OrphanSpecStraight answers for orphaned outdoor equipment

Craftsman 143.016502

Lawn Garden Engine — service parts and specifications. Also written 143016502.

Spark plug
RJ19LM · RJ19LM4 p.5
Engine oil
SAE 30 (above) · SAE 5W30 (below) · SAE 10W (below) p.2

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.

Engine oil — Grade depends on operating temperature, not on the machine. Several grades listed below are all correct — pick by season.

All values found, with sources

ItemValueContextPage
Spark plugRJ19LM… electrodes are pitted, burned or porce- lain is cracked. For replacement use Champion RJ19LM, or equivalent. NOTE: A resistor spark plug must be …5
Spark plugRJ19LM4… 151 ) Intake Valve (Std.) (Incl. 151) Screw, 5/16-18 x 1-1/2" Resistor Spark Plug (RJ19LM4) Valve Spring Valve Spring Cap Intake Valve Seal Valve …9
Engine oilSAE 30… container is marked: A. P. I. service "SF" - "SJ". FOR SUMMER (ABOVE 32°F; 0°C) USE SAE 30 OIL. Using multigrade oil will increase oil consumption …2
Engine oilSAE 5W30OIL. Using multigrade oil will increase oil consumption. FOR WINTER (BELOW 32°F; O°C) USE SAE 5W30 OIL. (SAE 10W is an acceptable substitute.) DO NOT …2
Engine oilSAE 10W… oil will increase oil consumption. FOR WINTER (BELOW 32°F; O°C) USE SAE 5W30 OIL. (SAE 10W is an acceptable substitute.) DO NOT USE 10W40 OIL. OIL …2

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