Sea-Doo Long Block 903 ACE 420090336 | Original BRP Spark Engine Block

The Sea-Doo Long Block 903 ACE with part number 420090336 is an original BRP replacement engine block for selected Sea-Doo Spark models with 900 ACE and 900 HO ACE engines. The long block forms the basis of the engine and is supplied as a pre-assembled engine unit to enable professional engine overhaul or replacement of the existing engine.

As an original BRP spare part, the engine block ensures the highest fit, optimal performance, and maximum reliability in accordance with the manufacturer's specifications.

What is a long block?

A long block is a pre-assembled engine unit that typically includes the following main components:

• Engine block
• Crankshaft
• Connecting rod
• Piston
• Cylinder
• Cylinder head
• Valve train

Depending on the version, peripherals such as the intake, fuel system, alternator, starter, or exhaust components can be reused separately.

Original BRP quality

The original Sea-Doo long block offers:

• Original BRP spare part
• Factory fit
• Perfect tuning for the 903 ACE engine
• High operational safety
• Maximum service life
• Optimal performance delivery
• Reliability in marine conditions

Areas of application

Replacement of a long block may be required in the event of:

• Engine damage
• Piston or cylinder damage
• Crankshaft damage
• Hydro-lock
• Overheating damage
• High mileage
• Economical engine overhaul

Suitable for the following Sea-Doo models

Sea-Doo Spark 900 ACE

Sea-Doo Spark 900 HO ACE

Advantages of an original engine block

• BRP manufacturer quality
• Optimal power output
• High reliability
• Long service life
• Perfect compatibility with existing components
• Ideal for professional engine overhauls
• Factory quality control

Important compatibility note

Part number 420090336 was developed specifically for Sea-Doo vehicles with the Rotax 903 ACE engine. Before purchase, compatibility should be checked using the vehicle identification number (VIN) as well as the currently installed engine part number.

Installation should be carried out exclusively by qualified specialist personnel.

Product features

• Original Sea-Doo / BRP spare part
• Part number: 420090336
• Long Block 903 ACE
• Pre-assembled engine block
• For Sea-Doo Spark models
• Developed for Rotax 903 ACE engines
• High reliability and durability
• Original BRP quality

Scope of delivery

• 1 x original Sea-Doo Long Block 903 ACE
• BRP part number 420090336

Frequently Asked Questions (FAQ)

Is this an original BRP engine block?

Yes, part number 420090336 is an original BRP spare part.

For which engines is this long block suitable?

The engine block is intended for Sea-Doo models with the Rotax 903 ACE or 900 HO ACE engine.

What is included in the long block?

The long block includes the essential internal engine components such as the engine block, crankshaft assembly, and cylinder head. External peripherals are generally reused or ordered separately.

Can the engine block be installed by the user?

Replacing a long block requires extensive specialist knowledge as well as special tools and should be carried out by a qualified specialist workshop.

Does the long block fit every Sea-Doo Spark?

No. Compatibility should always be checked using the vehicle identification number (VIN) and the original part number.