Lincoln Electric SVM103-A service manual Figure D.4 SET Spark Plug GAP

D-3

MAINTENANCE

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CLEAN OR REPLACE SPARK PLUG: Clean or replace the spark plug after every 100 hours of opera- tion or every season, whichever comes first. Do not blast the spark plug clean with an abrasive cleaning device. Clean the plug by scraping it or by using a wire brush. Wash the plug with a commercial solvent. After cleaning or when installing a new spark plug, set the terminal gap to .030 inch (.76 mm) with a feeler gauge. See Figure D.4.

FIGURE D.4 - SET SPARK PLUG GAP

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CLEAN SPARK ARRESTER SCREEN: If the muffler has the optional spark arrester assembly, remove it every 50 hours or once a year, whichever comes first, and inspect it. Clean the arrester. Replace it if you find any damage.

REMOVE COMBUSTION DEPOSITS: After every 100 to 300 hours of operation, remove the engine cylinder head. Scrape and wire brush the combustion deposits from the cylinder, cylinder head, top of the piston, and around the valves. Refit the gasket (replace it if damaged) and reassemble the cylinder head and block. Turn down the screws finger tight with the three long screws around the exhaust valve (if so equipped). Torque the screws in a staggered sequence to 165 inch-pounds (19 N·m).

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1.SPARK PLUG (STANDARD, PART NO. 492167; RESISTOR, PART NO. 802592)

2.FEELER GAUGE (.030 INCH, 76mm)

TABLE D.1

ENGINE MAINTENANCE SCHEDULE

Maintenance	Every 5 Hours	25 Hours	50 Hours	100 Hours
Operation	or Daily	or Yearly	or Yearly	or Yearly	100-300 Hours
Check Oil Level	●
Change Oil ◆			● Note 1
Clean Rotating Screen, Finger	●
Guard, or Debris Screen	Note 2
Service Foam Pre-Cleaner or		●
or Oil Foam® Element		Note 2
Service Air Cleaner Cartridge		●
(if no pre-cleaner)		Note 2
Service Air Cleaner Cartridge				●
(if pre-cleaner present)				Note 2
Clean Cooling System				●
Inspect Spark Arrester (Option)			●
Clean or Replace Spark Plug				●
Replace In-Line Fuel Filter (Option)				●
Remove Combustion Deposits					●

◆Change oil after first 5 hours, then after every 50 hours or once a year.

Note 1: Change oil every 25 hours when operating under heavy load in high ambient temperatures.

Note 2: Clean more often under dusty conditions or when airborne debris is present.

POWER-ARC 4000