The MS 250 sits one rung up from the 170: 45.4 cc, same stratified engine family, more low-end torque. It’s the saw we see most often in rural Oregon — firewood cutters, ranchers, part-time loggers who don’t need a pro-grade Magnum.
The starter pawls eat their rope springs by about the 200-tank mark. The tensioner screw strips if you bear down on the bar while tightening (don’t). The oiler adjuster inside the clutch housing gums up if you run bar oil in freezing weather without thinning it. Chains stretch for the first cord, then settle.
Change fuel filter annually. Re-grease the bar nose sprocket every fifth tank. Inspect the chain tensioner guide slot for wear — replace the bar before the chain starts riding sideways.
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