272144 Vanguard Twin Cylinder OHV BRIGGS & STRATTON.pdf

Fig. 43
Fig. 45
Oil Cooler
7. With equipment control lever in SLOW position
and engine running at governed idle RPM, use
Tang Bender #19352 (1), and bend throttle
restrictor tang (7) so that tang just contacts
governor lever (8), Fig. 44.
Some engines are equipped with an oil cooler,
Fig. 46. The oil cooler is mounted on the blower
housing. Filtered oil is routed through the oil cooler
through two oil lines from a special oil filter adapter.
Forced air from the flywheel fan flows through the oil
cooler fins dissipating heat from the engine oil.
The oil cooler fins should be cleaned every 100
hours, checked periodically for debris, and cleaned
with compressed air or a soft bristle brush.
Fig. 44
8. Refer to Service Engine Sales Microfiche,
MS-6225 or the Service Engine Sales Manual,
MS-4052, for Top No-Load RPM by engine
Model and Type Number.
9. Move control throttle lever to FAST position and
check engine RPM.
10. Bend tang (8) with Tool #19352 (1) to obtain desired
top no-load RPM, Fig. 45.
NOTE: Engine Model 303447 Type 0411-01 – Set
Top No-Load Speed to 2900 RPM 50
RPM.
Spark Plugs
Fig. 46
Replace spark plugs every 100 hours of operation or
every season, whichever occurs first. Replace spark
plugs if electrodes are burned away, or if the
porcelain is cracked.
NOTE: Do not blast-clean spark plugs. Spark plugs
should be cleaned by scraping or hand wire
brushing and washing in a commercial
solvent.
Use a wire gauge (1) to set spark plug gap, Fig. 47.
Torque spark plugs to 180 in. lbs. (20 Nm).
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