fits model: 377, Safari, Scout. make: Skidoo, Ski-doo. year: 1988–1991.

( Brand: Ski-doo ), ( Manufacturer Part Number: 6912980 ), ( Part Type: Crank Case )
The Ski-Doo Safari Scout 377, model number 6912980, is a snowmobiling legend from the year 1988. This particular model is identified as an 89 Series, making it a cherished collectible for many avid snowmobilers and enthusiasts. The 377 denotes the engine size in cubic inches, adding to its impressive specifications.
The crankcase of the Safari Scout 377 is a critical component of the engine. The crankcase design ensures efficient and reliable operation. It houses the crankshaft responsible for converting the reciprocating motion of the pistons into rotational power that ultimately propels the snowmobile forward. The cast aluminum construction offers durability and resistance to harsh sledding conditions.
The crankshaft itself is a work of engineering design. It is forged from high-strength steel and features a precision-ground surface to ensure a snug fit within the crankcase. The crankshaft's journal bearings are made from high-quality materials, ensuring minimal friction and prolonged service life.
The crankshaft also includes a counterweight that equates to a more balanced engine, making it easier to manipulate and control crucial when navigating varying terrain as you ride. The counterweight's position and design contribute to reduced engine vibrations, leading to a smoother, more comfortable riding experience.
The crankshaft's connecting rods link the pistons to the crankshaft. These rods are carefully designed and manufactured to transfer the power from the pistons to the crankshaft efficiently. They are made of high-strength materials and have reinforced ends to withstand the repetitive and intense forces that occur during operation.
The Safari Scout 377's crankcase includes the crankshaft position sensor, which is an important diagnostic tool. The sensor monitors crankshaft position and sends this information to the Electronic Control Module (ECM). This data is used to manage ignition timing and engine performance. A faulty crankshaft sensor can lead to a multitude of issues, including performance concerns and potential engine damage, highlighting its importance.
Lastly, the crankcase design also includes an oil pump, facilitating consistent lubrication of the engine. Efficient and accurate lubrication is vital for the longevity and overall performance of the engine. Overall, the safari Scout 377's crankcase and its associated components are crucial elements that ensure the engine runs smoothly and efficiently.
a) Vintage Snowmobile: Collectors and enthusiasts may find value and satisfaction in owning a vintage Ski-Doo Safari Scout 377 model.
b) Replacement Part Availability: You can find replacement crankcase components for this model, ensuring that necessary repairs can be carried out.
c) Rugged Build: The design and construction of the 1988-1991 Ski-Doo Safari Scout 377 model are resilient, allowing it to withstand heavy use.
d) Flexible Use: The Safari Scout 377 model offers an expandable rear cargo sled which enables users to carry more gear, making it suitable for touring and expedition applications.
2. Cons:a) Higher Cost: Compared to modern snowmobiles, a vintage Ski-Doo like the Safari Scout 377 can be costly, especially if it is in good condition or requires extensive repairs.
b) Limited Advanced Features: This older model lacks the advanced features and technological advancements found in new snowmobiles.
c) Less Fuel-Efficient: Older snowmobiles, including the Safari Scout 377, consume more fuel and consequently have higher operating costs than newer models.
d) Challenging Maintenance: Maintaining a vintage Ski-Doo might be more labor-intensive due to the lack of available specialized tools and equipment.
Conclusion:Before deciding to buy a Ski-Doo 6912980 89 1988-1991 Safari Scout 377 with crankcase crank lower and upper, you should carefully consider these pros and cons. If you're an enthusiast who enjoys collecting and restoring vintage snowmobiles or primarily plan to use it for recreational purposes, then this could be an excellent investment. However, if you require a more efficient and advanced model for extensive use, a newer snowmobile would be recommended.
Overall, the decision to buy this vintage Ski-Doo Should be based on an evaluation of your personal needs, budget, and intended usage alongside the pros and cons listed above.
Please know what your buying and make sure it is for model of machine. Crankcase removed from a Skidoo Safari in good condition.