Vanguard
TM
Twin-Cylinder OHV Liquid-Cooled Engine
Section 1 - General Information
Page 9
bore to wear quickly. As the rings and cylinder bore
become worn, these abrasive particles enter the
crankcase and contaminate the oil, forming an abrasive
mixture which will cause wear on all of the internal
moving parts.
Clean cartridge every 100 hours. To clean cartridge,
gently tap on end with handle of screwdriver. Replace
cartridge every 600 hours. Clean and replace more often
under dusty conditions. Replace if very dirty or any
damage occurs to cartridge.
NOTE: Do not use pressurized air or solvents to
clean cartridge. Pressurized air can damage
cartridge; solvents will dissolve cartridge.
1. Unlock clamps and remove cover .
2. Remove cartridge from air cleaner body.
3. Carefully clean out air cleaner cover.
4. Install cartridge in body.
5. Install cover and lock clamps with rubber valve
down.
Fig.5
REPLACE SPARK PLUG
Replace spark plugs every year. Replace spark plugs if
electrodes are burned away, or the porcelain is cracked.
Set spark plug gap at .020” (.51 mm). Torque spark
plugs to 180 in. lbs. (20.0 Nm).
NOTE: Do not blast clean spark plugs. Spark
plugs should be cleaned by scraping or hand
wire brushing and washing in a commercial
solvent.
Fig. 6
B&S to Champion*
Plug Type
B&S Champion*
Resistor Plug
491055 RC12YC
Resistor Plug
496018 RC14YC
Champion and the Bow Tie are trademarks of Federal-Mogul Ignition
Co. Used under license.
*
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