see what happens! Hoping it's just a bad temp sensor!
Attachment 360566
Not really as dirty as you would think in the water jacket
With the tstat installed it could easily be enough restriction to cause it to get warm. But now that you mentioned it that temperature sensor is one of the few issues with yamaha outboards.
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You mean the temp sensor goes bad a lot? Ahh, that would be great. And the cleaning the motor got is good too, really needed it. And some head bolts at the bottom were really corroded. In two years I'd be they would not come out at all, so lots of anti seize should take care of that problem.Quote:
Originally Posted by RobAnderson
Oh, anyone know what temp these engines should run at. I have one of those point and shoot temp gauges, I could run it and check the temp if the alarm sounds. I do have a sensor coming, but it'll be three or four days. And I wanna fish.....!
Attachment 360584
Water is coming out the thermostat hole!
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https://youtu.be/J1tA4lUHJPE
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All this reminds me that I unplugged my sensor over a year ago and forgot to replace it. I am going tonight, I will shoot my motor after running and let you know in the morning. Most common failure on our motors is that sensor.
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Ed,Quote:
Originally Posted by Slab
Had a over-heating problem w/new Suzuki outboard once, temperature sensor was jumping 40 degrees after warmed up for 10 minutes on plane, computer would tell the cylinders to cut out, long story short a $5 resistor inline cured the situation, think your on to something w/temp sensor...
I’m with the general consensus, the schmutz that had built up didn’t help. My temp sensor is suspect too but I have no thermostat. When it runs WOT for a while the stream is very hot. I have a trip through mine in the near future too. Not because I have a problem, but because I want to be sure I don’t get one later. Mine had lots of salt use. Good luck with it boss..
Well, put it all back together yesterday and ran it. I only did a circle near the house I did not have time. It did not over heat, but I'm not confident that I fixed anything. I'm still awaiting the temp sensor. Thinking that'll fix it. Who knows, maybe the crud I cleaned out put it over the line and made it over heat just a hair. Hopefully I get a chance to run it today for a good test.
I’m betting (hoping) temp sensor!
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