Ryobi 43160a User Manual

When servicing, use only identical replacement 
parts. Use of any other parts could create a 
hazard or cause product damage.

Always wear eye protection with side shields 
marked to comply with ANSI Z87.1, along with 
head protection. Failure to do so could result in 
objects being thrown into your eyes and other 
possible serious injuries.

Before inspecting, cleaning or servicing the unit, 
stop the motor, wait for all moving parts to stop, 
and disconnect from power supply. Failure to 
follow these instructions can result in serious 
personal injury or property damage.

Avoid using solvents when cleaning plastic parts. 
Most plastics are susceptible to damage from 
various types of commercial solvents and may be 
damaged by their use. Use clean cloths to remove 
dirt, dust, oil, grease, etc.

Do not at any time let brake fluids, gasoline, 
petroleum-based products, penetrating oils, etc., 
come in contact with plastic parts. Chemicals can 
damage, weaken, or destroy plastic, which could 
result in serious personal injury.

All chain saw service, other than the items listed in 
the instruction manual maintenance instructions, 
should be performed by competent chain saw 
service personnel. (For example, if improper tool 
is used to  hold the flywheel in order to remove 
the clutch, structural damage to the flywheel could 
occur and subsequently could cause the flywheel 
to burst).

To avoid possible serious injury, never touch or 
adjust the chain while the motor is running. The 
saw chain is very sharp; always wear protec-
tive gloves when performing maintenance to 
the chain.



  Stop the motor and disconnect from power 

supply before setting the chain tension. Make 
sure the guide bar nut is loose to finger tight, 
turn the chain tensioning screw clockwise to 
tension the chain.  Refer to 

and Chain for additional information.

 

NOTE:  A cold chain is correctly tensioned when 

there is no slack on the underside of the guide 
bar, the chain is snug, but it can be turned by 
hand without binding.



   Chain must be re-tensioned whenever the flats on  

the drive links hang out of the bar groove as 
shown in fig. 11.



   During normal operation, the temperature of the 

chain will increase. The drive links of a correctly 
tensioned warm chain will hang approximately 
.050 in. out of the bar groove, as shown in 
fig. 12.

Fig. 12

Fig. 11