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Old 10-01-2019, 12:23 PM   #21
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Does your gray smoke look anything like this? This is how dark my steam was before I cleaned out the heat exchangers. It can get pretty dark gray if it gets hot enough. Click image for larger version

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Old 10-01-2019, 01:18 PM   #22
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great, thanks. this would explain why cleaning the cooling system helped SeaBreeze with a similar issue. and I did not notice any strong odor and the smoke/steam dissipated in a few feet after the boat. I'll get with cooling system cleaning as the first step.
maybe this also explains the high engine room temperature which looked a bit high to me (around 120F after an hour or two of running at 1700RPM) but the water temperature was always in the green zone so i did not pay much attention to it.*
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Old 10-01-2019, 01:20 PM   #23
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> Does your gray smoke look anything like this?

the same color but probably only 20-30% of the volume in your photos after 2200RPM
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