Tohatsu MFS 25 — инструкция по проверке зазора клапанов для двигателей 5-20 Power Unit [136/319]

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5-20

Power Unit

25/30 2006

3) Inspection of Valve Clearance

1. Remove upper starter lock cable, and then recoil starter and

belt cover.

2. Disconnect breather hoses 1 (2).

3. Remove fuel pump 2.

4. Disconnect cooling water (fuel cooler) hoses (2).

5. Disconnect spark plug caps and ignition coils, and remove

spark plugs and cylinder head cover 3.

No.1 piston is to be at top dead center of

compression stroke.

7. Check and adjust No. 1 cylinder's intake and exhaust valve

clearances. Adjust gap if it is out of specified range.

● I (a) II (d)

III (c)

Markb

5 cam shaft pulley

Valve Clearance (when engine is cold)

(IN) Intake valve d : 0.15±0.02 mm ( 0.006±0.001 in )

(EX) Exhaust valve e : 0.20±0.02 mm ( 0.008±0.001 in )

8. Rotate flywheel 4 clockwise to bring "III " mark c of cam

shaft pulley 5 to " " mark b of cylinder head.

9. Check and adjust No. 3 cylinder's intake and exhaust valve

clearances. Adjust gap if it is out of specified range.

10. In a similar way, bring "II " mark d of cam shaft pulley 5 to

"" mark b and check and adjust No. 2 cylinder.

When removing or installing cylinder head

cover, use 10mm ring wrench with large offset

angle.

6. Rotate flywheel 4 clockwise to bring " " mark a of cam

shaft pulley 5 to " " mark b of cylinder head.

MFS25_30_ch05.qxd 06.3.9 4:48 PM ページ 20