Question about McCulloch Garden
Chainsaw wants to die when i turn my choke off or bogs way down and wont turn chain till i turn choke on half way do i need to adjust the high or low adjustments or the timeing or whats my problem its a macculloch 3516
Generally you shouldn't have to adjust the carb settings. It is probably due to an incorrect air/fuel ratio but could be caused by a few different things. First of all, check your air filter and clean if needed. If this is ok then you might have an air leak some where. Make sure your carb is screwed tight onto the machine and that all the gaskets and manifolds are fine. If there is a rubber tube going from the carb to the cylinder, put some soapy water on it and check for bubbles. If you see any then there is a compression leak and this is the cause of the problem. Other wear parts that may develop an air leak are the crank seals and piston rings. These would be best checked at a workshop where they can do full pressure testing. One other thing to chceck is the exhaust. Most exhausts have a spark arrester. This is a bit of gauze on or near the outlet. If this becomes to dirty then it can affect the performance. It is normally easy to remove, clean and refit. You could also take the exhaust of and make sure it isn't too 'coked up' with carbon. While the exhaust is off, just check through the manifold and make sure there is no scoring on the piston or cylinder as this would also cause pressure leak. This would only happen if you have been using dirty fuel, fuel without the correct oil mixture or if the cooling fans on the cylinder are blocked.
One last thought, and it is a fairly common one in my workshop. Old or stale fuel will not burn efficiently. If you have a quick sniff and it really hits the back of your throat then you might need to put some fresher stuff in and give it another go. You would be shocked at the amount of gardening equipment we get in that has been layed up over winter with the fuel in that won't start in the beginning of spring/summer.
Posted on Oct 26, 2008
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Posted on Jan 02, 2017
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