Why replace the oil filter regularly?
The oil filter is an essential component of the Rotax ACE engine. It retains impurities, metallic particles, and combustion residues that circulate within the lubrication system. A clogged or worn filter can lead to insufficient lubrication, premature wear of internal parts, and, in severe cases, engine failure.
For Rotax ACE 903, ACE 1503, and ACE 1630 engines powering Sea-Doo Spark jet skis and WILLIAMS tenders (Turbojet, Sportjet, Minijet), replacing the oil filter is recommended at every oil change, which is every 50 hours of operation or once per season.
Required Equipment
- Rotax ACE compatible oil filter (ref. BRP 956744 or equivalent)
- Wrench with an E8 external torx socket
- Suction pump (manual or electric)
- Oil drain pan
- Clean rags
- 4T engine oil recommended by the manufacturer: BRP 5w40 synthetic
Oil filter replacement steps
1. Prepare the engine
Run the engine for 1 to 2 minutes to warm up the oil and facilitate draining. Then turn off the engine and let it cool for 5 to 10 minutes. Place a drain pan under the filter.
2. Drain the oil by suction
Using a suction pump (manual or electric), insert the tube into the oil dipstick tube down to the bottom of the crankcase. Extract all the used oil. This method is particularly suitable for Rotax ACE engines where access from underneath is limited. Empty the contents into an approved drain pan and dispose of the used oil at an authorized collection point.
3. Remove the old filter
Using an E8 external torx socket, unscrew the filter cover counterclockwise. (1 bolt for 1503 and 1630 engines / 3 bolts for ACE 903 engines). Be careful of residual oil that may leak out. Carefully clean the contact surface on the engine block.
4. Prepare the new filter
Lightly coat the O-ring of the new filter with clean engine oil. This ensures a proper seal and facilitates future removal.
5. Install the new filter
Insert the new filter by hand until it makes contact, then tighten by an additional quarter turn. Do not use a tool for final tightening to avoid damaging the seal.
6. Fill with new oil
Pour in the recommended amount of oil via the filler cap (located on top of the engine). Use XPS 5W40 synthetic BRP oil. Indicative capacities: ~2.84 L for the ACE 903 and ~4.5 L for the ACE 1503/1630 (oil + filter change). Check the level on the dipstick after filling.
7. Check for leaks
Start the engine and let it run for a few minutes. Check for any leaks around the filter. Check the oil level and adjust if necessary.
Which oil filter should you choose for your Rotax ACE?
To ensure the compatibility and performance of your engine, use exclusively a genuine BRP filter (ref. 956744) or a high-quality equivalent filter certified as compatible with Rotax ACE 903, 1503, and 1630 engines.
Low-quality filters may present risks of leaks or insufficient filtration, endangering the longevity of your engine.
Compatibility
This guide applies to the following models:
- Sea-Doo Spark (Rotax ACE 903 engine)
- WILLIAMS Turbojet (Rotax ACE 1503 / 1630 engine)
- WILLIAMS Sportjet (Rotax ACE 1503 / 1630 engine)
- WILLIAMS Minijet (Rotax ACE 903 engine)
Find our Rotax ACE compatible oil filters directly in our shop and ensure the longevity of your engine!
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