85mm DIY Waterjet Housing PackageA complete 3D-printable waterjet housing system for DIY electric surfboards, developed and field-tested over multiple builds. Includes housing, stator, and nozzle (60mm exit). My own impeller design is included as well, though a commercial impeller can be used as an alternative (see specs below).What's included:

Impeller housingStator (flow straightener)Nozzle (60mm exit)Impeller (optional, see note)(reference only, untested)

Recommended hardware:

Motor: [FLIPSKY 85165, 230~250KV, voltage range Battery: 14S (51.8V nominal), continuous discharge 150A+, peak 200-250A ]ESC: [FLIPSKY75350 ]Impeller: [MSQ 85mm] — custom or commercial compatibleBolts/hardware: Hardware needed:M5x15 (4), M5x60 (6), M6x20 (8), M3x10 (4) boltsM5 heat-set inserts (8), M3 heat-set inserts (4)⌀10mm round bar, 170-175mm (impeller shaft)DJC-30CRD mechanical seal (12mm motor side / 10mm impeller side)12x30x8mm Viton oil seal (inside aluminum tube)6800ZZ bearings (2)Aluminum tube OD24 x ID19, 30mm (stator sleeve)M3x10 flat-head screws (5)8mm outer diameter urethane hoseSilicone & epoxy adhesiveAssembly:

All parts are keyed and fit together in one orientation only — no guesswork needed.

Print settings:

Tested with PLA. 5-6 walls (perimeters) with 5-10% infill was sufficient for all parts, including the nozzle exit and motor mount — no issues at this setting even under load.For waterproofing, I applied a single-component urethane varnish to the exterior surfaces, in addition to silicone/epoxy at the marked groove areas (see assembly images).