# Guides

- [Which chainsaw sizes should a distributor stock? 25cc to 105cc explained](https://www.outdoorpowerfactory.com/blog/chainsaw-displacement-guide-for-distributors/): A practical guide to building a chainsaw range: what 25cc, 45cc, 58cc, 72cc, 92cc and 105cc saws are used for, which bar lengths to pair, and how to balance stock.
- [2-stroke vs 4-stroke brush cutters: which should you sell?](https://www.outdoorpowerfactory.com/blog/2-stroke-vs-4-stroke-brush-cutter/): Weight, power, fuel, noise and maintenance compared, with advice on which engine type fits farm, landscaping, rental and municipal buyers.
- [What fuel mix does a 2-stroke garden machine need? 25:1, 40:1 and 50:1 explained](https://www.outdoorpowerfactory.com/blog/2-stroke-fuel-mix-ratio/): How 2-stroke fuel ratios work, how to mix them correctly, which ratio to follow, and the mistakes that destroy engines.
- [How to size a gasoline generator: running watts, starting watts and 50/60 Hz](https://www.outdoorpowerfactory.com/blog/how-to-size-a-gasoline-generator/): A step-by-step method to choose the right generator size for homes, shops and sites, with worked examples and voltage and frequency notes for importers.
- [Mist duster or knapsack power sprayer? Choosing crop-protection equipment](https://www.outdoorpowerfactory.com/blog/mist-duster-vs-knapsack-power-sprayer/): How mist dusters, piston power sprayers and manual sprayers differ, and which one fits orchards, vegetables, rice and public-health spraying.
- [Earth auger buying guide: engine size, bit diameter and soil type](https://www.outdoorpowerfactory.com/blog/earth-auger-buying-guide/): How to choose a gasoline earth auger for fencing, tree planting and construction, including engine size, bits, gear ratio and safety.
- [Importing garden machinery from China: a buyer's checklist](https://www.outdoorpowerfactory.com/blog/importing-garden-machinery-from-china-checklist/): From samples and specifications to certification, branding, inspection, packing and shipping documents: the steps importers use to reduce risk.
- [CE, EURO II and EURO V on outdoor power equipment: what they mean](https://www.outdoorpowerfactory.com/blog/ce-euro-ii-euro-v-explained/): A plain-English explanation of CE marking and EURO-stage engine emission levels on chainsaws, brush cutters, engines and generators, and what importers should ask for.