Toro 74199 - Cleaning the Cooling System; Spark Plug

31
Servicing the Primary Filter
Check and/or replace it after 200 operating hours.
If the primary filter is dirty, bent, or damaged then replace
the filter.
Do not clean the primary filter.
Servicing the Safety Filter
Replace it after 600 operating hours.
Important Never attempt to clean the safety filter. If
the safety filter is dirty, then the primary filter is damaged
and you should replace both filters.
Installing the Filters
Important To prevent engine damage, always operate
the engine with both air filters and cover installed.
1. If installing new filters, check each filter for shipping
damage. Do not use a damaged filter.
2. If the safety filter is being replaced, carefully slide it
into the filter body (Fig. 37).
3. Carefully slide the primary filter over the safety filter
(Fig. 37). Ensure that it is fully seated by pushing on
the outer rim of the filter while installing it.
Important Do not press on the soft inside area of the
filter.
4. Install the air cleaner cover with the side indicated as
UP facing up and secure the latches (Fig. 37).
Cleaning the Cooling System
Clean the air intake screen before each use. Remove any
buildup of grass, dirt, or other debris from the engine air
intake.
Spark Plug
Check the spark plug(s) after every 200 operating hours.
Make sure that the air gap between the center and side
electrodes is correct before installing the spark plug. Use a
spark plug wrench for removing and installing the spark
plug(s) and a gapping tool/feeler gauge to check and
adjust the air gap. Install a new spark plug(s) if necessary.
Type: Champion RC12YC (or equivalent)
Air Gap: 0.030 in. (0.76 mm)
Removing the Spark Plug(s)
1. Disengage the PTO, set the parking brake, stop the
engine, and remove the key.
2. Pull the wire(s) off the spark plug(s) (Fig. 38). Clean
around the spark plug(s) to prevent dirt from falling
into the engine and potentially causing damage.
3. Remove the spark plug(s) and metal washer.
m–5141
1
2
Figure 38
1. Spark plug wire 2. Spark plug
Checking the Spark Plug
1. Look at the center of the spark plug(s) (Fig. 39). If you
see light brown or gray on the insulator, the engine is
operating properly. A black coating on the insulator
usually means the air cleaner is dirty.
0.030 in.
(0.76 mm)
2
3
1
m–3215
Figure 39
1. Center electrode insulator
2. Side electrode
3. Air gap (not to scale)
Important Never clean the spark plug(s). Always
replace the spark plug(s) when it has a black coating,
worn electrodes, an oily film, or cracks.