Maintenance, Figure d.4 - set spark plug gap – Lincoln Electric POWER-ARC 4000 SVM103-A User Manual

Page 34

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

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

PART NO. 802592)

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

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).

POWER-ARC 4000

D-3

MAINTENANCE

TABLE D.1

ENGINE MAINTENANCE SCHEDULE

Maintenance

Every 5 Hours

25 Hours

50 Hours

100 Hours

Operation

or Daily

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.