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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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running in two stroke power tools
"Sylvain VAN DER WALDE" wrote in message news:... "The Natural Philosopher" wrote in message ... 6 wrote: wrote in message ups.com... I guess this is a good group to ask.. I want to know if you are you generally supposed to "run in" small two stroke engines ? I ask because I have bought a chainsaw and a brush cutter over the last year or so. The chainsaw (Huqvarna 137 ) manual makes no mention of any running in. However for the Brushcutter ( a rather OTT Stihl FS80 ) the user manual advises 'not to operate on full revs. with no load for the first 5 tanks'.. Now why would you do that anyway ? I wander if the chainsaw was run in at the factory since it shoudl be used at full revs all the time. As normal I only read the Bruscutter manual fully after using the thing all afternoon.. Oops.. Still I guess I can take it easier with it next time ? I rather thought it sounded a bit on the metalicy/ clanky side on tickover , but fine at speed. Anyone here got one and tell me what it sounds like? With technology advances in fuels, oils and metals these days it's hardly worth worrying about on such small engines. If you feel like "running in" the machines just follow the advice on the strimmer for both. Basically things these days are machined to very tight tolerances and on a petrol engine slathering in oil lie a 2-stroke, there is no real need. It's not the tolerances that matter, but the finish on the machined surfaces. I, personally, would always run in all new engines and avoid maximum revs during that period. If it bothers you, double up on oil for a tankful and let it idle its way to empty. That's no good. An engine needs to run under a gradually increasing load to become "run in". Sylvain. |
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