
Engine Model:
RV150 and SV150
RV40, V35
Page
16 of 36 Mountfield150cc Selfhelp Guide 2011, Issue 1.0
6 Engine Starts and Smokes Heavily
QUICK TROUBLESHOOTING GUIDE:
Problem: Likely Cause: Solution:
White, blue or
grey smoke from
exhaust
• Over-filled with oil
• Mower has been tipped incorrectly
Reduce oil (see A)
• Remove oil from
cylinder (see B)
Oil coming from
exhaust
• Over-filled with oil
• Mower has been tipped incorrectly
Reduce oil (see A)
• Remove oil from
cylinder (see B)
A:
Do not overfill the engine with oil. See 3
Routine Engine Maintenance for checking and
draining engine oil.
If overfilled with oil, drain to the correct level
and
follow the instructions in B below.
Oil capacity is 0.6 litre
B: This is a general indication that the mower has been over-filled with oil, or
tipped incorrectly (perhaps inadvertently). It can be resolved without the
intervention of a service dealer.
1. Place the mower on a level surface (not the lawn or a good patio).
Check the oil level in the sump, top up if necessary. Check the level
of fuel in the tank and top this up (the mower once started may need
to run for up to 40 minutes). Remove the air filter assembly.
2. The filter is located on the right hand side of the engine (viewed from
the back). The filter should be just sticky to the touch with oil. If very
oily, clean the foam filter in hot soapy water, dry and lightly oil it.
Squeeze to remove any excess oil.
3. Remove and clean the spark plug completely. ONLY USE A
GENUINE SPARKPLUG SPANNER.
With the sparkplug removed, hold in the OPC and pull the starter cord
6 times to eject any oil from the spark plug hole.
4. Replace the plug and start the engine in the normal way. The engine
will smoke quite badly at first, but allow the engine to continue
running for at least ten minutes. The smoke will begin to dissipate.
Never mow any grass with the air filter removed.
5. Stop the engine and refit the cleaned and correctly-oiled air filter.
Please dispose of old fuel and used engine oil in a manner that
is compatible with the environment
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