4.3 Mercruiser

robz192

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May 18, 2019
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I have a Searay 195 with a 4.3 Mercruiser, today I released the water out with the single point drain system, I noticed some fluid came out, bluish like the drive lube, the drive lube resorvoir is quite low & was serviced not that long ago. I hooked up the muffs, gave it a good flush, turned it off, drained it again seemed clear, repeated that once more & seemed clear. Has anyone else experienced this?
 

Bondo

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Apr 17, 2002
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71,310
Ayuh,....... Welcome Aboard,..... The drive oil has nothing in common with the cooling system, so I can't see what you describe happening,.....

If the seals were gone in the raw water pump, it's more likely you'll see water in the drive oil, than gear oil in the cooling system,......
 

H20Rat

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Mar 8, 2009
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It is this in concentrated form, assuming some of the other chemicals in it evaporated away.
 

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Bt Doctur

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today I released the water out with the single point drain system, I noticed some fluid came out, bluish like the drive lube

If water came out you did something wrong during the winrerizatiion . if whatever color AF you used came out the same as it went in your good
 

robz192

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May 18, 2019
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If water came out you did something wrong during the winrerizatiion . if whatever color AF you used came out the same as it went in your good

Thankyou, I’m in Australia, it’s not quite winter yet, had a couple of light frosts but never seen this before
 
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