Stihl RM 756 GC - Troubleshooting Common Issues

0478 111 9937 B - EN
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17.1 REACH
REACH is an EC Directive for the
registration, evaluation, authorisation and
restriction of chemicals.
Information on compliance with the
REACH Directive (EC) No. 1907/2006 is
available from www.stihl.com/reach.
Fault:
Engine does not start
Possible cause:
– Throttle lever set to Stop position
– Choke is not actuated
– No fuel in tank
– Inferior, dirty or old fuel in tank
– Insufficient flow of fuel
– Spark plug dirty or damaged
– Incorrect electrode gap
– Spark plug socket detached from the
spark plug
– Engine is flooded due to several
starting attempts
– Dirty air filter
– Throttle cable is damaged (e.g. kinked)
Remedy:
– Set throttle lever to the Choke or Start
position (Ö 10.1)
– Set throttle lever to the Choke position
(Ö 10.1)
– Refill fuel tank (Ö 7.5)
– Clean fuel system and carburettor;
always use fresh, good quality fuel @,
#, (Ö 7.5)
– Check fuel line @, #
– Clean or replace spark plug @
– Adjust electrode gap #
– Connect spark plug socket; check
connection between ignition lead and
socket #
– Remove spark plug and dry; set throttle
lever to STOP position and pull recoil
starter rope several times with spark
plug removed; screw in spark plug and
connect spark plug socket @
– Clean/replace air filter @
– Repair throttle cable #
Fault:
Starting problems or deteriorating engine
power
Possible cause:
– Mowing at an excessively low cutting
height or fast speed
– Water in fuel tank and carburettor;
carburettor blocked
– Fuel tank contaminated
–Air filter dirty
– Spark plug dirty
Remedy:
– Adapt cutting height and reduce
mowing speed
– Empty fuel tank, clean fuel line and
carburettor #
– Clean fuel tank #
– Clean/replace air filter @, #
– Clean spark plug #
Fault:
Engine cuts out during operation
Possible cause:
– Fuel cock closed
– Tank ventilation screw closed
– Blade brake clutch overloaded
Remedy:
– Open the fuel cock (Ö 10.1)
– Open the tank ventilation screw
(Ö 10.1)
– Clean the mowing channel, empty the
grass catcher bag (Ö 9.)
Fault:
No drive when self-propulsion lever is
actuated
Possible cause:
– Self-propulsion cable incorrectly
adjusted
– Self-propulsion cable damaged
(e.g. kinked)
– V-belt worn
Remedy:
– Check the adjustment (Ö 11.9)
– Replace the cable #
– Replace the V-belt #
RM 756.0 GS
Self-propulsion, rear
wheels 3 V (3-speed)
Weight 60 kg
RM 756.0 YC
Self-propulsion, rear
wheels
Hydrostatic
gearbox, contin-
uously variable
Weight 61 kg
RM 756.0 YS
Self-propulsion, rear
wheels
Hydrostatic
gearbox, contin-
uously variable
Weight 60 kg
18. Troubleshooting
# If necessary, contact a specialist
dealer; STIHL recommends STIHL
specialist dealers.
@ See engine instruction manual.