why would you think that once every 2 years is a bit much
did anyone have any kind of experience with such impeller? all i found were some speculations about this ....
i am not trying to run engine dry for 15 minutes but just get more life out of impeller without replacing it often
I have no experience with that impeller, but most of the time you can go 3-4 years with the standard impeller without having issues. Yeah, the Merc manual says every 2 years, but it's a bit excessive for many people who only put 20 hrs a year on a boat. I certainly wouldn't be swapping it out just for the ability to run the engine dry. The impeller may not melt, but the rubber exhaust components and water pump housing/seals will melt long before 15 minutes is up.
well, here is a quick example, last summer we were fishing in unfamiliar spot and drew some sand in which cooked impeller within minutes, i wish i had something stronger at that time, so that is why i am asking whether this dry run impeller hold up and at least give that buffer of time to get out of situation like this.