honda-automobiles gsv190 User Manual

Recommended Spark Plug: NGK BPR6ES

The recommended spark plug is the correct heat range for normal 
engine operating temperatures.

Incorrect spark plugs can cause engine damage.
For good performance, the spark plug must be properly gapped and 
free of deposits.

1. Disconnect the cap from 

the spark plug, and 
remove any dirt from the 
spark plug area.

2. Use the proper size spark 

plug wrench to remove the 
spark plug.

3. Inspect the spark plug. Replace it if 

damaged, badly fouled, if the 
sealing washer is in poor condition, 
or if the electrode is worn.

4. Measure the electrode gap with a 

suitable gauge. The correct gap is 
0.028 - 0.031 in (0.70 - 0.80 mm). If 
adjustment is needed, correct the 
gap by carefully bending the side 
electrode.

5. Install the spark plug carefully, by 

hand, to avoid cross-threading.

6. After the spark plug is seated, tighten with the proper size spark 

plug wrench to compress the washer.

7. When installing a new spark plug, tighten 1/2 turn after the spark 

plug seats to compress the washer.

8. When reinstalling the original spark plug, tighten 1/8 - 1/4 turn after 

the spark plug seats to compress the washer.

9. Attach the spark plug cap to the spark plug.

1. Remove the three flange 

nuts from the recoil starter, 
and remove the recoil 
starter from the engine.

2. Remove the fuel tank from 

the engine without 
disconnecting the fuel 
tube. If the fuel tank 
contains fuel, keep it level 
as you remove it and set it 
beside the engine in a level 
position.

3. Check the brake shoe 

thickness. If it is less than 
0.12 in (3 mm), take the 
engine to your authorized 
Honda servicing dealer.

4. Install the fuel tank and 

recoil starter, and tighten 
the three nuts securely.

In some areas, it is illegal to operate an engine without a USDA 
(United States Department of Agriculture)-qualified spark arrester. 
Check local laws and regulations. A USDA-qualified spark arrester is 
available from an authorized Honda servicing dealer.

The spark arrester must be serviced every 100 hours to keep it 
functioning as designed.

If the engine has been running, the muffler will be hot. Allow it to cool 
before servicing the spark arrester.

Spark Arrester Removal
1. Remove the three 6 mm 

bolts from the muffler 
protector, and remove 
the muffler protector.

2. Remove the two special 

screws from the spark 
arrester, and remove the 
spark arrester from the 
muffler.

Spark Arrester Cleaning & Inspection
1. Use a brush to remove carbon deposits 

from the spark arrester screen. Be careful 
not to damage the screen. Replace the 
spark arrester if it has breaks or holes.

2. Install the spark arrester in the reverse 

order of removal.