Generator Maintenance Checklist for Bali — By Running Hours

Weekly — Five Minutes, No Tools

• Run it for 20–30 minutes under load — not idle. Idle running glazes cylinders and builds carbon (wet stacking). Switch real load onto it, or skip the run and do a proper monthly loaded run instead.
• Look underneath for fresh oil, coolant or fuel drips on the pad.
• Check the battery terminals for white-green corrosion bloom — Bali humidity grows it fast.
• Glance at the controller display for stored fault codes or a battery-voltage warning.
• Check fuel level — a standby genset with a quarter tank is a promise it cannot keep.

Every 250 Hours or 6 Months — The Core Service

Whichever comes first — and in Bali the calendar usually wins. Even an engine that barely ran needs this at six months, because oil oxidises, fuel degrades and rubber hardens regardless of the hour meter:

• Engine oil and oil filter — full change with the grade your engine specifies.
• Fuel filter replacement and water separator drain. Bali's biggest killer: water and microbial growth in diesel. If the drained fuel looks like weak tea, the tank needs attention.
• Air filter inspection — replace if dark. Dusty dry-season sites halve its life.
• Coolant level and condition, hoses and clamps, belt tension and cracking.
• Battery: voltage, electrolyte (if serviceable), terminal cleaning and protection.
• All power and control terminals re-torqued — vibration loosens them gradually.
• A 30-minute loaded test run with voltage, frequency and temperature logged.

This is exactly the scope of our standard service visit, parts included.

Every 500 Hours

• Valve clearance check and adjustment (engine-dependent — some specify 1,000 hours).
• Radiator external cleaning — Bali's dust and garden debris block fins surprisingly fast, and a half-blocked radiator only reveals itself under sustained load.
• Charging alternator output check; crankcase breather inspection.

Every 1,000–2,000 Hours

• Coolant full replacement (old coolant turns corrosive inside the block).
• Injector inspection or service — earlier if you see black smoke or rough running, both common consequences of local fuel quality.
• Fuel tank internal inspection and cleaning — sludge and algae settle on the bottom and get stirred into filters the day a blackout makes the genset work hard.
• AVR output stability and alternator bearing check.
• A load bank test to verify the machine still holds its full rating — the only honest measure of a standby genset's health.

The Bali-Specific Extras

Coastal corrosion. Within ~500 m of the ocean, add a twice-yearly corrosion inspection: canopy steel, terminal lugs, AVR board. Cheap to catch early, expensive to discover during a blackout.

Fuel biocide. If your genset runs rarely, treat the tank — microbial growth in warm, damp diesel is near-guaranteed otherwise.

The logbook. Write every check and service down, with hours. It keeps warranties valid, makes faults diagnosable, and adds real value if you ever sell the property with the machine.

Or Let the Schedule Run Itself

Our service contracts do all of the above on calendar autopilot — visits booked by us, parts on the van, photo report after every service, priority callout if anything fails between visits. Guide prices on the pricing page.