Cleaning The Spark Arrester; Checking The Spark Plug - SDMO HX 7500 T-C Manuel D'utilisation Et D'entretien

7.4. Renewing the motor oil
Observe the advice for protecting the environment (cf. Protecting the environment section) and drain the oil into an appropriate
container.
With the engine still warm, remove the dipstick/filler plug (diag. C – no. 2) and the drain plug (diag. C – no. 1).
When completely drained, screw the drain plug (diag. C - no. 1) back in fully.
Fill the engine oil sump with the recommended oil, then check the level.
Refit and tighten the dipstick/filler plug (diag. C - no. 2).
Check that there are no oil leaks after filling.
Wipe off any trace of oil with a clean cloth.

7.5. Cleaning the spark arrester

Undo the two 12 mm mounting nuts (diag. F – no. 4) and remove the exhaust silencer (diag. F – no. 5) from the cylinder.
Undo the five 5 mm screws (diag. F – no. 1) securing the silencer guard (diag. F – no. 2) and remove the guard device.
Remove the 4 mm mounting screw (diag. F – no. 3) from the spark arrester and remove the spark arrester (diag. F – no. 6).
Using a wire brush, remove the carbon deposits from the spark arrester screen (diag. F - no.6).
Note: The spark arrester must have no holes or cracks. Replace if necessary.
Refit the spark arrester, the guard and the exhaust silencer in the reverse order to removal.

7.6. Checking the spark plug

Remove the cap (diag. B - no. 1) from the spark plug, then remove the spark plug (diag. B - no. 2) using a spark plug spanner.
Check the condition of the spark plug:
If the electrodes are worn or if the insulation is split or flaking:
Replace the spark plug.
Fit a new spark plug in position and tighten it by hand to
avoid damaging the threads.
Use a spark plug spanner to tighten the spark plug by 1/2
turn after it is seated to compress the washer.
7.7. Checking bolts, nuts and screws
To prevent faults or breakdowns, carefully check all the nuts, bolts and screws on a daily basis.
Inspect the entire generating set before and after each use.
Tighten any loose nuts or bolts.
The cylinder head bolts must be tightened by a specialist. Refer to the agent for your region.
Warning
Otherwise:
Clean the spark plug with a metal brush.
With a feeler gauge, check the electrode gap "X": it must be
between 0.7 and 0.8 mm inclusive.
Check the condition of the washer.
Fit the spark plug in position and tighten it by hand to avoid
damaging the threads.
Use a spark plug spanner to tighten it by 1/8-1/4 turn after it
is seated to compress the washer.