Chainsaw Oil Flow Adjustment

Updated by Juan Velez


This bulletin covers the following models: 100283 (16" Chainsaw), 100XXX (18" Chainsaw).

Please read the instructions carefully before performing service.

*Specifications, descriptions, and illustrations are as accurate as known at the time of publication but are subject to change without notice.

  • To reduce the risk of injury, user must read and understand the operator’s manual before using this product.
  • DO NOT make any adjustments to chainsaw without first stopping the engine, making sure that all moving parts have stopped and disconnecting the spark plug wire.
  • Burns from hot parts — let the unit cool for 30 minutes before touching hot parts.
  • Injury from moving parts
  • To reduce the possibility of fire or explosion, be careful when working around gasoline. Keep cigarettes, sparks and flames away from all fuel‐related part

Tools Required

Flat Tip Screwdriver

Narrow Tip

Heavy Work Gloves

Piece of Cardboard

As large as the chainsaw

Protective Safety Glasses

Ear/Hearing Protection

The chainsaw should not be stored with any fuel or chain oil in the tanks. Fuel and oil should only be added prior to use.

  1. For a chainsaw to safely and effectively cut, its chain needs to have the proper lubrication. If the chain is too dry, not only will it rob the engine of power due to increased friction, but the chain also runs the risk of breaking and possibly injure the operator. Always use safety glasses when working or performing maintenance.
    See below.
  2. Place the unit on a piece of cardboard. Remove the air filter cover nut (turn it counterclockwise), remove the air filter, and set it aside.
    See below.
  3. Disconnect the spark plug lead.
    See below.
  4. Turn chainsaw on its side with the break assembly facing up. The oil adjustment screw is located approximately 1" below the surface where the half-circled notch is shown.
    See below.
  5. With a narrow flat-tipped screwdriver, adjust the oil flow.
  6. To increase the oil flow, turn the automatic oiler adjustment screw counterclockwise.
    To decrease oil flow, turn the automatic oiler adjustment screw clockwise.
    See below.
  7. While always wearing heavy work gloves, grasp the chain and pull it towards the nose of the chainsaw to ensure that the chain moves freely. A properly tensioned chain should still be slightly a little loose on the chainsaw guide bar, but the chain needs to be tight enough that you cannot pull the drive links out of the bar nose. If it requires adjustments, please use Technical Bulletin 190626-90-50-2 (Chainsaw Chain Tension Adjustment). Put on ear/hearing and eye protection. Start the unit and let it warm up about a minute or two. Hold the chainsaw above a log and press on the throttle trigger. Check to see if there is a light oil spray that appears on the top of the log; if not, increase the oil flow; if too much, then decrease flow.
    See below.

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