How to Increase the Oil Pump Flow of a Chainsaw?
3 Answers
The oil pump flow of a chainsaw can be increased by inserting a screwdriver into the bottom hole on the clutch side and loosening the inner adjustment. Below are details about the oil pump adjustment: 1. Adjustment Method: Tightening reduces the flow while loosening increases it. Specifically, locate the semi-circular hole at the bottom of the chainsaw—the screw inside can be adjusted. Turning clockwise tightens (reduces flow), and turning counterclockwise loosens (increases flow). 2. Adjustment Steps: First, turn off the engine. Look behind the drive shaft of the chainsaw, slightly loosen the fixed screw of the transmission bearing. There is an adjustment valve between the chain and the bearing, which can be adjusted with a screwdriver. Rotate it slightly by half or a full turn, then manually turn the chain to check the tension. Once properly adjusted, secure the fixed screw and finally reattach the cover.
I've been repairing chainsaws for over ten years and have encountered many oil pump issues. The main purpose of increasing oil flow is to better lubricate the chain, preventing jams or wear. First, turn off the machine to ensure safety, then clean the oil pump area with a cloth. There's usually a small adjustment screw at the bottom of the body. For most models, turning the screw counterclockwise increases the flow. Be careful when adjusting the screw—turn it little by little and avoid using excessive force to prevent damaging the parts. After adjustment, run the machine for a few seconds to observe the oil flow on the chain; ideally, there should be slight oil droplets. If the oil flow is too high, it may leak and stain clothes or the ground. It's recommended to check every few uses, and if the chain is dry, adjust the oil pump first rather than replacing it. The quality of the oil is also crucial—use reputable brand oil.
I've been into DIY tools for years, and adjusting the oil pump on a chainsaw is basic maintenance. After shutting it off, locate the adjustment screw, which might be on the side or under the rear cover. I remember the first time I used a regular screwdriver to turn it counterclockwise slightly by half a turn, then started it up to see if the chain oil drips increased. Take your time and try a few times until the oil flow is just right. Too much will waste oil and cause splashing, while too little will make the chain heat up quickly. Regularly cleaning the filter and oil tank is also important to make adjustments more effective. I usually test the adjustment by making a short cut on wood. This kind of maintenance is common when working outdoors.
