Honda GX390 engine specs and maintenance
Small engine · Honda · used in 1 verified equipment variant · Last verified 2026-10-25
Scope: no stand-alone engine-maker spec document was used for this engine. Values come from Honda generator documents (brochure and owner's manuals) and apply to the machine named in each column (“as installed in”).
389 ccDisplacement
1.16 qtOil capacity
0.028-0.031 in.Spark plug gap
Specifications
| Make | Honda[brochure p.12] |
|---|---|
| Model | GX390[brochure p.12] |
| Displacement | 389 cc[brochure p.12] |
| Air filter type | dual element (foam + paper)[manual p.60] |
Maintenance specs
| Oil type | 10W-30[manual p.2] |
|---|---|
| Oil capacity | 1.16 qt[manual p.82] |
| Spark plug gap | 0.028-0.031 in.[manual p.2] |
Service parts
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| Spark plug type | BPR6ES (NGK)[manual p.82]Find this part: Amazon Sears PartsDirect |
|---|
Equipment using this engine
- Honda EU7000iS variant EU7000iS · Inverter generator
Manuals and sources
No documents on record.
Sources we could not obtain
- Honda engine owner's manual / spec sheet: Not fetched in this pilot; values are as published for the Honda generator(s) that use this engine.
Recalls
CPSC recalls for Honda GX390
CPSC recall check not yet verified. Search CPSC
We have not finished a CPSC check for this record, so we make no recall claim either way.
A listed recall usually covers only the serial, spec or model numbers in the CPSC notice; check your machine. Try the recall lookup.
Other Honda engines
Last verified against source documents: 2026-10-25.