How To: Nissan Tohatsu Outboard Engine Water Pump Impeller Install
I couldn’t find any good how-to information on the Internet on replacing the water pump on small Nissan-Tohatsu outboards, so I went to the my local Nissan-Tohatsu Marine dealer and the owner there was nice enough to give me some pointers when I bought the replacement water pump impeller. It wasn’t difficult to do; it took us about 3 hours to change the water pump, the fuel filter, the engine oil & engine oil filter, the spark plugs and the gear lube in the foot.
The water pump gave me some concern because I’d just purchased the outboard and I’ve never done one before, I’d seen it done once on a large outboard, but I’d never personally changed one. I’m sure glad I did it though, there were only 2 fins still intact — that water pump impeller was destroyed! Hopefully this will help someone else that may be facing the same problem. Here is what we did, step-by-step. Pay it forward, right?