WSM Performance 003720K Complete 4-Tec Jet Pump Assembly: Seadoo

The WSM Performance 003-720K Complete 4-Tec Jet Pump Assembly is an aftermarket replacement pump assembly for compatible Sea-Doo 155.5 mm jet pump systems. It is designed to restore pump housing integrity, shaft support, bearing condition, sealing, and wear ring performance without requiring a full internal pump rebuild. This assembly is supplied as a pre-assembled pump unit but does not include the impeller, so the original impeller must be reused if serviceable or replaced separately.

Key Features

• WSM part number: 003-720K
• Product type: Complete PWC jet pump assembly
• Pump diameter: 155.58 mm / 6.125″
• Application: Compatible Sea-Doo 4-Tec jet pump systems
• Assembly style: Pre-assembled replacement pump unit
• Included components: Pump housing, hardened impeller shaft, bearings, oil seals, O-rings, wear ring, and pump cone
• Wear ring: Pre-installed
• Important exclusion: Impeller / propeller not included
• Service purpose: Restores thrust, pump efficiency, sealing, and shaft/bearing support
• Replacement type: Aftermarket drop-in pump assembly where fitment is confirmed

Product Compatibility

This pump assembly is intended for compatible Sea-Doo 4-Tec models using the matching 155.5 mm jet pump configuration, including application references such as:

• GTI Series: GTI 130, GTI SE 130, GTI SE 155, GTI Rental, including 20062008 references where specified
• GTX Series: GTX 4-Tec Standard, Wake, Supercharged, and Limited, including 20032007 references where specified
• GTX 155: 20082009 references where specified
• RXP Series: RXP 155, including 20072008 references where specified
• GTS Series: 20112012 references where specified
• Sea-Doo Jet Boats: Sportster 4-Tec, Speedster Twin 200, Challenger 230 SE, Utopia 205, and Islandia SE references where specified

Fitment must be confirmed by Sea-Doo model, year, engine package, pump size, pump housing style, impeller shaft configuration, and parts diagram.

Fitment Notice

This assembly is for compatible 155.58 mm / 6.125″ Sea-Doo 4-Tec jet pump systems. Do not select it by horsepower or model family alone. Sea-Doo pump components can vary by year, hull, engine output, driveshaft arrangement, pump support, and impeller setup.

This kit does not include the impeller. Inspect the existing impeller before reuse. If it is bent, chipped, worn, cavitation-damaged, corroded, or poorly matched to the engine, replace it separately during pump installation.

When This Part Needs Replacement

Replace the jet pump assembly if the pump housing is damaged, the wear ring is heavily worn, the bearings are noisy or rough, the shaft has play, the seals leak, or the pump cone shows water intrusion or oil contamination. It may also be needed when the PWC has poor acceleration, cavitation, reduced top speed, vibration, abnormal pump noise, or visible damage after debris ingestion.

A complete assembly is often the better repair when multiple pump components are worn at the same time, or when rebuilding the existing pump would require housing, bearing, seal, shaft, and wear-ring replacement.

Installation Notes

Remove the old pump assembly and inspect the driveshaft, carbon seal, PTO boot, impeller, pump support, intake grate, ride plate, nozzle, reverse gate, and steering linkage before installation. Transfer or install the correct impeller using the proper tools and service procedure.

Confirm impeller-to-wear-ring clearance, shaft alignment, seal condition, and pump cone assembly before running the unit. After installation, test for smooth rotation, correct steering and reverse operation, no leaks, and normal thrust under load. Follow the Sea-Doo service manual for torque values, sealant requirements, alignment checks, and final water test.

Alternate/Superseded Part Numbers

• WSM Performance: 003-720K
• Common description: Complete 4-Tec Jet Pump Assembly
• Pump size reference: 155.58 mm / 6.125″
• Application reference: Sea-Doo 4-Tec 130 HP / 155 HP and selected related 155.5 mm pump applications where specified

Parts Desk Insight

The key check on this assembly is the pump size and exact Sea-Doo application. A complete pump can save time compared with rebuilding a damaged unit, but the impeller still needs to be inspected and matched separately. If the old pump failed from debris or cavitation, check the impeller and wear-ring clearance before assuming the new assembly alone will solve the performance issue.