Gas Walk Behind Mower — service parts and specifications. Also written 91737752A.
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 | J19LM | F) SAE 5W-30 (BELOW 32°F) OIL CAPACITY: 20 OZS. SPARK PLUG (GAP: .030") CHAMPION RJ19LM OR J19LM VALVE CLEARANCE: INTAKE: 005" EXHAUST: .007" SOLID … | 11 |
| Spark plug | RJ19LM | … 32°F) SAE 5W-30 (BELOW 32°F) OIL CAPACITY: 20 OZS. SPARK PLUG (GAP: .030") CHAMPION RJ19LM OR J19LM VALVE CLEARANCE: INTAKE: 005" EXHAUST: .007" … | 11 |
| Spark plug gap | .030 | OIL TYPE (API-SF/SGiSH): SAE 30 (ABOVE 32°F) SAE 5W-30 (BELOW 32°F) OIL CAPACITY: 20 OZS. SPARK PLUG (GAP: .030") CHAMPION RJ19LM OR J19LM VALVE … | 11 |
| Engine oil | SAE 30 | … CUr IN_ GASOLINE CAPACITY/'TYPE: ! ,6 QUARTS UNLEADED REGULAR OIL TYPE (API-SF/SGiSH): SAE 30 (ABOVE 32°F) SAE 5W-30 (BELOW 32°F) OIL CAPACITY: 20 … | 11 |
| Engine oil | SAE 5W-30 | CAPACITY/'TYPE: ! ,6 QUARTS UNLEADED REGULAR OIL TYPE (API-SF/SGiSH): SAE 30 (ABOVE 32°F) SAE 5W-30 (BELOW 32°F) OIL CAPACITY: 20 OZS. SPARK PLUG … | 11 |
| Engine oil | 5W-30 | CITY/'TYPE: ! ,6 QUARTS UNLEADED REGULAR OIL TYPE (API-SF/SGiSH): SAE 30 (ABOVE 32°F) SAE 5W-30 (BELOW 32°F) OIL CAPACITY: 20 OZS. SPARK PLUG (GAP … | 11 |
| Air filter | 491588 | … Assembly 281145 Cover. Linkage 28t I36 Guard, Finger 397974 Cap. Fuel Tank 496116 Base, Air Cleaner 491588 Filler. Air 281340 Cover. Air Cleaner … | 45 |