Pump question

[MEDOO]

I'm looking to get a spare jet pump. Are they interchangable from left to right sides?

 

[Coastiejoe]

I'm looking to get a spare jet pump. Are they interchangable from left to right sides?

Unless someone has made a change, yes, they are the same left to right...

 

[MEDOO]

Thanks I thought so, just making sure.
I'm also thinking about going to Solas impellers, what kind of topend speed gain would I expect? Its running 7000rpm at about 50mph now. Will it still pull a tube ok with those?

 

[Coastiejoe]

Thanks I thought so, just making sure.
I'm also thinking about going to Solas impellers, what kind of topend speed gain would I expect? Its running 7000rpm at about 50mph now. Will it still pull a tube ok with those?

Generally speaking,,, you will ose something on one end if you gain something on another end. That said, if you do not change the impeller size you will normally gain over-all performance and still keep your pulling power and sometimes gain 2 MPH or so.

So,,, if you are changing NOTHING else, stick with the same size as Seadoo does a very good job in regards to the math behind pulling load compared to top end speed.

I have yet to instal mine yet and have had it for two seasons,, LOL

Having twins and upgrading to a Solas prop I would think you would notice an impressive performance difference.

 

[MEDOO]

I'm looking for more topend and cruising speed. Its real snappy out of the hole, I figured I would sacrifice some lowend to gain some topend. I cruise around 95% of the time. Starting my homework now. Need to figure out what I have in there first and go from there.
But I still want a spare pump.

 

[Guest_User]

also take into consideration the waters you ride in. If the waters are mostly smooth to very light chop, OEM, solas, and skat will perform pretty much the same down low. The difference is how the hull design/pumps load when turning at throttle right or left... The Challenger has been know to cavitate with the OEM impellers.

If you ride is chop to rougher waters then Skat would be the choice.

as of right now I`m have the OEM in the boat, when I did a quick driveshaft repair a few months ago, but had been running the Solas 15\23 since the rehab started. There is def a difference in the way the boat comes up on plane and mid range acceleration. I also could swear the OEM`s are 1-3 mph slower than the 15\23 solas...

Now Skat 17\22 is also recommended for our boats. Keep in mind that no impeller is made the same and different pitch numbers from differe manufactures react/respond differently... The skats hub design/compression/thrust is very much different from the solas...

you would really have to know what your looking for and do back to back testing when trying different brands and pitches...

There was a set of 17\22`s that came with our boat when we bought it. I did not hang on to them and sold them off... I`m considering trying them again, now that I have the boat under control. The PO had a huge cavitation issue and those impellers simply didn`t help. It was a mechanical/engine alignment issue all along... so if your boat is mechanically sound, know this before you demand a bit more from your boat, bc any of the aftermarket impeller will load the engines a little more, and that`s also dependent upon pitch selected...

Racerxxx can testify to the Solas 15\23`s, they are a good overall impeller...

Sakt is also more pricey than solas, bc of the way they are made, the skat is a much sturdier impeller, and has the ability to cut thru weeds/eel grass as opposed to the solas where the weeds just wrap around the impeller and the OEM`s are far worse...

so do your homework, this isn`t a cheap mod by any means... Good luck!

 

[MEDOO]

Thanks Pale Rider, good info. I plan to do some gps testing and some hole shot testing first and get some baseline numbers. I'm not even sure what I have in there. I assume they are stock, but not sure..

 

[Guest_User]

Thanks Pale Rider, good info. I plan to do some gps testing and some hole shot testing first and get some baseline numbers. I'm not even sure what I have in there. I assume they are stock, but not sure..

It`s never a good idea to mash the throttles on these old boats, so just be careful when trying to launch full blast... everything is old, and even when parts have been replaced the weak link will let go, not a matter of if, a matter of when...

if everything isn`t perfect, like blade edge, wear ring clearances, pump condition, etc etc you will not get an accurate measurement. but close...

even steering nozzle mis-alignment will scrub speed...

you really can`t expect to gain a lot with these boats. Most people go the other direction and are more concerned with bottom end pull for skiers and tubing. Like mentioned before you`ll sacrifice some bottom end for more speed, maybe a tick more is all that`s expected.

The bottom line is the aftermarket impellers are way more efficient at processing water than the OEM regardless of who made them. BRP`s spec aren`t to bad considering the multi use platform and the compromise associated with it...

We also cruise a lot, anywhere between 4700-6200... so top end gain really doesn`t matter unless your goal is to constantly race the boat...

and then again with older boats, I`m sure there is water in the inner layers of the hull and that equates to more weight compared to when new...

there is more of a "feel" and seat o the pant gain in jet ski`s compared to boats when using a different brand/pitch impeller. lighter, more responsive and less wetted hull is a major dramatic difference. IMHO lots of folks get this cornfused coming from ski`s VS boats...

One guy nailed it with that twin 951 screamer somewhere here on the forum... More speed equates to a lot more useable horsepower/torque and following up with a tuned impeller...