Generac — Optional Lower Radiator Hose Heater Use and Maintenance
Operation
From a Generac owner's manual covering: MLT5150, MLT5200, MLT5200ICAN. Check it applies to your exact model before use.
Applies to: Generac MLT, Mitsubishi S4L2-W461ML engine, Isuzu 4LE1NYGV-03 / 4LE1NYGV-03E engine, Isuzu D1105-E3BG engine
Before you start
- Improper use of the lower radiator hose heater could result in serious personal injury.
Procedure
- Verify that the cooling system is full of a proper mixture of water and engine coolant before each heater use.
- Heater is designed for all-night operation; 2-5 hours of heating just prior to starting is usually sufficient.
- Unit must be parked in a level position to maintain proper orientation of the heater while the heater is in operation.
- Use only an undamaged extension cord, outdoors rated, three-prong grounded 120VAC cord with a minimum amperage rating of 10A, connected to a properly grounded 120VAC GFCI outlet.
- Before starting the engine, unplug the extension cord from power first, then unplug the heater cordset from the extension cord.
Tools required
- Outdoors rated, three-prong grounded 120VAC extension cord, minimum 10A
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 120VAC FridayParts $62.99 GFCI outlet required
- 2-5 hours of heating usually sufficient
Full service-parts list: Generac MLT →, Mitsubishi S4L2-W461ML engine →, Isuzu 4LE1NYGV-03 / 4LE1NYGV-03E engine →
Source: Generac owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.