{"product_id":"piston-kit-compatible-with-dolmar-ps420-chainsaws-42mm-q9-8eoo-8let","title":"42mm Piston Kit Fits Dolmar PS-420 Chainsaw","description":"\u003cp\u003eA 42mm piston kit for the Dolmar PS-420 chainsaw, the 42.4cc saw. A scored piston is usually a lean condition, so pressure and vacuum test the crankcase and fix any air leak or fuel fault before the new piston goes in. A scored or worn-through cylinder needs replacing along with the piston. Check the cylinder for scoring and aluminum transfer, use a ring compressor, fit the circlips fully and check the carburetor tune.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e42MM PISTON KIT - Piston, rings, wrist pin and circlips.\u003c\/li\u003e\n\u003cli\u003eFITS DOLMAR PS-420 - The 42.4cc saw on a 42mm bore. Check the model on the saw before ordering.\u003c\/li\u003e\n\u003cli\u003eSTANDARD BORE - For the 42mm cylinder. A scored or worn-through cylinder needs replacing along with the piston.\u003c\/li\u003e\n\u003cli\u003eFIND THE CAUSE FIRST - A scored piston is usually a lean condition: an air leak at the intake or crank seals, or a fuel fault. Pressure and vacuum test the crankcase before the new piston goes in.\u003c\/li\u003e\n\u003cli\u003eINSTALLATION - Check the cylinder for scoring and aluminum transfer, use a ring compressor, fit the circlips fully with the gaps away from the notch, and check the carburetor tune before working it hard.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009657041050,"sku":"Q9-8EOO-8LET","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/71Us6Pu-_OL.jpg?v=1793383420","url":"https:\/\/performancesawsupply.com\/products\/piston-kit-compatible-with-dolmar-ps420-chainsaws-42mm-q9-8eoo-8let","provider":"Performance Saw Supply","version":"1.0","type":"link"}