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Jan 23rd, 2013
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Is this a casting defect from Yamaha factory #14409074 06/30/22 08:11 PM
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I purchased a lower unit in 2018 for my 2001 225 OX66. I usually don't wait this long before replacing impeller, because they always have looked good in the past, anyway I thought it was time to change impeller because I was getting no water from pee hole, so I did. This is the impeller housing as it came from factory. It appears to be a blob of whatever the housing is made from. The blob was hard, and pieces have broken loose and scratched the plate and impeller cup. Does anyone know what this is from? [Linked Image]
[Linked Image]

Re: Is this a casting defect from Yamaha factory [Re: RL206] #14410588 07/02/22 06:22 PM
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ssmith Online Content
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looks like it was run hot an melted seen this before will slow down the volume of water going to the water pressure to the powerhead.

Re: Is this a casting defect from Yamaha factory [Re: RL206] #14410630 07/02/22 07:06 PM
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I'm thinking maybe the metal impeller cup is spinning in the housing. This motor has never been started without a water supply so not sure how it got hot.

Re: Is this a casting defect from Yamaha factory [Re: RL206] #14411062 07/03/22 03:32 PM
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if it has been 4 yrs. since the last one, or longer, it could have easily had sand or something pulled thru it that would scratch, it could cause loss of water pressure.

my best guess


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Re: Is this a casting defect from Yamaha factory [Re: RL206] #14412281 07/05/22 12:48 PM
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boatman025 Online Content
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That motor was run without water they just don't melt unless impellers runs dry


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Re: Is this a casting defect from Yamaha factory [Re: RL206] #14412296 07/05/22 01:05 PM
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I posted an answer over on the BBC thread you started.

Re: Is this a casting defect from Yamaha factory [Re: RL206] #14412805 07/05/22 10:34 PM
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Melted. Seen it 100 times, as stated above they get that way from heat and/or being run dry.


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Re: Is this a casting defect from Yamaha factory [Re: RL206] #14414366 07/07/22 07:39 PM
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I think I know what happened, it had to be this because it's never been started without flooding impeller first. I pulled up on shallow bank and while backing off bank I may have trimmed it out of water for a split second, plus the mud and sand that was stirred up didn't help. Thanks for help

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