Grillo CL 620, Use And Maintenance, Page: 14 / 48

13
Drop in engine performance during cutting
– Speed too high for cutting height – Reduce speed
– Raise cutting deck by a few notches
Uneven cutting
– Cutting deck not parallel to ground – Check tyre pressure
– Blades fault – Check that the blades are correctly mounted
– Sharpen or change the blades
– Check the tension of the plate motor belt
Vibrations during operation
– Blades unbalanced – Balance the blade or replace them if damaged.
– Fastenings are loose – Check and fasten the blade fixing screws and the
fixing screws of the engine and chassis.
THE MACHINE DOES NOT REMAIN IN NEUTRAL
Adjust the device (fig. 19) by loosening the counter-nut and acting on the central screws.
ENDING WORK
After mowing, disengage the blade and drive back to base with the cutting deck in the highest position.
To stop, leave the travel lever to the STOP position (2, fig. 2), set the throttle lever on the STOP position
(fig.2 n
°
10), switch off the engine.
STORAGE AND PROLONGED PERIODS OF DISUSE
Store the mower in a dry place, away from atmospheric agents, and preferably cover with a sheet, and follow the
instructions given in the engine manual. Also lubricate all of the articulated joints.
Engines stored over 30 days need to be protected or drained of fuel to prevent gum from forming in fuel system
or on essential carburettor parts. For engine protection, we recommended use of Briggs&Stratton Fuel Stabilizer
available from an Authorized Briggs&Stratton Service Dealer. Mix stabilizer with fuel in fuel tank or storage container.
Run engine for a short time to circulate stabilizer through carburettor. Engine and fuel can be stored up to 24
months.
Note: if stabilizer is not used or if engine is operating on gasoline containing alcohol, e.g. gasohol, remove all fuel
from tank and run engine until it stops from lack of fuel.