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MAINTENANCE

3-8

SPARK PLUG REPLACEMENT

Remove the spark plug cap, and then remove the spark

plug (1) using a spark plug wrench (2).

Verify the new spark plug gap is correct (page 3-7).

Install a new spark plug finger-tight to seat the washer,

and then tighten 1/2 turn with a spark plug wrench.

A loose spark plug can become very hot and can

damage the engine. Overtightening can damage the

threads in the cylinder block.

Install the spark plug cap securely.

SPARK ARRESTER CLEANING

SOLID PROTECTOR TYPE

Remove the muffler cover (page 12-6), If equipped.

Remove the 5 x 8 mm tapping screws (1), 6 x 10 mm

tapping screw (2), and muffler protector (3).

Remove the 5 x 8 mm tapping screws (4) and spark

arrester (5).

If the engine has been running, the engine will be

very hot.Allow it to cool before proceeding.

SPARK PLUG: BPR6ES (NGK)W20EPR-U(DENSO)

(1)

(2)

The engine and the muffler becomes very hot dur-

ing operation and remains hot for a while after stop-

ping the engine. Be careful not to touch the muffler

while it is hot. Allow it to cool before proceeding.

(4)

(2)

(1)

(5)

(3)

62Z5F000.book 8 ページ２０１０年３月２３日　火曜日　午後３時３１分

Honda GX390UT2 Shop Manual

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