How to Change the Coolant in a 2015 Husqvarna FC350
Shop parts for a 2015 Husqvarna FC350 Dirt Bike.
Maintaining the cooling system of your 2015 Husqvarna FC350 is essential for peak performance, especially demanding motocross conditions. Routine coolant changes prevent overheating, corrosion, and long-term engine damage. This guide outlines the proprietary MotoSport method for changing coolant on your FC350, highlighting details unique to this model year.
What You Will Need
- Fresh high-performance coolant (recommended for off-road motorcycles)
- Socket set (M6 socket for water pump cover screw)
- Drain pan
- Funnel
- Protective gloves and eyewear
- Rags for clean-up
Step-by-Step Coolant Change
- Preparation:
- Ensure motorcycle is cool and positioned upright on a level surface. Hot coolant can cause serious burns.
- Clean the area around the radiator cap and water pump cover to prevent contamination.
- Remove the Radiator Cap:
- Slowly open the radiator cap to release any residual system pressure.
- The FC350 radiator is accessible from the left side, just above the radiator fins.
- Drain Old Coolant:
- Place a drain pan beneath the water pump cover.
- Remove the water pump drain screw (M6) using a socket wrench.
- Allow all old coolant to flow completely from both radiators. Tilting the bike side-to-side can help evacuate stubborn fluid.
- Flush (if desired for maintenance):
- Insert distilled water through the radiator fill neck, replace the drain screw, and run the engine briefly at idle to circulate. Allow to cool, then repeat the drain step until clear water exits.
- Refit Drain Screw:
- Install the drain screw with a new seal ring. Torque the screw to 10 Nm (7.4 lbf–ft) for a leak-free seal.
- Wipe away any spilled fluid before refilling.
- Fill with New Coolant:
- Using a funnel, slowly fill the radiator with fresh coolant until it reaches the base of the filler neck.
- Tilt the bike gently to dislodge trapped air bubbles. Top off as needed.
- Do not overfill—the FC350 system self-regulates via an expansion reservoir during engine cycles.
- Bleed Air From System:
- Start the engine and let it warm up to operating temperature. This may open the thermostat and circulate coolant through the entire system.
- After warming, turn off the bike and allow it to cool completely.
- Recheck the coolant level and top off if necessary, as air may have been displaced into the reservoir during the heat cycle.
- Repeat the check after your first ride post-change.
2015 Husqvarna FC350 Model Notes
- The 2015 FC350 shares its engine design closely with KTM models, but some fasteners and cooling system routing are Husqvarna-specific—always use parts specified for your make and model.
- Monitor for common issues such as leaking at the water pump seal or radiator connectors, especially after coolant changes. Replace o-rings and seals during routine service if any wear is noticed.
- Use only high-grade, motorcycle-specific coolant; incompatible coolants can harm magnesium engine cases or compromise cooling efficiency.
- If your FC350 is equipped with an aftermarket radiator fan, wiring can obstruct cap access—plan accordingly during disassembly and reassembly.
Final Steps
- Double-check for leaks and proper coolant levels before every ride.
- Dispose of old coolant responsibly at your local hazardous waste facility—do not pour down drains or into the environment.
Regular coolant maintenance not only shields your 2015 Husqvarna FC350 from engine damage but also keeps performance sharp throughout the riding season.
Related Shopping Categories
Shop Radiators for a 2015 Husqvarna FC350 Dirt Bike.
Shop Coolant for a 2015 Husqvarna FC350 Dirt Bike.
Shop Temperature Sensors for a 2015 Husqvarna FC350 Dirt Bike.
Shop Tools for a 2015 Husqvarna FC350 Dirt Bike.
Shop Radiator Hoses for a 2015 Husqvarna FC350 Dirt Bike.
Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.