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Chainsaw won't start.

I get spark and fuel. Can it be the air/fuel mixture? How do I set those? Also, any other common problems? It ran fairly well until it set for awhile. I have emptied out and refilled with fresh fuel mixture. Do you know the right spark plug for it? I think my son got the right one,but I don't have the old one to check. Thanks.

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  • dontbother10
    dontbother10 May 11, 2010

    For it to run it needs 1. spark (at the plug), 2. fuel (in the carborator), and 3. compression does it have all these? 1. Remove the spark plug, connect a wire between the cooling fins and the threaded portion of the plug. Place the switch in the start position and enter a dark room. Pull the starter while watching the plug. Do you see spark? If no report EVERYTHING you did along with the make, model, and serial number on the manufacturer's tag. If yes - turn off switch - reinstall the plug - continue to 2 2. Put a little fuel mix directly into the carburator - listen INTENTLY while attempting the "Cold engine" start procedure from your manual. If it sputters open the choke and continue trying to start. Report EVERYTHING you did along with the make, model, and serial number on the manufacturer's tag. HTH Lou

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  • Master
  • 4,088 Answers

Check with an auto parts supplier for the correct spark plug number. Actually, any clean plug that fits the hole will allow the engine to start, but don't start sawing until the right one is installed.Try spraying some starting fluid into the plug hole, install the plug and see if it will pop. If the H and L adjustment screws have been played with--turn both to CW stops (lightly) and back out CCW 1-1/2 turns each. This basic setting should allow the engine to run and accelerate. If this gets it running, warm up the engine, then pull the throttle full on and adjust H for high speed, but 4-stroking. It should smooth out immediately when cutting wood. Release the throttle and adjust L for smooth idle, but rich enough to allow the engine to 'follow the throttle'. Adjust idle speed so that the chain just stops moving.

Posted on Sep 13, 2009

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