Question about Homelite ZR10926 16" Chain Saw

1 Answer

Chainsaw will start then start smoking then shut off. What could be causing this not to keep running?

Posted by gilvallo on


1 Answer

Andrew White

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There is only one reason for excessive smoke from the exhaust, and that is because it is burning oil, and the oil can only come from the petrol ,so you need to refill the fuel tank with a fresh fuel/oil mix good quaility oil at 50-1 and try again. Is it possible you may have put chain oil with the fuel, or put it in the fuel tank rather than the oil tank?

Posted on Feb 10, 2011


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  • 99 Answers

SOURCE: chainsaw won't keep running except on full throttle?

Running at full throttle but not at idle would probably be caused by not enough air getting through to the cylinder with the fuel. This could be caused by blocked/dirty air filter, air leak or worn/damaged piston or cylinder. The higher the revs are the less air to fuel ratio is needed so it will run at these speeds. First check your air filter, if that is fine take the spark plug out and examine the inside of the cylinder. You will need to check here with the piston down. If you want to be a bit more thorough you can remove the exhaust and check the piston face and inside the cylinder from here aswell. You don't want to see any scoring or solid lumps of anything in here. While you have the exhaust off give it a few firm taps to make sure there is no major carbon build up and clean the spark arrestor if it has one. The arrestor is normally a small gause found on or near the exaust outlet pipe. If that all seems fine then get some soapy water and squirt it around the carb gaskets and pipe that runs from the carb to the cylinder. If you see bubbles appearing here when the machine is running then you have air escaping and it will need investigating. Failing this you could have worn piston rings or crank seals. Ideally to test this area you need proper pressure testing equipment.

Posted on Oct 27, 2008



  • 2 Answers

SOURCE: chainsaw carburetion

Had a similar sounding problem with my stihl MS 250. After two years of heavy and frequent use (with minimal maintenance) it ran perfectly but after three years of little use with no maintenance it began to die if the revs were allowed to drop, ie it wouldn't idle. I hadn't been draining the tank when not in use so assumed a carb gunk problem. Can also be caused by an oily mix or old fuel.

Today I removed the old fuel and fuel filter and sprayed the tank and up the fuel line with carb cleaner. Then I removed the spark plug and filled the chamber with carb cleaner (use a straw to direct), I removed the air filter and sprayed carb cleaner in here too. I gently pulled the starter cord a few times to spread the carb cleaner. I left it for 1/2 hour while I had lunch.

I then rinsed out the fuel tank with fresh fuel, renewed the air filter, spark plug, fuel filter and fuel. I checked the H and L screws were in the right place (they were), before pulling on the starter a few times to prime / flood the chamber. I then removed the spark plug for 5 mins and had a cup of tea while the flooded chamber resolved / evaporated, then fired her up. It worked well all afternoon.

No need for any tricky or delicate stuff if you give this a go first is my advice. Cost only of spark plug, air and fuel filters, fresh 2" mix and a can of carb cleaner. Took less than an hour excluding interruptions. Saved a potentially expensive trip to the shop where I'd have been billed for these parts as a routine matter.

Posted on Jan 02, 2009

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chainsaw won't start - any ideas? [Archive] - Straight Dxxe ... > ... > Main > General Questions

21 posts - ‎11 authors
Jan 31, 2016 • Garden

The saw runs but chain doesn't turn and it starts t smoke, is the clutch bad ?

Sounds like you haven't read the manual.! Is the chain brake still on.?? The chainsaw has a centrifugal clutch, the more the saw revs, the harder the clutch grips. Sounds like you have the chain brake applied and the clutch is trying to turn the drum which is being held by the brake band

Reddy repair center

There are four possible answers to this problem, if the heater starts normally, runs for a few seconds or minutes and the shuts down but was still running normally at the time of shut down, this could be caused by the photocell, also known as the flame out control. This safety device may be failing, shutting down even though the heater is working normally, check the operation of the photocell. The second cause may be partial fuel filter blockage, the heater is effectively starving itself of fuel, so the flame blows out, hence the puff of smoke, and then shuts down on the safety cut out. Third cause, if this model has a compressor at the rear of the motor, the problem could be low pump pressure, caused by wear or contamination of the carbon blades, this would cause the wrong amount of fuel to be syphoned up, with weak fuel mix the heater may blow itself out and shut down. The fourth cause, perhaps indicated by the puff of white smoke, is contamination of the fuel with water, water will cause the white smoke and also is indecated by white residues or a power like substance on the end plate of the heater which glows red hot when burning.

Ryobi rcs4040ca chainsaw

Its unusual for a saw to start actually smoking, are you sure the chainbrake has not come on and you have been running it, this will make it smoke and damage the clutch, sprocket and brake.Remove the side cover and check for signs of heat,
Aug 31, 2013 • Garden


Check your carburetor. You probably have a bad one and will need to replace it.

If you need further help, I’m available over the phone at


Rancher 455 wont stay running

you need too adjust the high jet ccw (making it richer) do do that takes
a little work cause you need a special tool but I can help you around that if you like. let me know

Starts runs for a minute two the shuts down and blowes smoke

jerome kr406,

This is a classic problem with the reddy heaters. They have a filter which over time plugs up. This causes the air/fuel mixture ratio to change because the pump pressure is determined by the air bleed. As the filter plugs the air pressure drops and the fuel also drops meaning the burner is running lean. This eventually causes the unit to shut down and as you said smoke comes out. It is a fairly easy fix and I have a tip which will walk you through it at . My tip will link you to the place to get the parts you need as well as how to perform the additional maintenance that these heaters require.

Thanks for using FixYa and for the excellent rating. Great ratings help to keep experts helping everyone solve their problems. Thank you.


ECHO CS 3000 chainsaw-while idling, shuts off if held on an angle

The idle speed screw may be set too low--adjust so that the chain stops moving, but the engine keeps running. Drain the fuel tank and see if the filter falls to the lowest point of the tank whatever the position. If it doesn't, replace the fuel line hooked to the filter as it may have lost flexibility. Hope this helps!

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Hard starting can sometimes be caused by a clogged air filter which is where I would start. Clean the filter, if you have the operators manual it explains how to do this, if you don't have the manual check Echo's website to see if you can download one. Next check the manual and see if the carburetor can be adjusted, but be very careful to follow the instructions in the manual exactly or you could do irreparable damage to the needle jets in the carburetor.

I can start up the chainsaw, but chain doesn't spin

Is the chain brake on? Pull the lever your knuckles are against toward you to unlock the anti-kickback brake.
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