RY40502 Ryobi Chainsaw - Overview

Sections of the RY40502

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Oil Pump Assembly – Part Number: 309514001
Oil Pump Assembly
PartSelect #: PS9938751
Manufacturer #: 309514001
This is a genuine manufacturer-sourced part which is specially designed for use with Homelite and Ryobi chainsaws. It is an identical replacement for a missing or damaged oil pump assembly that was in...
  No Longer Available
Cone Spring – Part Number: 671090001
Cone Spring
PartSelect #: PS9995524
Manufacturer #: 671090001
$5.95
  Special Order
Screw (m4 X 12 Mm) – Part Number: 660608001
Screw (m4 X 12 Mm)
PartSelect #: PS9989435
Manufacturer #: 660608001
This is a genuine Homelite replacement part. The screw is designed by the manufacturer for use in chainsaws and lawn mowers. This part is made of metal, and may be found in various locations in the ...
$5.95
  Special Order
Screw (M4 x 9.5 mm) – Part Number: 660610001
Screw (M4 x 9.5 mm)
PartSelect #: PS9989437
Manufacturer #: 660610001
$5.95
  Special Order
OIL TANK CAP – Part Number: 306888001
OIL TANK CAP
PartSelect #: PS18783640
Manufacturer #: 306888001
$8.95
  Special Order
OIL TANK – Part Number: 527414001
OIL TANK
PartSelect #: PS18785680
Manufacturer #: 527414001
$6.95
  Special Order
COVER HOUSING – Part Number: 527423001
COVER HOUSING
PartSelect #: PS18785683
Manufacturer #: 527423001
$9.95
  Special Order
SWITCH TRIGGER – Part Number: 527427001
SWITCH TRIGGER
PartSelect #: PS18785684
Manufacturer #: 527427001
$5.95
  Special Order
OUTPUT OIL TUBE – Part Number: 563438001
OUTPUT OIL TUBE
PartSelect #: PS18786701
Manufacturer #: 563438001
  No Longer Available
INPUT OIL TUBE – Part Number: 563439001
INPUT OIL TUBE
PartSelect #: PS18786702
Manufacturer #: 563439001
$5.95
  Special Order
WRENCH – Part Number: 612330001
WRENCH
PartSelect #: PS18787120
Manufacturer #: 612330001
$5.95
  Special Order
DRIVEN ADJUSTMENT GEAR – Part Number: 612376001
DRIVEN ADJUSTMENT GEAR
PartSelect #: PS18787121
Manufacturer #: 612376001
$5.95
  Special Order

Questions And Answers for RY40502

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Jim
December 28, 2023
My chainsaw won't run the motor at all so i took it apart and tried replacing the switch. That didn't work. I wonder if there is a fuse on this unit or the whole motor controller is bad? When i put in a battery and press the power level button on the battery it shows zero bars. i remove the battery and it shows 3 bars. Something is causing the battery to short out?
For model number RY40502
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Hello Jim, thank you for reaching out. According to our understanding, the issue is with the motor controller and battery connector, party number PS11857128. You may need to replace it to fix the issue. We hope this solves your problem!
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Common Symptoms of the RY40502

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Chain comes off guide bar
Fixed by
these parts
Fixing
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