Water pump impellor

[Johnscubanut]

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

[yam man]

Yes remove lower unit. Because you will have gone that far stick a new 1 in

[Johnscubanut]

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?

[A1an]

Originally Posted by Johnscubanut

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.

[Locozodiac]

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