Sea-Doo Marine Engine Parts

(1 products)

This page focuses on Sea-Doo marine engines and helps you find compatible replacement parts and service information. Below you’ll find maintenance tips, commonly replaced items, and troubleshooting guidance. You can also browse our main parts collections. Scroll to the bottom to start browsing parts, and on the collection page use the “Filter & Sort” controls to narrow by year range and part category.

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How to Identify Your Sea-Doo Model

Nameplate/serial information is typically found inside the engine compartment or on the upper deck under the seat; the hull ID (HIN) is stamped on the starboard transom.
Model codes (e.g., SP, XP, GTI, GSX, GTX, LRV, Challenger) and suffixes indicate features like fuel system type (carb, RFI, DI) and trim levels.
Engine family identifiers include Rotax 587, 657/657X, 717/720, 787, and 947/951; DI and RFI variants are electronically managed.
Two-stroke Sea-Doo engines use oil injection (or premix after certain repairs). Jet propulsion parts are distinct from outboard gearcases.

Engine Platform Overview

Rotax 2-Stroke Twins (587 / 657 / 717 / 787 / 947)

Feature	Description
Configuration	Carbureted 2-stroke twin-cylinder engines; some RFI (787) and DI (947/951) electronic fuel systems.
Common Models	SP, SPI, XP, SPX, HX, GTI, GSI, GS/GSX, GTX, LRV, and select jet boats like Challenger variants.
Advantages	Light weight, simple architecture, strong hole-shot and mid-range response.
Notes	Most are oil-injected; verify jet pump size and wear ring spec when ordering propulsion parts. Post-rebuild premix procedures may apply.

Routine Maintenance & Service Parts

Intervals below are general guidelines for typical recreational use. Always follow your specific Sea-Doo service manual and adjust for operating conditions.

Item	Interval*	Remarks	Parts Link
Spark plugs	Inspect every 25–50 hrs; replace annually	Check gap and color; carry spares for 2-stroke use.	Spark plug
Fuel filter / strainer	50–100 hrs or annually	Replace or clean to prevent lean conditions and hesitation.	Fuel Filters
Oil injection lines and filter	Inspect each season; renew every 2 years	Check for soft or brittle lines; bleed system after service.	Hoses
Jet pump impeller & wear ring	Inspect each season and after debris strikes	Excessive clearance causes cavitation and poor acceleration.	Impellers
Pump bearings & seals	Inspect when noise or endplay noted	Service with seals to prevent water intrusion.	Bearings
Shaft oil seals (PTO/driveshaft)	Inspect during pump service or if water in hull	Replace worn seals to avoid leaks and corrosion.	Oil Seals
Anodes (ride plate/pump)	Inspect every 25–50 hrs; replace when 50% consumed	Critical for salt/brackish water to protect aluminum components.	Anodes
Cooling lines & tell‑tale fitting	Check after each ride; replace as needed	Look for kinks or salt scale; flush after salt use.	Hoses

Frequently Used Parts Categories

Routine Service — Service & Maintenance Kits
Fuel System — Fuel Filters
Ignition / Electrical — Electrical Items
Cooling System — Hoses
Jet Pump & Propulsion — Impellers
Seals & Gaskets — Gaskets
Corrosion Protection — Anodes

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale stream / overheat alarm	Inspect intake grate for debris, flush lines, verify hose routing and fittings	cooling hoses, temp sensor, gasket/seals
Poor acceleration / cavitation	Check impeller edges and wear ring clearance; look for air leaks at pump	impeller, wear ring, seals, bearings
Hard starting / rough idle	Confirm fresh fuel, clean fuel filter, correct plug heat range and gap	spark plugs, fuel filter, hoses
Excessive smoke	Verify oil injection setting, look for leaking check valves or pooling oil	oil lines/hoses, gaskets, spark plugs
Pump noise / vibration	Spin pump by hand for roughness; check driveshaft splines and alignment	bearings, oil seals, impeller

FAQs

Are parts interchangeable between different Sea-Doo engine families?

Some items cross over, but many are engine-family or pump-size specific. For example, 587/657 components differ from 787/947 parts, and DI/RFI hardware can be unique. Always match your model, year, and pump size before ordering.

When should the impeller or wear ring be replaced?

Replace when blades are nicked/bent or when clearance exceeds spec causing cavitation and poor thrust. Often a new wear ring restores performance; heavily damaged impellers should be replaced or reconditioned.

How often should the jet pump be serviced?

Inspect at least annually or after any strike/sand ingestion. Check bearing condition, seals, and endplay. Service intervals may be shorter for frequent shallow-water operation.

What information helps confirm part compatibility?

Provide the model name (e.g., XP, GTI), year, engine family (587/657/717/787/947), hull ID (HIN), and clear photos of the nameplate and the part you’re replacing.

Ready to find what you need? Browse our main collections by category to locate service parts that fit your Sea-Doo powertrain.

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If you’re unsure about your model, send us a photo of the nameplate and the part you need and we’ll help verify compatibility.