Manufacturer Recommended Service
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Service: | Raw Water Imepeller |
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| Manufacture: | Indmar, MerCruiser and Volvo Penta | |
| Link: | http://www.indmar.com/About/ContactIndmar/Manual_2003_Presentweb.pdf http://www.mercurymarine.com/serviceandwarranty/mercruiserfaqs/maintenance.php |
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| Description: | The neoprene rubber raw water impeller draws fresh water into the engines cooling system. A failed impeller will cause over heating, which can lead to many different and costly types of engine damage. At left is a failed impeller. The seperated pieces of rubber can circulate into the engine and cause blockages, leading to added over heating problems. Image on right is a new impeller. Procedure: Inboard: Remove raw water cover and utilizing an impeller puller, remove impeller from splined pump shaft. Refit new impeller and re-install cover with new gasket. Run engine and check for proper water circulation. Sterndrive / Outboard: Seperate lower unit gear case from outdrive. Remove water pump housing. Replace impeller, base plate and seal. Reassemble housing and re-install gearcase on outdrive. Run engine and check for proper water circulation. |