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Old 03 March 2014, 09:47   #1
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Water pump impellor

Hi guys, question for you all.

On an engine service, do you have to physically remove the lower gear leg to check the impellor or do engineers not need to? (i.e do they a use a flow gauge of some sort?)

Welcome any replies

cheers
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Old 03 March 2014, 11:10   #2
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Yes remove lower unit. Because you will have gone that far stick a new 1 in
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Old 03 March 2014, 12:25   #3
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Yes, I agree with you, but the question was, how can they check if the pump is ok if they don't remove the lower leg?
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Old 03 March 2014, 12:32   #4
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Quote:
Originally Posted by Johnscubanut View Post
Yes, I agree with you, but the question was, how can they check if the pump is ok if they don't remove the lower leg?
If you mean PROPERLY check the impeller then they can't, it needs to be a visual inspection.

A water pressure gauge can indicate a good flow but it can't tell you the condition of the rubber.
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Old 03 March 2014, 20:15   #5
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If peeing port has low water volume, is intermitent, assuming it's completely clean or engine overheats, U need definitely a new impeller. Only Superman could check with his X Ray Vision impeller cond without removing lower leg.

Not all impeller brands lasts same, Tohatsu's are the best in long term longevity.

Happy Boating
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