Thanks: 
Reply With QuoteRan without oil to me. The aluminum can grip like no other metal except maybe Titanium. Not sure how you would repair the Head casting but someone might. I will check my Yamaha 4 Stroke rebuilder and see what he says.
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Founder Crappie.com Est.1996
f100 - cams are out...
Not looking good...
Owner
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Ran without oil to me. The aluminum can grip like no other metal except maybe Titanium. Not sure how you would repair the Head casting but someone might. I will check my Yamaha 4 Stroke rebuilder and see what he says.
Jamesdean LIKED above post
Founder Crappie.com Est.1996
Heads out. And to me it looks OK!
And Rojo, I see some heads for sale on Ebay, and guess what, their top cam bearing looks same as mine, bad! lol
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This is a snapshot of one being sold on eBay. I'd say mine looks better, at a bit better. Doh
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And here's my bad one above.
The other one of my cam bearing below is gooderer:
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Looks like the bearings were turning in their seats. That happens when ran with no oil.
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Bill H. PTC USN Ret
Chesapeake, Va
Founder Crappie.com Est.1996
These cam bearings are not separately replacable. The whole head would have to spin! lolOriginally Posted by Barnacle Bill
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May just be normal wear patterns. I would think that the cam shaft would have galded aluminum stuck to it if it ran without oil.
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Camshaft side looks fine, smooth as silk.
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I am wondering if the marks are from start up. At times outboards sit for long periods of time. Sure could have less than optimum lubricant until oil pressure is built up. Engines would probably last a lot longer with an electric oil pump to get oil up into the motor before it was started.
