Yep...dang near like my first 3 inch yellow pontooned Keene. Been running twin engined 5 inchers for many years and don't look back. That's a "jet nozzle" designed for shollower water and even out of stream bedrock pockets with the addition of water...re: that hundred feet of layflat blue hose. With a jet nozzle you can remove the nozzle end from water and move to another spot without having a big problem with your sluice like you get by removing a power nozzle/jet log system. I think in time you will know what I mean when you see it happening..HA! Your jet nozzle setup will work better in some ways and visa-versa for power nozzle setups. One "pushes" the flow/material thru many feet of hose the other sucks it . One picture is worth...so here:
https://www.google.com/search?q=jet...sAQIcw&biw=1280&bih=699#imgrc=q4fhyA3dDwVJlM:
You'll find out fast enough about blockages thru-out your system and will want a rubber mallet and a five or six foot 1/2 piece of plumbing pipe to dislodge those plug ups. (thats what the little hole is for at the riffle side of the crashbox, the hammer is for beating along the hose for plugs.) Anywhere you have a bend or reduced spot is a potential problem spot.
Guess I should let you make your final payment before telling you to start saving more money...HA! BUT when you get tired of kickin', cussin' and throwing that Briggs and Stratton, carberator malfunctioning, valve bending tempermental piece of backward engineered motor into the creek STEP UP to a 5.5 Honda/pump and really suck some dirt. By the way, I think you will find that pump has a plastic impeller inside it and probably impossible to locate a replacement. Now, on the more pleasant side of things...crash boxes are great pieces of a darn good working sluice box...perhaps better than my flare/3 stage sluice (modern

).
I've used a INNER TUBE 4inch dredge in our creek...not bad, not great but pontoons are very spendy so just to get you on the right track and with a little garage/tool/hardware time:
https://www.google.com/search?q=blu...=RTCxWKC3LIijjwTCyYTABg#imgrc=wgIGdGPZz4NpLM:
I used to be lucky and was able to test my dredge at the community swimming pool (good friends of the park manager). Saves alot of anguish when you find a missing part or bad fitting,etc. Now I'm even luckier...live year around on our 40 acres and watch the creek from my window...and even then I'll have to shut down and come back for a part now and then. It's a ***** when you have 30 or 100 miles to fetch something that only costs a couple of bucks. Set up your tool/spare parts box wisely. Duct tape and two-part epoxy are a MUST HAVE!!!! HA!
ALL in all you will have day after day of joy with your new friend and of course while waiting for the snow to melt I'm sure if you search this and other sites you will gain more tips than will fit in yur noggin.