Comet Clutch Spring
03-207877 (MFG #: 207877A)
$27.99
Sale price
$27.99
Regular price
$27.99
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All springs with a tension of over 100 pounds when compressed to 2 3/8in. are for racing applications and are sold without a guarantee of long life.
Comet Clutch Spring for Ski-Doo Stratos 503 Snowmobile
Comet Clutch Spring for Ski-Doo Stratos 503 Snowmobile
$27.99
Sale price
$27.99
Regular price
$27.99
SKU:03-207877
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Description
Technical Specifications
- MFG. Part Number 207877A
Vehicle Information
Ski-Doo Stratos 503 Snowmobile (1986-1988)
The Ski-Doo Stratos 503, produced from 1986 to 1988, was a popular single-driver snowmobile known for its reliable performance. It was consistently powered by the robust Rotax 503 fan-cooled twin-cylinder engine, featuring a displacement of 496.7 cm³ (often rounded to 497cc) and delivering approximately 37 kW (50 hp) at 6800 rpm. Throughout its production, the Stratos 503 was primarily offered as a single model, without distinct sub-trims, maintaining its core identity. While there was no mid-cycle generation change, Ski-Doo introduced continuous improvements. The 1987 model year saw the integration of the innovative Positive Steering Suspension (PSS) front struts for enhanced steering and ride comfort, alongside a new rounded styling and an impact-resistant Metton hood. It also featured the Stratos rear slide suspension. For 1988, the Stratos continued with its proven engine, adding a wider 16.5-inch track, the advanced TRA (Total Range Adjustable) clutch, and a "Heat Flow" cab designed for improved rider comfort on longer excursions. These updates aimed to refine the riding experience without altering the fundamental platform. FAQ:
Q: How do I ensure this product fits my Ski-Doo Stratos 503?
A: To guarantee compatibility, please use the year and model selector at the top of this page. This will filter products specifically designed for your snowmobile's exact specifications. Q: Are there different versions of the Stratos 503 for 1986-1988?
A: While the Stratos 503 maintained a single primary model, specific features and components were updated annually. Always refer to the year selector for precise fitment.
Maintenance
| Component | Interval | Details |
| Oil Filter | Not applicable (2-stroke engine) | The Rotax 503 is a 2-stroke engine that mixes oil directly with fuel, so it does not use a traditional engine oil filter. Chaincase oil should be changed at the end of the season. |
| Drive Belt | Inspect before every ride; replace if worn | Inspect the belt for signs of wear (cracking, fraying). It is recommended to start each season with a fresh belt. Lifespan can vary from 2,400 to 4,800 km, but performance issues may indicate an earlier replacement is needed. |
| Spark Plug | Inspect or replace annually or every 50 hours | The 1987 model uses BR9ES spark plugs with a gap of 0.4 mm. Inspect or replace if experiencing misfires, rough idling, or loss of power. |
| Air Filter | Periodic inspection; clean/replace as needed | Inspect periodically for dirt buildup. Clean or replace if light cannot be seen through the filter. Dusty conditions require more frequent maintenance. |
| Coolant | Check before and during season; flush every 2 to 5 years | Check levels before and during the season. A flush is recommended every 2 years or every 4-5 years, as coolant can become corrosive. |
The maintenance intervals above are based on general practices and may not be 100% accurate for your specific model. It is highly recommended to consult the official owner's or service manual for your Ski-Doo Stratos 503 for the most precise information.