Firman WT05571 — Change Engine Oil
Maintenance
For the Firman WT05571, from the Firman owner's manual.
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Before you start
- Avoid prolonged skin contact with used motor oil
Procedure
- Loosen cover screws and remove maintenance cover
- Pop up 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 oil filler cap, do not overfill
Specs & values
- Change every 100 hours (25 hours for new engine)
Source: Firman 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.