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Water Impeller Alpha Gen 1 versus Gen 2 - different schedule?

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A quick DIY question...

I'm going from an Alpha 1 Gen 1 into a Gen 2 outdrive. Since I don't know when the impeller was last changed, I got a repair kit and was surprised at how big the Gen 2 impeller was compared to the Gen 1.

So that begs a couple questions...

1) Does the Gen 2 move more water through the engine because of its size?

2) Does the "every other year" rule of thumb still apply?

Thanks guys!

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Yes, Gen2 impellor is a low pressure high flow design where as the Gen1 is a high pressure low volume. I have gone 8 years on my impellor before changing it and if it wasn't for the curl in the blades of the old one I would have a hard time telling the old from the new. My belief is that the life of the impellor is directly related to the operating environment. If you are sucking garbage up all the time and running it dry then it isn't going to last.

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That looks nice, Rich. Looking forward to more pics. Yeah, Gen 2 impellers are an improvement over the previous ones and do last longer. That being said, I still change mine every third year. All the ones that have been changed out have still looked good, though.

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5+ years in freshwater is not uncommon. Unlike the R/MR Alpha 1, the Gen II requires you to drain the gear oil first before splitting the drive apart. Recommend doing when the gear oil is due to be changed.

Getting some Quicksilver Perfect seal to do the impeller helps too. Ziplock bag.

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