John Deere 318 - Manual (Page 272)

A
ENGINE WILL NOT START OR STARTS HARD
• Test spark plugs: GO TO ‘
• Test fuel filter: GO TO Ú
• Adjust choke cable: GO TO Å
• Adjust throttle cable: GO TO Æ
• Adjust idle mixture screw: GO TO Ö
• Test fuel transfer pump: GO TO Ü
• Check for sheared flywheel key—P218G (316 and 318) and P220G (420): See Engine CTM2.
• Adjust timing—B43E (316), B43G (318) and B48G (420): GO TO 1!
• Check ignition system: See Section 240.
• Test compression pressure: GO TO 1@
• Test crankcase vacuum: GO TO 1Ô
• Inspect crankcase breather: See Engine CTM2.
• Check and adjust valve clearance: See Engine CTM2.
B
ENGINE BACKFIRES
• Adjust idle mixture screw: GO TO Ö
• Check for sheared flywheel key—P218G (316 and 318) and P220G (420): See Engine CTM2.
• Adjust timing—B43E (B43E), B43G (318) and B48G (420): GO TO 1!
• Check ignition system: See Section 240.
• Check for sticking valves: See Engine CTM2.
• Check and adjust valve clearance: See Engine CTM2.
MX,159022010,3 -19-05MAY95
MX,159022010,4 -19-27APR95
Diagnosis, Tests and Adjustments/Troubleshooting Guide
TM1590 (17MAY95)
220-10-2
316, 318 & 420 Lawn and Garden Tractors
020895
220
10
2