John Deere Gasoline Trimmer/Cutter 450G

Warning: This maintenance check requires trained personnel with PPE!

Describe the condition of the gear case lubricant

Multipurpose grease addition if necessary

NOTE: Do not completely fill gear case. Leave room for expansion because grease expands when

Sign off on the Crawler Dozer Maintenance

Disconnect spark plug cable (A) and remove spark plug (B)

Scrape or wire brush carbon deposits from spark plug

Set spark plug gap to 0.6-0.7 mm (0.024-0.028 in.)

Connect spark plug cable (A) to spark plug (B)

Ground spark plug against bare engine metal

When grounded against bare metal, the plug should produce a hot, blue spark (C) while the recoil starter rope is being pulled

If replacement is needed, use spark plug

Turn low speed screw (A) clockwise until lightly seated, then back screw out one turn

Turn high speed screw (B) clockwise until lightly seated, then back out 1-1/4 turns

Start engine and warm it up for 2-3 minutes

Turn idle speed screw (C) clockwise until cutting head begins to turn, then back screw out 1/2 turn

Adjust low speed screw (A) to obtain maximum consistent idle and smooth acceleration

Adjust high speed screw (B) until you hear a very slight four-cycling sound at full throttle under no load