Spark Plug Service

Spark Plug Service

<Standard spark plug>

RECOMMENDED SPARK PLUG: ZFR6K-9E (NGK)

Incorrect spark plugs can cause engine damage.

See page 85 for instructions of handing the iridium spark plugs (optional parts).

1.Disconnect the battery negative (-) terminal.

2.Unlock and remove the engine cover (p.77).

SERVICING YOUR OUTBOARD MOTOR

6 × 20 mm FLANGE SH BOLT CONNECTOR

LOCK TAB

IGNITION COIL

PLUG MAINTENANCE COVER

3.Remove the 6 20 mm flange

SH bolt and remove the plug maintenance cover.

6 × 25 mm FLANGE BOLT

4.Remove the 6 25 mm flange bolt.

Disconnect the connector by pushing the lock tab and remove the ignition coil.

SERVICING YOUR OUTBOARD MOTOR

BOX WRENCH

New plug Plug needing replacement SIDE ELECTRODE

0.031 – 0.035 in (0.8 – 0.9 mm)

SPARK PLUG WRENCH

5.Remove the spark plug using the spark plug wrench, box wrench and the Phillips screwdriver (accessories). 6.Inspect the spark plugs. Replace them if the electrodes are worn, or if the insulators are cracked or chipped.

SEALING WASHER

INSULATOR

7.Measure the spark plug electrode gap with a wire-type feeler gauge.

Correct the gap, if necessary, by carefully bending the side electrode.

The gap should be: 0.031 – 0.035 in (0.8 – 0.9 mm)

8.Install the spark plugs carefully, by hand, to avoid cross-threading.

9.After each spark plug seats, tighten with the spark plug wrench to compress the sealing washer.

If reinstalling used spark plugs, tighten 1/8 - 1/4 turn after the spark plugs seat.

If installing new spark plugs, tighten 1/2 turn after the spark plugs seat.

Loose spark plugs can overheat and damage the engine. Overtightening the spark plugs can damage the threads in the cylinder head.

SERVICING YOUR OUTBOARD MOTOR

10.Install the ignition coil. Reinstall the 6 25 mm flange bolt.

11.Push the connector onto the ignition coil. Make sure it locks in place.

12.Repeat this procedure for the other three spark plugs.

13.Reinstall the covers.

<Optional Parts: Iridium Spark Plug>

RECOMMENDED SPARK PLUG: IZFR6K-11E (NGK)

Incorrect spark plugs can cause engine damage.

Installation and removal procedure of the iridium spark plugs are the same as the standard spark plugs. These spark plugs have an iridium coated center electrode. Be sure to observe the following when servicing iridium spark plugs. •Do not clean the spark plugs. If an electrode is contaminated with accumulated objects or dirt, replace the spark plug with a new one. •Use only a ‘‘wire-type feeler gauge’’ to check the spark plug gap if necessary. To prevent damaging the iridium coating of the center electrode, never use a ‘‘leaf-type feeler gauge.’’

The gap should be 0.039 – 0.051 inches (1.0 – 1.3 mm). •Do not adjust the spark plug gap. If the gap is out of specification, replace the spark plug with a new one.