Troubleshooting For Nitro Engines

 

Problem:    Engine Won't Start
Airflow is restricted
Fuel doesn't reach the carburetor
Engine and/or fuel system has an air leak
Fuel mixture needles not properly set
Glow plug fails to function
 
Problem:    Engine Starts, then dies
Idle is set too low
Low-speed needle is set to rich
Low-speed needle is set to lean
Clutch is binding
Glow plug is loose
Glow plug is fouled
Piston and sleeve are worn
Damaged bearings in the clutch bell
 
Problem:    Engine bogs when given full throttle
Low-speed needle is set to rich
Clutch engages too quickly
Glow plug is too cold
 
Problem:    Engine doesn't idle correctly
Engine might have air leak
Low-speed needle is set to lean
 
Problem:    Engine bogs or dies at high speed
High-speed needle is set to lean
Fuel flow is restricted
Piston and sleeve are worn
 
 
Solution
Clean air filter
Clean fuel filter
Inspect fuel tank, line and engine for poor seals
Return needles to factory-recommended settings
Replace glow plug and/or change glow plug filter
 
Solution
Adjust idle-speed screw clockwise
Lean out low-speed mixture
Richen low-speed needle
Take clutch apart and fix the problem
Tighten glow plug
Replace glow plug
Seal engine with high temp sealer
Clean or replace bearings
 
Solution   
Lean out low-speed mixture
Replace clutch spring/shoes
Install a hotter plug
 
Solution   
Seal engine with silicone
Richen low-speed needle
 
Solution   
Richen high-speed mixture
Clean fuel filter
Replace piston and sleeve