Operator's Manual

ManualsBrandsToro ManualsRiding EquipmentToro 74237

tool/feeler g aug e to c hec k and adjust the air g ap .

Install a new spark plug(s) if necessar y .

• T ype: NGK

BPR4ES or equi v alent

• Air Gap: 0.030 inc h (0.75 mm)

Removing the Spark Plug

1. Diseng ag e the PTO , mo v e the motion control

lev ers to the neutral loc k ed position and set

the parking brak e .

2. Stop the engine , remo v e the k ey , and w ait for

all mo ving par ts to stop before lea ving the

operating position.

3. Pull the wire(s) off the spark plug(s) ( Figure 33 ).

No w clean around the spark plug(s) to prev ent

dir t from falling into the engine and potentially

causing damag e .

4. R emo v e the spark plug(s) and metal w asher .

Figure 33

1. Spark plug wire 2. Spark plug

Checking the Spark Plug

1. Look at the center of the spark plug(s)

( Figure 34 ). If y ou see light bro wn or g ra y on

the insulator , the engine is operating properly .

A blac k coating on the insulator usually means

the air cleaner is dir ty .

Important: Nev er clean the spar k

plug(s). Al w ays r eplace the spar k plug(s)

when it has: a black coating , w or n

electr odes, an oil y ﬁlm, or cracks.

Figure 34

1. Canter electrode insulator

3. Air gap (not to scale)

2. Side electrode

2. Chec k the g ap betw een the center and side

electrodes ( Figure 34 ). Bend the side electrode

( Figure 34 ) if the g ap is not cor rect.

Installing the Spark Plug

1. Install the spark plug(s). Mak e sure the air g ap

is set cor rectly .

2. Tighten the spark plug(s) to 16 ft.-lb (22 N ⋅ m).

3. Push the wire(s) onto the spark plug(s)

( Figure 33 ).

Fuel System

Maintenance

Replacing the Fuel Filter

R e place the fuel ﬁlter after ev er y 200 operating

hours or yearly , whic hev er occurs ﬁrst.

Nev er install a dir ty ﬁlter if it is remo v ed from the

fuel line .