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Old 27 March 2012, 16:39   #11
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Remember this? Honda 130 Guess what the "problem" was?

I normally remove the thermostat on my own outboard once a year to check. You can guarantee there will be salt build up in the cooling passages, and this is on an outboard that's flushed after every trip. For those that can't flush until the end of the season, then the very least they should do is check the sacrificial anodes are doing their job and replace when necessary. Also read about outboards that have developed corrosion due to accelerated electrolysis, possibly due to poor grounds on electrical devices, etc.
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Old 27 March 2012, 17:29   #12
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If you have a new engine with a 5 year warranty, you would assume that the dealers test tank would be a fresh water one. So as long as you are getting it serviced I would say you don't need to flush it out yourself.
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Old 27 March 2012, 17:57   #13
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I flush every time I go
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Old 27 March 2012, 18:00   #14
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Quote:
Originally Posted by tony t View Post
I flush every time I go
and at your age that'll be every hour
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Old 27 March 2012, 18:02   #15
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and at your age that'll be every hour
Make that 20 mins
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Old 27 March 2012, 18:28   #16
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I flush every time I go
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Old 28 March 2012, 02:10   #17
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So if I can't flush regularly how long should I flush for when I have the chance ?
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Old 28 March 2012, 04:03   #18
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About once every month or once every two or three trips out
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Old 28 March 2012, 04:13   #19
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I think that seeing as you raised the question, you should be a "guinea pig" for all of us. Don't ever flish the engine and then report back regularly and let us know if you have any problems. That way, if anyone asks this question again we can point them directly to you!!!!
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Old 28 March 2012, 04:29   #20
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Yes without a doubt, More so on four stroke engines!!. I could show you all sorts of photos from engines that have not been flushed every now and then.
Turbodiesel,

Do the 4 strokes have higher temp thermostats to allow higher running temps and better emissions?

Salt should only precipate out at about 65C or above.

Most two strokes run pretty cool when running at any speed with the thermostats only coming into play when running slowly to allow smooth idle on a 2 strike I believe.
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