Re: Alpha 1- what is up with my drive?
The lower 1/2 looks clean because it's Always In the water.......<br />The upper 1/2 is in the Air, when it's Working the hardest,+ it's as Hot as it gets........<br />That's when it's Splashed with dirty water, which evaporates,+ leaves the Dirty.........

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If it is in fact be caused by the "kettle effect", is the heat that causes that enough to cause mechanical problems?
"kettle effect", I've never heard it called that,<br />But, Ayah, That's what it is........<br />Your outdrive is Aluminum.... 1 Great Big Heatsink Oil Cooler.....<br />It works Perfectly.......... When used within it's Design Limitations.........

<br /><br />I run Mobil 1 75W-90 Syn in mine... I think it Helps...<br />I've thought about building or adding a cooler... but I'm sure that it's not necessary in My case, on this boat anyway.............<br />BTW, a shower will Add to the build-up......
