Yamaha 150A Service Manual - Page 45

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INSP

ADJ

CONTROL SYSTEM

3052

3053

2. Adjust:

• Ignition timing (full advance)

Adjustment steps

(1) Remove all of the spark plugs.

(2) Remove the intake silencer.

(3) Install the dial gauge 1 into cylinder

#1's spark plug hole.

(4) Slowly turn the flywheel magnet

assembly clockwise and stop it when

the piston is at TDC.

(5) Set the dial gauge to "0".

(6) Turn the flywheel magnet assembly

clockwise until the dial gauge indicates

the proper specification.

NOTE:

Turn the flywheel magnet assembly clock-

wise to locate BTDC.

Piston position

150A, L150A, 175A/

C150TR:

200A, L200A: 2.05 mm (0.08 in)

150F, L150F, D150H, 175D,

S175D/D150TR,

S175TR:

S150F, LS150F, 175F, 200G/

S150TR, L150TR, P175TR,

P200TR:

150G, 200F, L200F/P150TR,

200TR:

S200F, LS200F, 225D/S200TR,

L200TR:

(7) Align the timing plate 2 with the spec-

ified mark on the flywheel magnet

assembly.

Timing plate position

150A, L150A, 175A/

C150TR:

200A, L200A:

150F, L150F, D150H,

175D, S175D/

D150TR, S175TR:

S150F, LS150F, 175F,

200G/S150TR, L150TR,

P175TR, P200TR:

150G, 200F, L200F/

P150TR, 200TR:

S200F, LS200F, 225D/

S200TR, L200TR:

3-4

2.28 mm (0.09 in)

3.05 mm (0.12 in)

3.33 mm (0.13 in)

2.53 mm (0.10 in)

2.78 mm (0.11 in)

BTDC 19˚

BTDC 18˚

BTDC 22˚

BTDC 23˚

BTDC 20˚

BTDC 21˚