SKI-DOO 420813035 Rotax Cylinder Head 337

( Brand: Ski-doo ), ( Manufacturer Part Number: 420813035 ), ( Part Type: Cylinder Head )

Review SKI DOO Rotax 337 Cylinder Head

The Ski-Doo 420813035 Rotax 337 Cylinder Head is a crucial component of the Rotax engine, known for its exceptional power and efficiency in snowmobiles. This cylinder head is meticulously engineered to deliver optimal performance in various riding conditions.

The Rotax 337 Cylinder Head boasts a compact design that enhances overall engine balance and reduces weight. It is constructed from high-strength aluminum alloy, ensuring robustness and durability. The cylinder head features a precise combustion chamber design that promotes efficient fuel burning and reduces emissions.

The intake and exhaust ports are strategically placed to optimize air and fuel flow, ensuring efficient combustion. The head gasket is a multi-layer steel design that provides superior sealing and prevents coolant leaks. The cylinder head also includes a coolant jacket that ensures efficient cooling, preventing overheating.

The Ski-Doo 420813035 Rotax 337 Cylinder Head is designed to work seamlessly with other components of the Rotax engine, such as the crankshaft, piston, and connecting rod. It is compatible with various Ski-Doo snowmobile models and is backed by BRP's industry-leading warranty for peace of mind.

In summary, the Ski-Doo 420813035 Rotax 337 Cylinder Head is a high-performance and durable component that plays a vital role in delivering powerful and efficient snowmobile experiences. Its compact design, robust construction, and optimized port placement make it an essential upgrade for any serious snowmobiling enthusiast.

Buying a Ski-Doo 420813035 Rotax 337 cylinder head involves considering several factors, including its advantages, disadvantages, and a conclusion based on these points.

1. Improved Performance: A new cylinder head can enhance the overall performance of the engine. It can lead to better fuel efficiency, increased horsepower, and improved throttle response.

2. Durability: A high-quality cylinder head can last for a long time, offering durability and reliability. It can help reduce the need for frequent repairs and maintenance.

3. Better Cooling: A new cylinder head can provide better cooling capabilities, preventing overheating and reducing the risk of engine damage.

1. Cost: Replacing a cylinder head can be an expensive proposition. The cost of the part itself, as well as the labor costs for installation, can add up quickly.

2. Time-Consuming: Installing a new cylinder head can be a time-consuming process. It may require the services of a professional mechanic, which can mean being without your Ski-Doo for several days.

3. Risk of Damage: During the installation process, there is a risk of damaging other components, such as the engine block or crankshaft. This can lead to additional repair costs.

The decision to buy a Ski-Doo 420813035 Rotax 337 cylinder head depends on various factors, including the current condition of your engine, your budget, and your personal preferences. If you are experiencing performance issues or have noticed signs of engine damage, replacing the cylinder head may be necessary. However, if your engine is running well and you are not experiencing any issues, it may be more cost-effective to hold off on the replacement. Ultimately, it is essential to weigh the advantages and disadvantages carefully and consider all the costs involved before making a decision.

If you have determined that replacing the cylinder head is the best course of action, it is recommended to purchase a high-quality, OEM (original equipment manufacturer) part to ensure optimal performance and durability. It is also a good idea to have the installation done by a professional mechanic to minimize the risk of damage to other components. However, if you are on a tight budget, you may consider exploring aftermarket options or doing the installation yourself. Just be sure to thoroughly research the options and potential risks before proceeding.

Details:

Fits 1972-74 Ski Doo with 337 single cylinder motor. These are getting hard to find. Has good threads in the plug hole. All used parts sold as is.

Please view all photos before buying.

part #: 420813035 prices

• $49.99-$175.00

specifications enginesnowmobile:

• for makes: Skidoo, Ski-doo
• brand: Ski-doo
• mpn: 420813035
• part type: Cylinder Head

returns enginesnowmobile:

• policy: No Returns

shipping enginesnowmobile:

• class: Standard
• carrier: USPS
• transit: 4-10 Days
• service: USPS Ground Advantage
• cost: $12.50
• type: Fixed

seller enginesnowmobile:

• # reviews: 87
• city: Wessington Springs, South Dakota
• rating: 100.0%

payments enginesnowmobile:

• credit card: Mastercard
• other
• wallet: Paypal

general enginesnowmobile:

• Snowmobile Parts > Engines Components > Snowmobile Engine Components
• condition: Used

offer enginesnowmobile:

• options: Ship-to-home
• sold: 0
• availability: In Stock
• started: June 22, 2025
• quantity: 1
• best offers: True

Ski-doo 420813035 Is Similar To:

• 420923595 420923595 Ski-doo 09 550 Fan (30% similar) ...(January 23rd, 2018)
• 504151767 Lid 0800371005 504151767 0800371005 Ski-doo Chaincase (22.9% similar) I am selling a Ski-doo chain case lid this part came off running sled that we parted out...(November 15th, 2017)
• 0000 Ski-doo 1995 95 Ski (40% similar) ...(April 3rd, 2017)
• 000000 Ski-doo Skidoo Snowmobile Xp (31.6% similar) ...(July 29th, 2017)
• 003sds600apgk Spi Winderosa 2003 Ski-doo (17.3% similar) Brand new top end rebuild kit. Features machined, smooth piston crowns for reduced carbon buildup, increased horsepower and fuel economy. Hard anodized crowns are 75 stronger than non-anodized, providing minimal expansion and reducing the chance of cold seizures when combined with Teflon molybdenum ...(August 6th, 2017)
• 008ssua600drtek Spi Winderosa 2008 Ski-doo (16.9% similar) Features machined, smooth piston crowns for reduced carbon buildup, increased horsepower and fuel economy. Pistons are for the standard bore 72MM. MOS2 Teflon molybdenum coated skirts perform at the highest standards, reducing friction and heat for added power longevity. Hard anodized crowns are 75 ...(October 9th, 2017)
• 01.5699.00 Pro X Ski-doo Piston (27.8% similar) A set of pistons for skidoo 600 twin. Make sure it fit your snowmobile before biding...(February 16th, 2018)
• 013sxrs6etek Spi Winderosa 2013 Ski-doo (17.5% similar) Hard anodized crowns are 75 stronger than non-anodized, providing minimal expansion and reducing the chance of cold seizures when combined with Teflon molybdenum coated skirts. Sip pistons feature the following: high-silicon content hyper eutectic cast aluminum material for less heat expansion, ...(February 17th, 2018)
• Magneto Flywheel Magnets 340 Ski 0212416034 Tnt Doo 1976 Wheel Fly Rotor Bosch (21.8% similar) Has been media blasted clean. We answer all questions. They may not be clean. 1 mile south of town on m 19. They may have some dents, scratches, cracks and or missing pieces. Our address is. Magnets have pull. They may need some repairs. West side of the road. They will not look like new parts. They...(February 19th, 2015)
• 0221500800 Ski-doo Coils 6 Nordic Olympique Rotax Elan Vintage 70 Engine Tnt (32.5% similar) These are sold as is. Will get parts as pictured. Check pictures to make sure you are OK with condition before buying. They do not look melted or anything so I think all or most should work. May fit others also. Used parts are normally dirty so expect them to have some grease, grime and or rust on ...(March 3rd, 2015)
• 023sdl600setek Spi 2002-2003 Ski-doo Legend (23.8% similar) MOS2 Teflon molybdenum coated skirts perform at the highest standards, reducing friction and heat for added power longevity. Pistons are for the standard bore 76MM. Includes 2 sip pistons, rings, wrist pins, cir clips, pin needle bearings, and a top end gasket kit. Features machined, smooth piston ...(February 12th, 2018)