93. Installation (Fig. 14)○ Install cutting head on gear case of grass trimmers/brushcutters. The mounting nut is left-hand-threaded. Turn clockwiseto loosen/counterclockwise to tighten.20Fig. 14NOTE○ Since the cutter holder cap is not used here, keep it for when ametal blade is used, if so equipped.○ Press the stopper pin (20) of the gear case in order to lock thecutter holder.4. Adjusting line length○ Set the engine speed as low as possible and tap the head onthe ground. The nylon line will be drawn out about 3 cm witheach tap. (Fig. 15)Fig. 15Also, you can extend the nylon line by hand but the engine mustbe completely stopped. (Fig. 16)Fig. 16○ Adjust the nylon line to the proper length of 11–14 cm beforeeach operation.Installation of cutting blade (Fig. 17)(If so equipped)When installing a cutting blade, make sure that there are no cracksor any damage in it and that the cutting edges are facing the correctdirection.NOTE○ When installing cutter holder cap (21), be sure to set concaveside upward.○ Press the stopper pin (20) of the angle transmission in orderto lock the cutter holder (22). Please note that the cutter fixingbolt or nut (23) has left-handed threads, (clockwise to loosen/counter-clockwise to tighten). Tighten the fixing bolt or nut withthe box wrench.23212220Fig. 17CAUTION○ Before operation, make sure the blade has been properlyinstalled.○ If your unit is equipped with protection cover under a cuttingblade, check it for wear or cracks before operation. If anydamage or wear is found, replace it, as it is an article ofconsumption.○ You have to wear gloves when handling the cutting blade.WARNINGFor Tanaka heads, use only flexible, non-metallic linerecommended by the manufacturer. Never use wire or wireropes. They can break off and become a dangerous projectile.OPERATING PROCEDURESFuel (Fig. 18)Fig. 18WARNING○ The trimmer is equipped with a two-stroke engine. Always runthe engine on fuel, which is mixed with oil.Provide good ventilation, when fueling or handling fuel.○ Fuel contains highly flammable and it is possible to get theserious personal injury when inhaling or spilling on your body.Always pay attention when handling fuel. Always have goodventilation when handling fuel inside building.Fuel○ Always use branded 89 octane unleaded gasoline.○ Use genuine two-cycle oil or use a mix between 25:1 to 50:1,please consult the oil bottle for the ratio or Tanaka dealer.○ If genuine oil is not available, use an anti-oxidant added qualityoil expressly labeled for air-cooled 2-cycle engine use (JASOFC GRADE OIL or ISO EGC GRADE). Do not use BIA or TCW(2-stroke water-cooling type) mixed oil.○ Never use multi-grade oil (10 W/30) or waste oil.○ Always mix fuel and oil in a separate clean container.Always start by filing half the amount of fuel, which is to be used.Then add the whole amount of oil. Mix (shake) the fuel mixture. Addthe remaining amount of fuel.Mix (shake) the fuel-mix thoroughly before filling the fuel tank.