[Capt_Mac]

I replace my pump and change my lower unit oil once a year, I don't know where your running at but I run around the flats in the keys for lobster several times a year and sand in the impeller pump is not a good thing. Just make sure to have some thick grease(makes the job easier especially for keeping the key in place) and don't forget to reattach the shifter rod which is probaly inside of your cawling.