Table 4-7. Unit Preventive Maintenance Checks and Services - CONT.
Q - Quarterly
S - Semiannually
A - Annually
Item to Be
a. Install tool and operate tool holder to ensure it holds tools
properly (para 2-8c).
b. Operate check mode selector to ensure it stays in the selected
mode position (para 2-8d).
c. Install tool and try to rotate tool shaft CCW (as viewed from tool
end). If it can be moved easily, report it to DS maintenance.
Check starter rope for fraying by operating starter (para 2-9) and
a. Check throttle button for proper operation. The engine should
stop when the throttle button is pushed completely in.
b. Check fuel knob to be sure it will shut off fuel. Disconnect fuel
line at tank. Place catch basin under valve and operate valve top
ensure it is operating. Reconnect.
Check spark plug for fouling and proper gap (0.027-0.039 in.
[0.7-1.0 mm]). Clean if necessary or replace.
a. Check magneto nuts and screws for 10 lb-ft (14 Nm) tightness.
Tighten as necessary (para 4-20).
b. Check magneto for cracks, chips, or missing fins.
c. Check magneto housing for security.
a. Check for cracked or missing handle grips.
b. Check for cracked or missing handle bushings.