searun
Well-Known Member
Nice work on changing out the impeller. These days the recommended interval for changing out the impeller and also thermostats is 300 hours. I put 300 hrs/season on my engines so both are now on my annual maintenance list. Same too for changing both internal and external zincs. Easy to forget about the internals, and the pic below shows you how much they wear out from doing their job after 300 hours.






