Cummins/Onan — Cold-Weather Starting With Preheater
Operation · Glow plug preheater
From a Cummins/Onan operator's manual covering: KT-1150, KT-1150-C450, KT-1150-P450, KT-2300, KT-2300-C900, KT-2300-P900, KTA-1150, KTA-1150-C525, KTA-1150-C600, KTA-1150-P600, KTA-2300, KTA-2300-C1050…. Check it applies to your exact model before use.
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Before you start
- Do not use vapor in conjunction with preheater - could result in a fire.
- Do not use vapor compound type starting aids near heat, open flame or on engines equipped with glow plug system.
Procedure
- Set throttle in idle; turn glow plug toggle switch to 'ON' (red indicator light on).
- After 20 seconds, start cranking; operate preheater priming pump to maintain 80 to 100 psi fuel pressure.
- If engine does not start within 30 seconds, stop cranking and wait one or two minutes.
- After engine starts, pump primer slowly to keep engine idling smoothly; do not accelerate.
- When engine no longer falters between primer strokes, stop pumping, close and lock primer, turn off glow plug switch.
Tools required
- Preheater priming pump Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Fuel pressure 80 to 100 psi [552 to 689 kPa]
- Glow plug amperage 30 to 32 minimum
Source: Cummins/Onan operator'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.