CAUTION: Some tachometers may not be compatible with ignition system. Consult tachometer manufacturer before connecting tachometer to system. DO NOT allow tachometer terminal to become grounded or damage to ignitor and/or coil may exist.

Ensure engine is at normal operating temperature. Connect timing light to engine. Connect tachometer to "IG-" terminal of engine check connector.
Install jumper wire between terminals "TE1" and "E1"of engine check connector. See Fig 1. Ensure idle speed is within specification. See IDLE SPEED SPECIFICATIONS TABLE in this article. Note that base timing is within specification. See IGNITION TIMING TABLE. Adjust timing by turning distributor.

Fig 1: Installing ES250 Timing Jumper Wire
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Remove jumper wire from engine check connector and check that advance timing is within specification. See IGNITION TIMING TABLE.

IGNITION TIMING

Application	Specification
Base Timing	10 @ 650-750
Advance Timing	13-27 @ 650-750

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Ignition Timing

Use the Manual With the Right Hardware

When to See a Mechanic

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