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Description
Technical Specifications
- MFG. Part Number 529-000-064
Vehicle Information
Ski-Doo Blizzard 438 Snowmobile (1972)
The 1972 Ski-Doo Blizzard 438 was a standout snowmobile, celebrated for its advanced engine technology and racing-inspired design. As part of the Blizzard lineup, which included models like the 293, 340, 395, 440, 645, and 797, the 438 model featured a potent 438cc twin-cylinder, free-air engine. This engine was notable for being one of Ski-Doo's first production motors to incorporate rotary valves, designed for high performance with one carburetor and a tuned expansion chamber per cylinder. The 1972 model year marked a significant overhaul for the entire Ski-Doo Blizzard series, rather than minor mid-cycle updates. These comprehensive changes included a new 15-inch chassis, with the engine repositioned lower and further forward for improved handling – a first for Ski-Doo. The sleds sported a distinctive "Coffin style" two-piece hood. Further enhancements involved a redesigned, lighter rear suspension with a single-piece aluminum rail, a Kelsey-Hayes hydraulic disc brake system, and adjustable chrome-plated front ski shocks. The drivetrain also saw upgrades like an aluminum chain case and a steel cleated track. Q: How do I know if this part fits my 1972 Ski-Doo Blizzard 438?
A: To ensure perfect compatibility, please use the year and edition selector at the top of this page.
Maintenance
| Component | Interval | Details |
| Engine oil filter | Not applicable | Two-stroke engines do not use a conventional engine oil filter. Lubrication is achieved by mixing oil with gasoline. |
| Fuel/Oil Mixture | Every refueling | Use a 40:1 or 50:1 (gasoline/oil) mixture with high-quality, low-ash, full synthetic API-TC rated two-stroke oil. Mix thoroughly before adding to the tank. Check the manual or vehicle decals for the precise ratio. |
| Drive Belt | Check every 50 hours or every 2 500 to 5 000 km | Regularly inspect for wear, cracks, or glazing. Replace if any signs of deterioration are present or if performance decreases. |
| Spark Plug | Check every 25 to 50 hours or at the start of each season | Inspect and clean or replace as needed to ensure optimal performance and prevent fouling. The insulator tip color can indicate engine conditions. |
| Air Filter | Inspect annually or seasonally | Vintage snowmobiles may have a very basic air filter or screen. Clean or replace if dirty or damaged to ensure proper airflow. |
| Coolant | Not applicable | The engine is air-cooled and does not use liquid coolant. |