I purchased a 2016 2250 GSR with a 200hp Yamaha motor with very low hours during the summer of 2025. The mechanic, who did my winterization, told me that the Yamaha Outboard needs a new water pump about every 175 hours of use. The Yamaha Outboard on my GSR 2250 has about 180 hours on it. Does anyone know if the Yamaha needs a new water pump about every 175 hours? Thanks!
Water pump
- Thread starter mjaction
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Jack M
Moderator
Most outboard manufacturers recommend every 3 years . That can vary for several reasons. Sand ,high hours or I have seen people ( usually rentals ) dry start. I get mine changed every 3 years , due to shallow sandy conditions where I boat.
Seadoorxpguy
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Better to be proactive than stuck a hour away from the dock with a overheating engine. Sometimes they fail slowly, my buddy boat all of a sudden just tossed the fins and we had to pull it mid season and do it in the marina parking lot after not wanting to do it in the spring when we unwrapped the boats
Potomacbassin’
Well-Known Member
Check your maintenance schedule, but typically it's a check every year or 100hours, then replace every 300. Some impellers last 500+ hours, some last 5 minutes if installed improperly.
Like anything else it all depends on use. One good thing about checking it is that you're at least pulling the lower unit and greasing the drive shaft splines which can seize over time and be an absolute BEAR to get off. Personally if I'm going through the trouble of dropping the lower and pulling the pump cap I might as well replace the impeller as it's not a huge cost. Easy job except getting the shaft key out can be tricky.
I replaced mine at 250 hours, running all fresh water and try not to ingest too much sand/mud. Your results may vary.
Like anything else it all depends on use. One good thing about checking it is that you're at least pulling the lower unit and greasing the drive shaft splines which can seize over time and be an absolute BEAR to get off. Personally if I'm going through the trouble of dropping the lower and pulling the pump cap I might as well replace the impeller as it's not a huge cost. Easy job except getting the shaft key out can be tricky.
I replaced mine at 250 hours, running all fresh water and try not to ingest too much sand/mud. Your results may vary.
lakeliving
Well-Known Member
I’ve run mine to over 300 hours before replacement with the same motor as you. Depends on water you operate in and flushing. Sandy silty water eats them up faster. If it’s peeing decent, it’s still good.
DVW
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My 48 year old fishing motor has the original pump. On my previous pontoon, a couple of impeller blades broke after twenty years. The cooling water indicator was peeing like an old man. Typically that means a blockage of some sort. After not finding blockage I limped back to the dock and replaced the water pump. My friend burned up a impeller in less than a minute by running motor at high speed without cooling water. Rather than a maintenance schedule based on time I would keep a eye on the indicator and replace pump as needed.
Replacing the waterpump impeller is a byproduct of doing other maintenance. Driveshaft spline lubrication is critical to the life of the crankshaft/driveshaft joint, that should be done every 100 hours, on Yamahas with a 25" or longer shaft, need to have the driveshaft support bushing lubricated. In saltwater, all of the fasteners need to be removed, cleaned of salt deposits and relubricated with thread sealant at 100 hours, also gearlube and engine oil change. In other words, since I have the gearcase off anyway, might as well put a new impeller in it.