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Water Pump Impeller 2005 CRF250R

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im helping a friend out with his bike and i took off the water pump cover but i cant figure out how to take off the impeller? anybody know?

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i get that but the bolt thats a 10mm is a solid mount to the impeller to when i turn it to the left it just turns with it. i cant really jam anything in there to stop it from turning cause its a solid mount you know what i mean? if you could take a picture of it that could help but i doesnt say anywhere in the service manual of how to do it. like a front sproket you can jam a wrench in there and it wont move so you can remove the bolt but there is no bolt its all one piece with the impeller. any advice will help

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Put it in gear, lock up the rear brake and give the ratchet/socket a quick hit.

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i had the experience with my 04 crf 250 and i do not believe the impeller thread has changed from 04-05. you will need an impact wrench. MAKE SURE it is set the right way or YOU WILL toast the old impeller. i did it and its not an easy ordeal. if you do it right the thing will just zip right off the shaft. good luck

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