Gas Walk Behind Mower — service parts and specifications. Also written 917389580.
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.
Note: some values below appear more than once in the manual without a clear label. This usually means the model changed across production years. Check your serial number plate before ordering.
Spark plug — Replace annually or every 100 operating hours. Cross-reference equivalents from other brands usually fit.
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 | RN4C | AE 5W-30 (BELOW 32°F) DIL CAPACITY: 20 OZS. SPARK PLUG (GAP: .030") CHAMPION RESISTOR TYPE RN4C BLADE BOLT TORQUE: 35-40 FT. LBS. , The model and … | 11 |
| Spark plug | RJ19LM4 | S/B Order from Screw, 5/16-18 x 1-1/2= 71-999 Resistor Spark Plug RPM High 2900 to 3200 (RJ19LM4) Valve Spdng NOTE: This engine could have been built … | 21 |
| Spark plug gap | .030 | R DILTYPE (API-SF - SJ): SAE 30 (ABOVE 32°F) SAE 5W-30 (BELOW 32°F) DIL CAPACITY: 20 OZS. SPARK PLUG (GAP: .030") CHAMPION RESISTOR TYPE RN4C BLADE … | 11 |
| Engine oil | SAE 30 | TE OF PURCHASE 3ASOLINE CAPACITY/TYPE: 1.5 QUARTS UNLEADED REGULAR DILTYPE (API-SF - SJ): SAE 30 (ABOVE 32°F) SAE 5W-30 (BELOW 32°F) DIL CAPACITY: 20 … | 11 |
| Engine oil | SAE 5W-30 | INE CAPACITY/TYPE: 1.5 QUARTS UNLEADED REGULAR DILTYPE (API-SF - SJ): SAE 30 (ABOVE 32°F) SAE 5W-30 (BELOW 32°F) DIL CAPACITY: 20 OZS. SPARK PLUG … | 11 |
| Engine oil | 5W-30 | CAPACITY/TYPE: 1.5 QUARTS UNLEADED REGULAR DILTYPE (API-SF - SJ): SAE 30 (ABOVE 32°F) SAE 5W-30 (BELOW 32°F) DIL CAPACITY: 20 OZS. SPARK PLUG (GAP … | 11 |
| Air filter | 36919 | … Screw, 10-32 x 49/64" (Inc L 43) 239 34338 * Air Cleaner Gasket Ring Set (Std.) 241 36919 Air Cleaner Collar Piston Pin Retaining Ring 245 36905 … | 21 |
| Air filter | 36905 | Cleaner Gasket Ring Set (Std.) 241 36919 Air Cleaner Collar Piston Pin Retaining Ring 245 36905 Air Cleaner Filter Connecting Rod Ass'y. (_nc L 250 … | 21 |