2025 SD Jet Pump Disassembly Questions

[Julian]

So when I removed the pump a second time to apply sealant, I noticed scoring or poor machining on the transom plate. I initially thought it was from the impeller, but this is upstream from that. I assume this is “normal”?

Never noticed that before, but not sure that I would have...

 

[anmut]

My pump has light scoring, nothing that big though. I'd reassemble and test to see if you have any cavitation or speed issues.

 

[Madman]

My pump has light scoring, nothing that big though. I'd reassemble and test to see if you have any cavitation or speed issues.

I think it was machined (not very well) because the impellers are actually rearward of the marks. I bought an inspection scope and will stick it down through the clean out port the next time I go out.

 

[FSH 210 Sport]

It kinda looks to me like the stick / branch spun around in that area while it was attached to the impeller..

Go enjoy your boat!

 

[SoonersJet81]

Stumbled upon this thread and got to thinking - I pulled the starboard side pump to inspect the impeller and wear ring (which both looked fine). Didn't notice any sealant and didn't use any when reassembling. Boat performs great - am I good to run it the rest of the season with no sealant and then give everything a once over when I shut it down for the year? 2012 242 LS with 400ish hours.

 

[Madman]

Stumbled upon this thread and got to thinking - I pulled the starboard side pump to inspect the impeller and wear ring (which both looked fine). Didn't notice any sealant and didn't use any when reassembling. Boat performs great - am I good to run it the rest of the season with no sealant and then give everything a once over when I shut it down for the year? 2012 242 LS with 400ish hours.

That’s a common question. The videos you find online don’t mention it and many on this forum don’t use it either. One of the reasons for not replacing the sealant is that it makes it easier to remove the pump the next time. I waffled on it myself and then called my dealer. Their recommendation was to replace it, so that’s what I did. I probably would have done it anyway. If you decide to replace the sealant, I think you’ll be fine waiting until the season.

 

[Neutron]

They are sealed from the factory so i clean and reapply it

 

[SoonersJet81]

That’s a common question. The videos you find online don’t mention it and many on this forum don’t use it either. One of the reasons for not replacing the sealant is that it makes it easier to remove the pump the next time. I waffled on it myself and then called my dealer. Their recommended was to replace it, so that’s what I did. I probably would have done it anyway. If you decide to replace the sealant, I think you’ll be fine waiting until the season.

Thank you! I'll check the bolts to make sure they're still snug but if I don't note any performance issues I'm not going to mess with it. Boat hit 47mph last weekend with a crew of 6 so obviously it's doing well.

 

[FSH 210 Sport]

Stumbled upon this thread and got to thinking - I pulled the starboard side pump to inspect the impeller and wear ring (which both looked fine). Didn't notice any sealant and didn't use any when reassembling. Boat performs great - am I good to run it the rest of the season with no sealant and then give everything a once over when I shut it down for the year? 2012 242 LS with 400ish hours.

Did you buy the boat new or used?
Do you boat in fresh water or salt / brackish water?
Did you apply the loctite 572 low yield thread sealant to the bolts ?

 

[SoonersJet81]

Used fresh water and no

 

[FSH 210 Sport]

Used fresh water and no

Did you purchase New or used ?

I highly recommend getting some of that loctite product and put it on the bolt threads, you could pull one bolt at a time, put a very thin coat on the threads and reinstall. I boat in fresh water and recently did one year with no sealant on the bolts, swapped to a new set of impellers a couple weeks ago and the bolts were definitely starting to get crusty.

 

[SoonersJet81]

Did you purchase New or used ?

I highly recommend getting some of that loctite product and put it on the bolt threads, you could pull one bolt at a time, put a very thin coat on the threads and reinstall. I boat in fresh water and recently did one year with no sealant on the bolts, swapped to a new set of impellers a couple weeks ago and the bolts were definitely starting to get crusty.

I will do that! I will also mention that I mistakenly pulled one of the transom bolts and when I went to snug it back down I was fearful that it had been stripped out but I finally got it snug. I purchased the boat used it's a 2012 242 LS and I'm the third owner. It's always been in Texas and appears to have been well taken care of. 400 hrs roughly.

 

[FSH 210 Sport]

Okay great!

I think the reason your pump didn’t have sealant is because a previous owner didn’t replace the sealant.