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BF115 Waterpump

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fishnmaine

Contributing Member
I have a 2017 Honda BF115 I got maybe 60 hrs on it. Should the water pump be changed even though it has low hours but " Its 7 Years old". I works perfectly fine good strong waterflow. I know you should change it every 100 to 200 hrs. Thanks
 
Yes. At the very least the impeller should be changed and the rest of the water pump assembly inspected. While your in there the drive shaft and shift rod splines should be given a fresh coat of grease.
 
Hi,

Well, all situations and conditions being different, it comes down to the old "it depends".

Yes, that much time can be a factor in the deterioration of the pump impeller but it's not the only one. Sitting isn't ideal for the rubber but it's going to be much worse if it were outside in large temperature swings like the desert or, in Maine, freezing conditions. Even then, my guess is the desert situation would be much worse.

In both cases the scenario gets alot better if the storage is indoors or very sheltered and somewhat insulated conditions.

I've seen impellers that have lasted much longer but, of course, it's not ideal to "push it".

My opinion is that you might easily get away with another season of use since it seems to be working well now. That would allow you to use it this spring while developing a plan and gathering parts.for replacement service.

Still, would you want to do that?

Considering that replacement isn't particularly expensive or difficult to do, I don't think that I would take that gamble.

Thinking about it this way, would have me wanting to change it out.....

.....The 115 is a very nice and, also, a very expensive outboard. A majority of catastrophic engine failures are linked to failure of the cooling system. Some estimates are as high as 70%.

An older impeller is much more likely to fail suddenly. While the outboard is equipped with "guardian mode" that warns the skipper with light and buzzer and de-rates the power to "limp in", it is still never ideal to get into that situation.

An overheating engine can likely suffer some damage no matter how quickly you notice it or the protection system activates. So, even if the effects are usually very slight on these modern engines, I wouldn't want it to happen at all.

Again, just my opinion but YOUR choice.

Good luck.

P.S. I always advocate to replace the entire pump kit rather than just the impeller.
A new impeller placed into even a pump liner that's only slightly worn will still be less efficient.
 
jgmo said:
Hi,

Well, all situations and conditions being different, it comes down to the old "it depends".

Yes, that much time can be a factor in the deterioration of the pump impeller but it's not the only one. Sitting isn't ideal for the rubber but it's going to be much worse if it were outside in large temperature swings like the desert or, in Maine, freezing conditions. Even then, my guess is the desert situation would be much worse.

In both cases the scenario gets alot better if the storage is indoors or very sheltered and somewhat insulated conditions.

I've seen impellers that have lasted much longer but, of course, it's not ideal to "push it".

My opinion is that you might easily get away with another season of use since it seems to be working well now. That would allow you to use it this spring while developing a plan and gathering parts.for replacement service.

Still, would you want to do that?

Considering that replacement isn't particularly expensive or difficult to do, I don't think that I would take that gamble.

Thinking about it this way, would have me wanting to change it out.....

.....The 115 is a very nice and, also, a very expensive outboard. A majority of catastrophic engine failures are linked to failure of the cooling system. Some estimates are as high as 70%.

An older impeller is much more likely to fail suddenly. While the outboard is equipped with "guardian mode" that warns the skipper with light and buzzer and de-rates the power to "limp in", it is still never ideal to get into that situation.

An overheating engine can likely suffer some damage no matter how quickly you notice it or the protection system activates. So, even if the effects are usually very slight on these modern engines, I wouldn't want it to happen at all.

Again, just my opinion but YOUR choice.

Good luck.

P.S. I always advocate to replace the entire pump kit rather than just the impeller.
A new impeller placed into even a pump liner that's only slightly worn will still be less efficient.
Click to expand...
Thanks for that write up greatly appreciated. Never done one before, but it looks fairly easy to do. Thank god I'm mechanically inclined lol
 
Yes, it's probably one of the most straightforward tasks besides changing the oil or spark plugs but I've never done it on a 115 and, you not ever having done one before, even that might pitch you a curve or two.

If you are going to do your own maintenance and repairs, I highly recommend having the shop service manual. Because, there often can be little "surprises" like hidden or difficult to see bolts on some models and other "nuances" like water tube alignment and impeller arm direction on a pump job.

Pretty much ALL Hondas need a valve adjustment from time to time to keep them tip-top and having reliable specs handy about everything is value enough as an argument for having the manual.

If you want the genuine paperback edition it can be orfered here:

Honda Marine | Shop Manuals Publications | Honda Power Products Support Publications

publications.powerequipment.honda.com publications.powerequipment.honda.com

Yes, not cheap but I wouldn't own a Honda outboard and not have one.

If that price isn't in the budget then there are digital alternatives for much less. Just be cautious about where you source one because I think most are copies and I don't believe Honda offers that media. There are others here that have them and could provide you with a link. Sorry, but I can't.

Best of luck.
 
jgmo said:
Yes, it's probably one of the most straightforward tasks besides changing the oil or spark plugs but I've never done it on a 115 and, you not ever having done one before, even that might pitch you a curve or two.

If you are going to do your own maintenance and repairs, I highly recommend having the shop service manual. Because, there often can be little "surprises" like hidden or difficult to see bolts on some models and other "nuances" like water tube alignment and impeller arm direction on a pump job.

Pretty much ALL Hondas need a valve adjustment from time to time to keep them tip-top and having reliable specs handy about everything is value enough as an argument for having the manual.

If you want the genuine paperback edition it can be orfered here:

Honda Marine | Shop Manuals Publications | Honda Power Products Support Publications

publications.powerequipment.honda.com publications.powerequipment.honda.com

Yes, not cheap but I wouldn't own a Honda outboard and not have one.

If that price isn't in the budget then there are digital alternatives for much less. Just be cautious about where you source one because I think most are copies and I don't believe Honda offers that media. There are others here that have them and could provide you with a link. Sorry, but I can't.

Best of luck.
Click to expand...
Thanks I’ve already thought about getting the OEM manual. I do the same for my vehicles worth the money. Watched plenty of videos. Looks fairly simple. But like you said, there’s always something that will pitch you a curve or two. Thanks again jgmo !
 
jgmo said:
Yes, it's probably one of the most straightforward tasks besides changing the oil or spark plugs but I've never done it on a 115 and, you not ever having done one before, even that might pitch you a curve or two.

If you are going to do your own maintenance and repairs, I highly recommend having the shop service manual. Because, there often can be little "surprises" like hidden or difficult to see bolts on some models and other "nuances" like water tube alignment and impeller arm direction on a pump job.

Pretty much ALL Hondas need a valve adjustment from time to time to keep them tip-top and having reliable specs handy about everything is value enough as an argument for having the manual.

If you want the genuine paperback edition it can be orfered here:

Honda Marine | Shop Manuals Publications | Honda Power Products Support Publications

publications.powerequipment.honda.com publications.powerequipment.honda.com

Yes, not cheap but I wouldn't own a Honda outboard and not have one.

If that price isn't in the budget then there are digital alternatives for much less. Just be cautious about where you source one because I think most are copies and I don't believe Honda offers that media. There are others here that have them and could provide you with a link. Sorry, but I can't.

Best of luck.


Even with low hours, it's a good idea to replace the water pump on your 2017 Honda BF115 after 7 years. Rubber components in the pump can degrade over time, affecting performance. If it's working fine with good water flow, you could monitor it, but consider replacement as preventive maintenance. Writing a book report requires a lot of time and effort, which I was struggling to manage. That’s when I decided to use https://academized.com/write-my-book-report and their service was outstanding. The writer provided a well-researched and organized report that met all my requirements. The paper was delivered on time and exceeded my expectations. I’m extremely satisfied with their service and would recommend it to anyone needing academic assistance.
Click to expand...
Hi, I want to buy B75 Marine Outboard motor shop manual from your given website. Is it trustworthy?
 
The website is reliable. I have ordered from it and had no problems. They do however have a message up currently that they won't be filling orders over the holidays so be aware of that.

Good luck, Merry Christmas and have a Happy New Year!
 
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