Feeling the Heat
I’m having trouble with my nitro truck running hot. Do I need to adjust the carburetor or use a fuel with less nitro?
If your engine makes good power and seems to run fine other than running hot (as in consistently more than 300°F), then chances are its state of tune isn’t the real issue. But let’s check off the list: Richen the mixture by turning the high-end needle counterclockwise an eighth of a turn at a time to see if engine temps go down without hurting performance. Solved? Great. If not, other issues to check are airflow and drivetrain binding. Make sure there’s a big hole in your truck’s windshield to allow air to flow over the engine’s heat-sink head. Cutting out the area behind the engine helps, too, by allowing engine-heated air to escape. With the engine off and throttle at neutral, give your truck a shove to confirm it coasts freely. If it doesn’t, figure out where the resistance is coming from and fix it. Common culprits are dragging brakes and grass or other junk wrapped around the axles and/or driveshafts.
Nitro vehicles need plenty of cooling air. Don’t skimp on the ventilation holes.
Make sure the brakes aren’t dragging when the throttle is open.