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Craftsman 917.377542

Gas Walk Behind Mower — service parts and specifications. Also written 917377542.

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.

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Reference data — no warranty, no fitment guarantee, used at your own risk. Disclaimer

Spark plug
RJ19LM · J19LM p.11
Spark plug gap
.030 p.11, 13
Engine oil
SAE 30 (above) · SAE 5W-30 (above) · 5W-30 (above) p.11
Belt
137052 p.22

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.

What these parts do

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.

Belt — Belts are consumables. Length and width must match exactly — a belt that is half an inch off will throw or burn.

All values found, with sources

ItemValueContextPage
Spark plugRJ19LMBOVE 32°1=) SAE 5W-30 (BELOW 32°F) OIL CAPACITY: 20 OZS. SPARK PLUG (GAP: .030") CHAMPION RJ19LM OR J19LM VALVE CLEARANCE: INTAKE: .004 - ,008 …11
Spark plugJ19LM… SAE 5W-30 (BELOW 32°F) OIL CAPACITY: 20 OZS. SPARK PLUG (GAP: .030") CHAMPION RJ19LM OR J19LM VALVE CLEARANCE: INTAKE: .004 - ,008 EXHAUST: .004 - …11
Spark plug gap.030IL TYPE (API-SF/SG/SH): SAE 30 (ABOVE 32°1=) SAE 5W-30 (BELOW 32°F) OIL CAPACITY: 20 OZS. SPARK PLUG (GAP: .030") CHAMPION RJ19LM OR J19LM VALVE …11
Engine oilSAE 30… CU. IN. GASOLINE CAPACITY/TYPE: 1.6 QUARTS UNLEADED REGULAR OIL TYPE (API-SF/SG/SH): SAE 30 (ABOVE 32°1=) SAE 5W-30 (BELOW 32°F) OIL CAPACITY: 20 …11
Engine oilSAE 5W-30CAPACITY/TYPE: 1.6 QUARTS UNLEADED REGULAR OIL TYPE (API-SF/SG/SH): SAE 30 (ABOVE 32°1=) SAE 5W-30 (BELOW 32°F) OIL CAPACITY: 20 OZS. SPARK PLUG …11
Engine oil5W-30ACITY/TYPE: 1.6 QUARTS UNLEADED REGULAR OIL TYPE (API-SF/SG/SH): SAE 30 (ABOVE 32°1=) SAE 5W-30 (BELOW 32°F) OIL CAPACITY: 20 OZS. SPARK PLUG (GAP …11
Belt137052… 143603 _a_nntrol Head Kit knut #10-24 28 154990 Head Machine Screw 1/4 x 2.12 31 13201032 137052 V-Belt 33 48386 Spring Retainer 35 151521 Hubcap …22

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