È

É

IGNITION SYSTEM ELEC – +

SPARK GAP TEST

1.Disconnect the ignition coil from spark plug.

2.Remove the ignition coil cap.

3.Connect the dynamic spark tester 1 (igni- tion checker 2) as shown.

Ignition coil 3

Spark plug 4

ÈFor USA and CDN

ÉExcept for USA and CDN

4.Kick the kickstarter crank.

5.Check the ignition spark gap.

6.Start engine, and increase spark gap until misfire occurs. (for USA and CDN only)

Minimum spark gap: 6.0 mm (0.24 in)

COUPLERS, LEADS AND IGNITION COIL CONNECTION INSPECTION

1.Check:

Couplers and leads connection Rust/dust/looseness/short-circuit

Repair or replace.

Ignition coil and spark plug as they are fit- ted

Push in the ignition coil until it closely contacts the spark plug hole in the cylin- der head cover.

ENGINE STOP SWITCH INSPECTION

1.Inspect:

• Engine stop switch conduct

Tester (+) lead Black lead 1

Tester (–) lead Black lead 2

 

 

 

 

 

 

B

 

B

Tester selector

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

position

 

 

 

 

 

 

 

 

 

PUSH IN

 

 

 

 

Ω ⋅ 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FREE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No continuity while being pushed Replace. Continuity while being freed Replace.

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Yamaha WR250FM Ignition System Elec +, Spark GAP Test, COUPLERS, Leads and Ignition Coil Connection Inspection