Gas Walk Behind Mower — service parts and specifications. Also written 917388091.
Read this before you order anything. These figures are transcribed automatically from manufacturer manuals and can be wrong. Nothing here is a fitment guarantee or professional advice.
Provided free, as is, with no warranty and no liability accepted — you use it at your own risk and on your own responsibility. Check every number against the plate on your own machine before you buy or fit a part.
Reference data — no warranty, no fitment guarantee, used at your own risk. Disclaimer
Transcribed from the manufacturer manual — not a fitment guarantee. Manufacturers supersede part numbers during a production run: check these against the plate on your own machine before ordering.
Spark plug gap — Set with a feeler gauge before installing. A wrong gap causes hard starting and rough running.
Engine oil — Grade depends on operating temperature, not on the machine. Several grades listed below are all correct — pick by season.
Air filter — Check every 25 hours, more often in dusty conditions. A clogged filter shows up as black smoke and power loss.
| Item | Value | Context | Page |
|---|---|---|---|
| Spark plug gap | .030 | Oil Type (API SG-SL): SAE 30 (above 32°F); SAE 5W-30 (below 32°F) Oil Capacity: 20 Ounces Spark Plug (Gap: .030") Champion RJ 19LM or J 19LM Blade … | 4 |
| Engine oil | SAE 30 | … Purchase: Gasoline Capacity / Type: 1.6 Quarts (Unleaded Regular) Oil Type (API SG-SL): SAE 30 (above 32°F); SAE 5W-30 (below 32°F) Oil Capacity … | 4 |
| Engine oil | SAE 5W-30 | Capacity / Type: 1.6 Quarts (Unleaded Regular) Oil Type (API SG-SL): SAE 30 (above 32°F); SAE 5W-30 (below 32°F) Oil Capacity: 20 Ounces Spark Plug … | 4 |
| Engine oil | 5W-30 | … / Type: 1.6 Quarts (Unleaded Regular) Oil Type (API SG-SL): SAE 30 (above 32°F); SAE 5W-30 (below 32°F) Oil Capacity: 20 Ounces Spark Plug (Gap … | 4 |
| Air filter | 791766 | O Valve-Needle/Seat O:1: Gasket-Float Bowl Bracket-Air Cleaner Primer 272653s. O:1: Gasket-Air Cleaner 791766 Line-Fuel (Cut to Required Length) … | 40 |
| Air filter | 690380 | … 741 790345 745 691648 842 691031 • 847 692047 851 493880s 868 697338 869 691155 870 690380 Filter-Air Cleaner Cartridge Cup-Flywheel Plate-Pawl … | 41 |