{"title":"Parts That Fit Stihl BR500, BR550, BR600 and BR700","description":null,"products":[{"product_id":"stihl-br500-br550-br600-4-mix-piston-kit-replaces-stihl-part-4282-030-2003","title":"50mm Piston Kit Fits Stihl BR500 BR550 BR600 BR700","description":"\u003cp\u003ePiston kit, 50mm, for the Stihl backpack blower engine. Replaces part number 4282-030-2003, which has superseded to 4282-030-2005. Contents: piston, one piston ring, wrist pin and circlips. The engine is 64.8cc. Fits BR500, BR550, BR600 and BR700. All four are the same engine - they differ in fan housing, blower tube and rated air output, not in the piston, the ring or the valves. The BR700 belongs on that list and is usually left off. What does NOT fit: the BR350, BR430, BR450 and SR450 are a different 63.3cc engine and take piston 4244-030-2006. The FS130, KM130 and HT130 are 43mm. The FS90, KM90 and HL95 are 28.4cc. None of those will take a 50mm piston. The thing to understand about this engine before you rebuild one: it has a valve train, but it has no sump, no oil pump and no oil filter. The entire engine, valves included, is lubricated by the oil mixed into the fuel. Fifty to one, every tank. Running one on straight gasoline does not just seize the piston, it wrecks the valve train, and that is how most of these engines arrive on the bench. Valve clearance is 0.10mm - 0.004 inch - on both intake and exhaust, checked cold. The service manual calls for a check around every 135 running hours. Clearance that has drifted costs power long before it costs you an engine, so set it while the machine is open. The camshaft is gear driven, not belt driven, and the timing marks are painted onto the gear teeth. Line the marked teeth up with the crankshaft mark on reassembly. Piston kit only. Cylinder, valves, gaskets, crankshaft seals and the needle bearing are not included.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e50MM PISTON KIT - Piston, one piston ring, wrist pin and circlips. Replaces Stihl part number 4282-030-2003, which superseded to 4282-030-2005. For the 64.8cc backpack blower engine.\u003c\/li\u003e\n\u003cli\u003eBR500, BR550, BR600 AND BR700 ALL USE THIS PISTON - All four are the same 64.8cc engine. They differ in fan housing, blower tube and rated air output, not in the piston. The BR700 is on that list too, which surprises people.\u003c\/li\u003e\n\u003cli\u003eNEVER RUN IT ON STRAIGHT GAS - This engine has a valve train but no sump, no oil pump and no oil filter. It is lubricated entirely by the oil in the fuel. Fifty to one mix, every tank, no exceptions. Running one on straight gasoline destroys the valve train as well as the piston, and that is what kills most of the engines that end up needing this part.\u003c\/li\u003e\n\u003cli\u003eVALVE LASH IS 0.10MM, INTAKE AND EXHAUST, CHECKED COLD - That is 0.004 inch, the same on both valves. Stihl calls for checking it around every 135 running hours. Lash that has drifted shows up as lost power long before it shows up as a failure, so set it while the machine is apart.\u003c\/li\u003e\n\u003cli\u003eTHE CAM IS GEAR DRIVEN AND THE TIMING MARKS ARE PAINTED - Line the marked teeth on the cam gear up with the crankshaft mark on reassembly. Get it wrong and it will not start. Cylinder, valves, gaskets, crank seals and the needle bearing are not included.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"1","offer_id":34486426108061,"sku":"AX-2IHT-Z5V0","price":32.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/51B0JjCHRPL.jpg?v=1793400347"},{"product_id":"lil-red-barn-4-mix-backpack-blower-piston-kit-fits-stihl-br700-br600-replaces-stihl-part-4282-030-2003-two-day-standard-shipping-to-all-50-states","title":"50mm Piston Only Kit Fits Stihl BR500 BR550 BR600 BR700","description":"\u003cp\u003eA 50mm piston kit for the Stihl BR500, BR550, BR600 and BR700 backpack blowers. The kit contains the piston with ring set, wrist pin and two circlips; gaskets, seals, valves and bearings are not included, so it suits an engine whose gaskets and seals are still good. It replaces piston kit 4282-030-2003. The BR800 family takes 4283-030-2003, which differs in the fourth digit and does not fit; nor does the kit fit the two-stroke BR340, BR380 and BR420. A scored piston on these blowers usually comes from an air leak at a hardened crankshaft seal or intake boot, a blocked fuel filter or the wrong fuel mix, so find and fix the cause before fitting the new piston. Use a ring compressor and set the valve clearance to the service manual figure after assembly.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePISTON ONLY - A 50mm piston with ring set, wrist pin and two circlips. No gaskets, seals, valves or bearings: this is for an engine whose gaskets and seals are still good.\u003c\/li\u003e\n\u003cli\u003eFITS STIHL BR500, BR550, BR600 AND BR700 - The 64.8cc four-stroke backpack blowers with the 50mm bore. Not for the BR800 family, which takes piston 4283-030-2003, or for two-stroke blowers such as the BR340, BR380 and BR420.\u003c\/li\u003e\n\u003cli\u003eREPLACES PISTON KIT 4282-030-2003 - Also written 4282 030 2003. The BR800 number, 4283-030-2003, differs in the fourth digit and does not fit, so check that digit on your parts list.\u003c\/li\u003e\n\u003cli\u003eWHY A PISTON FAILS - A scored piston on these blowers usually comes from an air leak at a hardened crankshaft seal or intake boot, a blocked fuel filter or the wrong fuel mix. Fix the cause first or the new piston goes the same way.\u003c\/li\u003e\n\u003cli\u003eASSEMBLY - Use a ring compressor, fit the circlips fully with the open end away from the notch, check that the piston moves freely on the pin, and set the valve clearance to the service manual figure.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":34486439182493,"sku":"DY-UBF6-SFA2","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/51eYbUgqKiL.jpg?v=1793400405"},{"product_id":"intake-valve-for-stihl-br500-br550-br600-br700-4-mix-backpack-blower-r-6w-e5ol-pwla","title":"Intake Valve 4282-025-1801 Fits Stihl BR500 BR600","description":"\u003cp\u003eIntake valve that fits the Stihl BR500, BR550, BR600 and BR700 backpack blowers. Replaces part number 4282-025-1801; the exhaust valve is a different part, 4282-025-1903. Replace it when compression is low with the rings and bore in good order, the stem is bent, or the face or seat is pitted. Check the seat and guide, lap the valve in until the contact line is even, clean off all lapping compound, and set the valve clearance with the engine cold.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eINTAKE VALVE - Replaces 4282-025-1801, also written 4282 025 1801. The exhaust valve is a different part, 4282-025-1903.\u003c\/li\u003e\n\u003cli\u003eFITS STIHL BR500, BR550, BR600 AND BR700 - The 64.8cc backpack blowers.\u003c\/li\u003e\n\u003cli\u003eSIGNS IT IS DUE - Low compression with the rings and bore in good order, hard starting, a bent stem, or a valve that leaks when tested. Check the face and seat for pitting.\u003c\/li\u003e\n\u003cli\u003eFITTING IT - Check the seat and the guide, lap the new valve in until the contact line is even all round, and clean off every trace of lapping compound. Set the valve clearance with the engine cold.\u003c\/li\u003e\n\u003cli\u003eTHIS ENGINE HAS VALVES - The 64.8cc engine runs on two-stroke fuel mix but has an intake and an exhaust valve. Check the valve clearance at each service; a clearance that has closed up holds a valve open and burns it.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009590685850,"sku":"6W-E5OL-PWLA","price":9.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/41BNKJkqGEL.jpg?v=1793382052"},{"product_id":"intake-exhaust-valve-set-for-stihl-br500-br550-br600-br700-4-mix-backp-r8-lyb1-agqe","title":"2 Engine Valves Fit Stihl BR500 BR550 BR600 BR700","description":"\u003cp\u003eAn intake valve (4282 025 1801) and an exhaust valve (4282 025 1903) for the Stihl BR500, BR550, BR600 and BR700 backpack blowers, which share one 64.8cc four-stroke engine. Replace them for low compression traced to the valves, a burnt or pitted face, or a bent stem. Lap each valve to its seat, check seat width, fit new stem seals if the old ones are hard, and set valve clearance cold to the service manual figure.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eONE INTAKE AND ONE EXHAUST VALVE - The full valve pair for the single-cylinder four-stroke engine.\u003c\/li\u003e\n\u003cli\u003eFITS STIHL BR500, BR550, BR600 AND BR700 - The backpack blowers on the shared 64.8cc engine.\u003c\/li\u003e\n\u003cli\u003eREPLACES 4282 025 1801 INTAKE AND 4282 025 1903 EXHAUST - Fit each in its own port; the intake valve has the larger head.\u003c\/li\u003e\n\u003cli\u003eWHEN THEY NEED REPLACING - Low compression that a leak-down test traces to the valves, a burnt or pitted face, or a bent stem.\u003c\/li\u003e\n\u003cli\u003eINSTALLATION - Lap each valve to its seat, check seat width, fit new stem seals if they are hard, and set valve clearance cold to the service manual figure.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009592946842,"sku":"R8-LYB1-AGQE","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/51DEMcevFFL.jpg?v=1793382123"},{"product_id":"exhaust-valve-for-stihl-br500-br550-br600-br700-4-mix-backpack-blower-i0-72hn-kvjg","title":"Exhaust Valve 4282-025-1903 Fits Stihl BR500 BR600","description":"\u003cp\u003eExhaust valve that fits the Stihl BR500, BR550, BR600 and BR700 backpack blowers. Replaces part number 4282-025-1903; the intake valve is a different part, 4282-025-1801. Replace it when compression is low with the rings and bore in good order, or the valve face or seat is burnt or pitted. Check the seat and guide, lap the valve in until the contact line is even, clean off all lapping compound, and set the valve clearance with the engine cold.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEXHAUST VALVE - Replaces 4282-025-1903, also written 4282 025 1903. The intake valve is a different part, 4282-025-1801.\u003c\/li\u003e\n\u003cli\u003eFITS STIHL BR500, BR550, BR600 AND BR700 - The 64.8cc backpack blowers.\u003c\/li\u003e\n\u003cli\u003eSIGNS IT IS DUE - Low compression with the rings and bore in good order, hard starting, and a valve that leaks when tested. The exhaust valve runs hottest, so look for a burnt or pitted edge on the face and seat.\u003c\/li\u003e\n\u003cli\u003eFITTING IT - Check the seat and the guide, lap the new valve in until the contact line is even all round, and clean off every trace of lapping compound. Set the valve clearance with the engine cold.\u003c\/li\u003e\n\u003cli\u003eTHIS ENGINE HAS VALVES - The 64.8cc engine runs on two-stroke fuel mix but has an intake and an exhaust valve. Check the valve clearance at each service; a clearance that has closed up holds a valve open and burns it.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009596027034,"sku":"I0-72HN-KVJG","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/41BNKJkqGEL_e999c0e4-eb1f-45ff-898c-1a9151a2f714.jpg?v=1793382181"},{"product_id":"50mm-piston-rings-for-stihl-br500-br550-br600-br700-backpack-blower-4-tp-758e-nhua","title":"50mm Piston Rings 4282-034-3000 Fits Stihl BR500 BR550 BR600","description":"\u003cp\u003e50mm standard bore piston rings that fit the Stihl BR500, BR550, BR600 and BR700 backpack blowers. Replaces part number 4282-034-3000. Replace them when compression is low, the blower starts hard when warm or power fades under load. Check the cylinder bore and piston before fitting rings alone, clean the ring grooves, check end gap in the bore with a feeler gauge, stagger the gaps and use a ring compressor. This engine has valves, so check the valve clearance while it is apart.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e50MM PISTON RINGS, STANDARD BORE - Replaces 4282-034-3000, also written 4282 034 3000.\u003c\/li\u003e\n\u003cli\u003eFITS STIHL BR500, BR550, BR600 AND BR700 - The 64.8cc backpack blowers.\u003c\/li\u003e\n\u003cli\u003eSIGNS THEY ARE DUE - Low compression, hard starting when warm, power that fades under load, and oily carbon in the exhaust. Check the cylinder bore and piston before fitting rings alone.\u003c\/li\u003e\n\u003cli\u003eMEASURE BEFORE FITTING - Clean the carbon out of the grooves, roll each ring around its groove to check it moves freely, and push each ring squarely into the bore to check the end gap with a feeler gauge.\u003c\/li\u003e\n\u003cli\u003eON ASSEMBLY - Stagger the ring gaps, use a ring compressor, and pressure and vacuum test the crankcase. This engine has valves, so check the valve clearance while it is apart.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009608544410,"sku":"TP-758E-NHUA","price":9.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/516MBsSeU8L.jpg?v=1793382592"},{"product_id":"crankshaft-seal-set-for-stihl-br500-br550-br600-br700-4-mix-backpack-b-5p-3chx-zknr","title":"2 Crankshaft Seals Fits Stihl BR500 BR550 BR600 BR700","description":"\u003cp\u003eTwo crankshaft oil seals for the Stihl BR500, BR550, BR600 and BR700 backpack blowers, one for each side of the crank. Both sides use the same 15 x 25 x 5mm seal, 9639 003 1585. A hardened seal lets air in and the engine runs lean and hot, so replace both whenever the crankcase is apart. Press them in square without nicking the lips, oil the lips, and pressure and vacuum test the crankcase.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTWO CRANKSHAFT OIL SEALS - One for each side of the crankshaft. Both sides use the same seal, so the two in the bag are identical.\u003c\/li\u003e\n\u003cli\u003eFITS STIHL BR500, BR550, BR600 AND BR700 - The backpack blowers on the shared 64.8cc engine.\u003c\/li\u003e\n\u003cli\u003eREPLACES 9639 003 1585 - The 15 x 25 x 5mm seal, two per engine.\u003c\/li\u003e\n\u003cli\u003eWHY IT MATTERS - A hardened crank seal lets air in, the engine runs lean and hot, and the piston and valves pay for it. Replace both whenever the crankcase is apart.\u003c\/li\u003e\n\u003cli\u003eINSTALLATION - Press the seals in square without nicking the lips, oil the lips before the shaft goes through, and pressure and vacuum test the crankcase before the top end goes on.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009660022938,"sku":"5P-3CHX-ZKNR","price":9.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/41R3eSXMz_L.jpg?v=1793383483"},{"product_id":"stihl-br500-br550-br600-br700-crankshaft-bearings-seals-6c-s90m-kiwb","title":"Crank Bearings and Seals Fits Stihl BR500 BR550 BR600 BR700","description":"\u003cp\u003eCrankshaft bearing and oil seal set that fits Stihl BR500, BR550, BR600 and BR700 backpack blowers. Four pieces: two crankshaft bearings and both crankcase oil seals. Replaces part number 9523-003-4301 for each bearing, and 9639-003-1585 (also listed as 9638-003-1581) for the seals; both sides of the crankshaft take the same size seal. Worn crankshaft seals are a common cause of lean running on backpack blowers. Air drawn in through a hardened seal lip bypasses the carburetor entirely, so the fuel mixture leans out under load and the engine runs hot. Left alone this ends in a scored piston. Because splitting the crankcase is most of the work on this repair, the bearing and both seals are normally replaced together at the same teardown. Pressure and vacuum testing the crankcase before final assembly confirms the seals are sealing and is worth the few minutes it takes.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFITS STIHL BR500, BR550, BR600 AND BR700 backpack blowers. If your blower is bogging, running lean, or will not hold an idle after warming up, worn crankshaft seals are the usual cause - unmetered air gets into the crankcase past a hardened seal lip and the engine leans out. This is the bearing and seal set for that repair, and for any crankcase teardown on these machines.\u003c\/li\u003e\n\u003cli\u003eFOUR PIECES: TWO CRANKSHAFT BEARINGS AND TWO OIL SEALS. Replaces 9523-003-4301 for each bearing. The seals replace 9639-003-1585, also listed as 9638-003-1581; both sides of the crankshaft take the same size seal. Match any of those numbers off your old part or your parts diagram and you have the correct set.\u003c\/li\u003e\n\u003cli\u003eWHY THE BEARINGS GO - A backpack blower spends its working life near full throttle, which is harder on a crank bearing than intermittent saw work. A bearing that runs rough or hot takes the seal with it and then the piston, so replace both bearings while the crankcase is apart.\u003c\/li\u003e\n\u003cli\u003eDO ALL FOUR PIECES AT ONCE. Splitting a crankcase is most of the labor on this job. Replacing a seal and reusing a bearing with 400 hours on it means doing the whole teardown again in a season. Both bearings and both seals are in this set for exactly that reason - if the crankcase is open, all four go in.\u003c\/li\u003e\n\u003cli\u003ePRESSURE AND VACUUM TEST BEFORE YOU BUTTON IT UP. A new seal that is nicked on installation leaks exactly like the old one, and you will not know until the engine is together and running lean again. Seat the seals square with a driver rather than a socket, and test the crankcase to confirm the repair before the shroud goes back on.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009666281626,"sku":"6C-S90M-KIWB","price":27.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/61CBks_gB-L.jpg?v=1793383595"},{"product_id":"50mm-piston-and-seal-kit-fits-stihl-br500-br550-br600-br700-4h-faol-j0wj","title":"50mm Piston and Seal Kit Fits Stihl BR500 BR550 BR600 BR700","description":"\u003cp\u003eA 50mm piston and seal kit for the Stihl BR500, BR550, BR600 and BR700 backpack blowers. The kit contains a 50mm piston with ring set, wrist pin and circlips, two crankshaft seals, the exhaust gasket, the valve cover gasket, a copper washer and a feeler gauge. Valves and crankshaft bearings are not included. It replaces piston kit 4282-030-2003, two crankshaft seals 9639-003-1585, exhaust gasket 4282-149-0600 and valve cover gasket 4282-029-0500. It does not fit the BR800 family, which takes piston 4283-030-2003, or the two-stroke BR340, BR380 and BR420. The seals go in with the piston because a hardened crankshaft seal pulls in air and runs the engine lean, which is the most common way a new piston gets scored. Before installing, check for other air leaks and fuel faults, use a ring compressor, and set the valve clearance with the feeler gauge to the service manual figure.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePISTON, SEALS AND GASKETS - A 50mm piston with ring set, wrist pin and circlips, two crankshaft seals, the exhaust gasket, the valve cover gasket, a copper washer and a feeler gauge. Valves and crankshaft bearings are not included.\u003c\/li\u003e\n\u003cli\u003eFITS STIHL BR500, BR550, BR600 AND BR700 - The 64.8cc four-stroke backpack blowers with the 50mm bore. Not for the BR800 family, which takes piston 4283-030-2003, or for two-stroke blowers such as the BR340, BR380 and BR420.\u003c\/li\u003e\n\u003cli\u003eREPLACES PISTON KIT 4282-030-2003 - With two crankshaft seals 9639-003-1585, exhaust gasket 4282-149-0600 and valve cover gasket 4282-029-0500. If your parts list shows these numbers, this kit covers them.\u003c\/li\u003e\n\u003cli\u003eNEW SEALS WITH THE PISTON - On an older blower the crankshaft seals are usually hard. A leaking seal pulls in air, runs the engine lean and scores the new piston, so they go in together.\u003c\/li\u003e\n\u003cli\u003eBEFORE IT GOES TOGETHER - Find out why the old piston failed: an air leak at a hardened seal or intake boot, a blocked fuel filter or the wrong fuel mix will score a new one. Use a ring compressor and set the valve clearance to the service manual figure.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68073134489754,"sku":"4H-FAOL-J0WJ","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/61maomiW_XL.jpg?v=1793962052"},{"product_id":"full-rebuild-kit-fits-stihl-br500-br550-br600-br700-50mm-pl-k3t5-r7vd","title":"Full Rebuild Kit Fits Stihl BR500 BR550 BR600 BR700 50mm","description":"\u003cp\u003eA complete 50mm rebuild kit for the Stihl BR500, BR550, BR600 and BR700 backpack blowers. The kit contains a 50mm piston with ring set, wrist pin and circlips, an intake valve, an exhaust valve, two crankshaft bearings, two crankshaft seals, the exhaust gasket, the valve cover gasket, a copper washer and a feeler gauge for setting the valves. It replaces piston kit 4282-030-2003, intake valve 4282-025-1801, exhaust valve 4282-025-1903, bearings 9523-003-4301, two crankshaft seals 9639-003-1585, exhaust gasket 4282-149-0600 and valve cover gasket 4282-029-0500. It does not fit the BR800 family, which takes piston 4283-030-2003, or the two-stroke BR340, BR380 and BR420. This engine runs on two-stroke fuel mix but has intake and exhaust valves, so a full rebuild includes the valves, and the clearance has to be set after assembly. Before installing, find out why the old piston failed, since an air leak, a blocked fuel filter or the wrong fuel mix will score a new one. Check the crankshaft journals before fitting the new bearings, use a ring compressor, and set the valve clearance to the service manual figure.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEVERYTHING FOR A FULL REBUILD - A 50mm piston with ring set, wrist pin and circlips, intake and exhaust valves, two crankshaft bearings, two crankshaft seals, the exhaust gasket, the valve cover gasket, a copper washer and a feeler gauge.\u003c\/li\u003e\n\u003cli\u003eFITS STIHL BR500, BR550, BR600 AND BR700 - The 64.8cc four-stroke backpack blowers with the 50mm bore. Not for the BR800 family, which takes piston 4283-030-2003, or for two-stroke blowers such as the BR340, BR380 and BR420.\u003c\/li\u003e\n\u003cli\u003eREPLACES PISTON KIT 4282-030-2003 AND THE MATCHING PARTS - Intake valve 4282-025-1801, exhaust valve 4282-025-1903, bearings 9523-003-4301, two crankshaft seals 9639-003-1585, exhaust gasket 4282-149-0600 and valve cover gasket 4282-029-0500.\u003c\/li\u003e\n\u003cli\u003eTHIS ENGINE HAS VALVES - It is a four-stroke that runs on two-stroke fuel mix, with intake and exhaust valves. Set the valve clearance with a feeler gauge after assembly; wrong clearance makes the blower hard to start and down on power. This is the kit to use when the crankshaft also has roughness or play, because the bearings come with it.\u003c\/li\u003e\n\u003cli\u003eBEFORE IT GOES TOGETHER - Find out why the old piston failed: an air leak at a hardened seal or intake boot, a blocked fuel filter or the wrong fuel mix will score a new one. Use a ring compressor and set the valve clearance to the service manual figure. Check the crankshaft journals before fitting the new bearings; a damaged journal means a new crankshaft.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68073135046810,"sku":"PL-K3T5-R7VD","price":89.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/61H4IKJMrGL.jpg?v=1793962054"},{"product_id":"rebuild-kit-fits-stihl-br500-br550-br600-br700-valves-50mm-xv-1u2i-3yte","title":"Rebuild Kit Fits Stihl BR500 BR550 BR600 BR700 Valves 50mm","description":"\u003cp\u003eA 50mm rebuild kit with valves for the Stihl BR500, BR550, BR600 and BR700 backpack blowers. The kit contains a 50mm piston with ring set, wrist pin and circlips, an intake valve, an exhaust valve, two crankshaft seals, the exhaust gasket, the valve cover gasket, a copper washer and a feeler gauge. Crankshaft bearings are not included. It replaces piston kit 4282-030-2003, intake valve 4282-025-1801, exhaust valve 4282-025-1903, two crankshaft seals 9639-003-1585, exhaust gasket 4282-149-0600 and valve cover gasket 4282-029-0500. It does not fit the BR800 family, which takes piston 4283-030-2003, or the two-stroke BR340, BR380 and BR420. This engine runs on two-stroke fuel mix but has intake and exhaust valves, so the valves are serviced with the piston and the clearance is set after assembly. Use this kit when the crankshaft still turns smoothly with no play; if the bearings are rough, the crankshaft bearings need replacing too. Before installing, find out why the old piston failed, use a ring compressor, and set the valve clearance to the service manual figure.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePISTON, VALVES, SEALS AND GASKETS - A 50mm piston with ring set, wrist pin and circlips, intake and exhaust valves, two crankshaft seals, the exhaust gasket, the valve cover gasket, a copper washer and a feeler gauge. Crankshaft bearings are not included.\u003c\/li\u003e\n\u003cli\u003eFITS STIHL BR500, BR550, BR600 AND BR700 - The 64.8cc four-stroke backpack blowers with the 50mm bore. Not for the BR800 family, which takes piston 4283-030-2003, or for two-stroke blowers such as the BR340, BR380 and BR420.\u003c\/li\u003e\n\u003cli\u003eREPLACES PISTON KIT 4282-030-2003 AND THE MATCHING PARTS - Intake valve 4282-025-1801, exhaust valve 4282-025-1903, two crankshaft seals 9639-003-1585, exhaust gasket 4282-149-0600 and valve cover gasket 4282-029-0500.\u003c\/li\u003e\n\u003cli\u003eTHIS ENGINE HAS VALVES - It is a four-stroke that runs on two-stroke fuel mix, with intake and exhaust valves. Set the valve clearance with a feeler gauge after assembly; wrong clearance makes the blower hard to start and down on power. This kit is for an engine whose crankshaft still turns smoothly with no play.\u003c\/li\u003e\n\u003cli\u003eBEFORE IT GOES TOGETHER - Find out why the old piston failed: an air leak at a hardened seal or intake boot, a blocked fuel filter or the wrong fuel mix will score a new one. Use a ring compressor and set the valve clearance to the service manual figure.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68073136554138,"sku":"XV-1U2I-3YTE","price":64.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/61uPXqYUqtL.jpg?v=1793962057"}],"url":"https:\/\/performancesawsupply.com\/collections\/parts-that-fit-stihl-br500-br550-br600-and-br700.oembed","provider":"Performance Saw Supply","version":"1.0","type":"link"}