G420E/G424E Tier LP Engine Maintenance Schedule 36
Maintenance Schedule Continued
Interval Hours
CHECK POINT
Daily
Every
250hrs or
a month
Every
500hrs or
3 months
Every
1000
Hours or
6 months
Every
1500
Hours or
9 months
Every
2600
Hours or
15 months
Every
4500
Hours or
2 years
Carburetor Section
Check air filter indicator X
Check for air leaks in the filter
system
X
Inspect air/fuel valve mixer
assembly
X
Inspect air/fuel mixer assembly
throat
X
Check for vacuum leaks in the
intake system including manifold
adapter and mixer to throttle
adapter
X
Inspect throttle assembly X
Inspect air filter X
Replace air filter element X
Check TMAP sensor for tightness
and leaks
X
Exhaust & Emission Section
Inspect engine for exhaust leaks X
Replace Oxygen Sensor X
Replace PCV Valve and breather
element
X