Water Pump Impellers Service Life
Posted: Wed Nov 20, 2019 9:56 am
I have a question regarding the water pump impeller. The outboard I am thinking of buying has an recommended interval of 300 hours between impeller replacement cycles.
Q1: If the boat has only run in fresh water why would one need to change the impeller at 300-hours--or for that matter at all?
[To jimh specifically in a prior thread about E-TEC engines:]
Q2: Did you notice any wear (erosion or corrosion) on the impellers that were removed from you're E-TEC?
I am assuming the maintenance recommendation is based on erosion and corrosion concerns and the maintenance interval is based on most adverse operating conditions , which would be saltwater v. fresh water.
Q1: If the boat has only run in fresh water why would one need to change the impeller at 300-hours--or for that matter at all?
[To jimh specifically in a prior thread about E-TEC engines:]
Q2: Did you notice any wear (erosion or corrosion) on the impellers that were removed from you're E-TEC?
I am assuming the maintenance recommendation is based on erosion and corrosion concerns and the maintenance interval is based on most adverse operating conditions , which would be saltwater v. fresh water.