Firman WH03344 — Change Engine Oil
Maintenance
For the Firman WH03344, from the Firman manual.
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Before you start
- Used oil can cause skin cancer.
- Do not overfill.
Procedure
- Loosen cover screws and remove maintenance cover.
- Pop up rubber plug from below yellow draining bolt.
- Remove yellow drain bolt.
- Tilt generator on its side and allow oil to drain completely.
- Replace yellow drain bolt.
- Fill engine with oil until it reaches HIGH (H) level on filler cap.
Tools required
- Drain pan Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Oil capacity: 0.6 L
- Oil type: SAE 10W-30 Amazon eBay $54.99 API SJ
Source: Firman 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.