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mattm

Missing Impeller Blades

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mattm

I change my impeller every Spring. This usually equates to about 100-150 hours on the impeller. Normally, the impeller I'm replacing looks virtually brand new. This year though one of the blades had broken off. So, I'm just curious, when these blades brake off where do they go? I've heard of older engine's cooling systems getting gunked up with debris such as this. I felt around in the impeller housing but there was no sign of it.

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SunriseH2OSkier

Not sure if the routing is the same as on my Direct Drive, but typically those pieces end up trapped in the intake end of the trans oil cooler.

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Slayer

Not sure if the V-drive is different, but check the screen on the transmission cooler.

Edit - Looks like sunrise and I typed at exactly the same time.

Edited by inlandlaker

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jkendallmsce

I change my impeller every Spring. This usually equates to about 100-150 hours on the impeller. Normally, the impeller I'm replacing looks virtually brand new. This year though one of the blades had broken off. So, I'm just curious, when these blades brake off where do they go? I've heard of older engine's cooling systems getting gunked up with debris such as this. I felt around in the impeller housing but there was no sign of it.

remove the intake water hose at the engine water pump (the hose from the trans cooler running to the water pump) and back flush it. the missing impellor vane should pop right out the hose.

Edited by jkendallmsce

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Colby2ya

yea it's prolly right before your oil cooler, the vane is to big to go through the tubes on the cooler so it's prolly just sitting right there..

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mattm

Thanks for the replies. I pulled the hose to the tranny cooler today. I didn't find the missing impeller blade. But, I found a birds nest of debris that I've picked up in the lake over the past 4 years. I guess I've found a new maintenance item to add to my list of chores. I'm sure it's in my owners manual if I read it more thoroughly.

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bretski75

Thats good advise. I found at least a whole impellers worth of blades in mine years ago. But I haven't checked since then.

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Iron gator

I installed a raw water strainer with a cleanable screen in it for exactly that problem.

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