Specifications

1LOCKED FOR PRINTING – SELECT SECT. NEEDED >
23
Fig. 47
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All Except Models 540000, 610000
Resistor spark plugs recommended by Briggs &
Stratton:
• B&S #491055 (Champion RC12YC) or
• B&S #496018 (Champion RC14YC)
Gap to 0.030” (0.76 mm).
Models 540000, 610000
Resistor spark plug recommended by Briggs &
Stratton:
• B&S #692051
Gap to 0.020” (0.51 mm).
Speed Control Wire Adjustment
NOTE: Manual friction and remote control
adjustment procedure is identical.
1. Loosen control casing clamp screw (1) at
governor control bracket, Fig. 48.
2. Move speed control lever to FAST position (in-
set, Fig. 48).
3. Move control casing and wire until governor
control swivel is at end of travel.
4. Tighten casing clamp screw.
Fig. 48
FAST
SLOW
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Valve Clearance Adjustment
1. Set No. 1 cylinder at 1/4” (6 mm) past TDC,
compression stroke.
2. Use a feeler gauge (1) to measure the valve
clearance. Valve clearance should be 0.005”
(0.13 mm) for the intake and exhaust valve.
NOTE: Measure valve clearance with the engine
COLD.
3. If the valve clearance requires adjustment,
loosen the lock nut (2) with a wrench (4). Use a
hex wrench (5) to turn the adjusting screw (3) to
adjust the valves, Fig. 49.
4. With the valve clearance correctly adjusted,
hold the adjusting screw. Torque the lock nut to
70 in. lbs. (8 Nm).
5. Repeat for No. 2 cylinder.
Fig. 49
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For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com