{"product_id":"husqvarna-503936601","title":"Husqvarna 503936601 Air Purge Bubble | OEM Primer Bulb","description":"\u003cdiv class=\"product-description husqvarna-503936601-air-purge-bubble\"\u003e\n\u003ch2\u003eHusqvarna 503936601 Air Purge Bubble - OEM Primer Bulb\u003c\/h2\u003e\n\u003cp\u003eThe Husqvarna 503936601 Air Purge Bubble is a genuine OEM replacement purge bulb used on select Husqvarna and related handheld equipment. This part is commonly called an air purge bubble, primer bulb, fuel purge bulb, or carburetor purge bubble.\u003c\/p\u003e\n\u003cp\u003eA worn, cracked, hard, leaking, or collapsed purge bulb can make equipment difficult to start or prevent fuel from priming correctly. Replacing the purge bubble helps restore proper fuel priming on compatible chainsaws, trimmers, brushcutters, hedge trimmers, blowers, and cut-off saws.\u003c\/p\u003e\n\u003cp\u003eAlways verify your full model number, model year\/version, carburetor setup, original part number, and parts diagram before ordering. Do not order by model name alone.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Husqvarna\u003c\/li\u003e\n\u003cli\u003ePart Number: 503936601\u003c\/li\u003e\n\u003cli\u003eProduct Type: Air Purge Bubble \/ Primer Bulb \/ Purge Bulb\u003c\/li\u003e\n\u003cli\u003eCommon Location: Carburetor \/ fuel purge system\u003c\/li\u003e\n\u003cli\u003eCommon Applications: Select chainsaws, trimmers, brushcutters, hedge trimmers, blowers, pole saws, and cut-off saws\u003c\/li\u003e\n\u003cli\u003eOEM \/ Aftermarket: Genuine OEM Husqvarna replacement part\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFits Select Models\u003c\/h2\u003e\n\u003cp\u003eThis is a where-used reference list only. The Husqvarna 503936601 purge bubble fits many versions of the models below, but fitment can vary by production date, carburetor, fuel line layout, and parts diagram.\u003c\/p\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary\u003eCommon Husqvarna Chainsaw Models\u003c\/summary\u003e\n\u003cul\u003e\n\u003cli\u003e135, 135 E\u003c\/li\u003e\n\u003cli\u003e140, 140 E\u003c\/li\u003e\n\u003cli\u003e334 T, 338 XPT\u003c\/li\u003e\n\u003cli\u003e340, 340 E, 345, 345 E, 346 XP, 350, 353\u003c\/li\u003e\n\u003cli\u003e435, 435 E, 440 E, 445, 445 E, 450, 450 E\u003c\/li\u003e\n\u003cli\u003e455 E, 455 Rancher, 455 Rancher II\u003c\/li\u003e\n\u003cli\u003e460, 461\u003c\/li\u003e\n\u003cli\u003e545, 550 XP, 555, 560 XP, 562 XP\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCommon Husqvarna Trimmer, Brushcutter, and Clearing Saw Models\u003c\/summary\u003e\n\u003cul\u003e\n\u003cli\u003e223 L, 223 R, 232 L, 232 R\u003c\/li\u003e\n\u003cli\u003e235 FR, 235 R, 235 R II\u003c\/li\u003e\n\u003cli\u003e241 R, 241 RJ\u003c\/li\u003e\n\u003cli\u003e323 C, 323 L, 323 LD, 323 R, 323 RII, 323 RJ\u003c\/li\u003e\n\u003cli\u003e325 C X, 325 CX, 325 Lx, 325 LDx, 325 RX, 325 RJX, 325 RD\u003c\/li\u003e\n\u003cli\u003e326 C, 326 L, 326 Lx, 326 LDx, 326 LS, 326 RJX, 326 RX\u003c\/li\u003e\n\u003cli\u003e327 LDx, 327 LS, 327 Lx, 327 RDX, 327 RJX, 327 RX\u003c\/li\u003e\n\u003cli\u003e333 R, 333 RJ\u003c\/li\u003e\n\u003cli\u003e335 FR, 335 LS, 335 LX, 335 R, 335 RJX, 335 RX\u003c\/li\u003e\n\u003cli\u003e336 FR, 336 FRD\u003c\/li\u003e\n\u003cli\u003e343F, 343FR, 343R\u003c\/li\u003e\n\u003cli\u003e345 FR, 345 FX, 345 FXT, 345 RX, 345R\u003c\/li\u003e\n\u003cli\u003e355 FX, 355 FXT, 355 RX, 355FRM\u003c\/li\u003e\n\u003cli\u003e535 FBX, 535 LS, 535 RJ, 535 RX, 535 RXT\u003c\/li\u003e\n\u003cli\u003e545 FX, 545 FXT, 545 RX, 545 RXT\u003c\/li\u003e\n\u003cli\u003e555 FRM, 555 FX, 555 FXT, 555 RXT\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCommon Hedge Trimmer, Edger, Pole Saw, and Attachment Models\u003c\/summary\u003e\n\u003cul\u003e\n\u003cli\u003e323 Ex, 323 HD60, 323 HE3, 323P\u003c\/li\u003e\n\u003cli\u003e325 HD60, 325 HD75, 325 HDA55, 325 HDA65, 325 HE3, 325 HE4, 325 HS75, 325 HS99, 325P\u003c\/li\u003e\n\u003cli\u003e326 ES, 326 HD60, 326 HD75, 326 HDA55, 326 HE3, 326 HE4, 326P, 326P5\u003c\/li\u003e\n\u003cli\u003e327 ES, 327 HDA65, 327 HE3, 327 HE4, 327 PT5S, 327P\u003c\/li\u003e\n\u003cli\u003eHA 110, HA 850\u003c\/li\u003e\n\u003cli\u003eHedge trimmer attachments HA110 and HA850 where specified\u003c\/li\u003e\n\u003cli\u003eSaw attachment models where specified\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCommon Blower and Cut-Off Saw Models\u003c\/summary\u003e\n\u003cul\u003e\n\u003cli\u003e225 B, 225 HBV\u003c\/li\u003e\n\u003cli\u003e356 BF, 356 BT\u003c\/li\u003e\n\u003cli\u003eK750\u003c\/li\u003e\n\u003cli\u003eK760\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCommon Jonsered Model References\u003c\/summary\u003e\n\u003cul\u003e\n\u003cli\u003eBC2125, BC2145, BC2235, BC2236, BC2255, BC2256\u003c\/li\u003e\n\u003cli\u003eCC2036, CC2145, CC2235, CC2236, CC2245\u003c\/li\u003e\n\u003cli\u003eCS2135 T, CS2139 T, CS2141, CS2145, CS2150, CS2152, CS2153\u003c\/li\u003e\n\u003cli\u003eCS2240, CS2240 S, CS2245, CS2245 S, CS2250 S\u003c\/li\u003e\n\u003cli\u003eCS2252, CS2253, CS2255, CS2258, CS2260, CS2260 WH\u003c\/li\u003e\n\u003cli\u003eCS350, CS390, CS410, CS450\u003c\/li\u003e\n\u003cli\u003eFC2145, FC2245, FC2255, FC2256\u003c\/li\u003e\n\u003cli\u003eGC2125, GC2236, GR2032, GR2036, GT2125\u003c\/li\u003e\n\u003cli\u003eMC2255, MC2256\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eQuick Model Search List\u003c\/summary\u003e\n\u003cp\u003eCommon model searches include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e135, 135E, 140, 140E, 223L, 223R, 225B, 225HBV, 232L, 232R\u003c\/li\u003e\n\u003cli\u003e235FR, 235R, 241R, 323L, 323R, 325L, 325RX, 326L, 326RX, 327RX\u003c\/li\u003e\n\u003cli\u003e333R, 335RX, 336FR, 343R, 345FX, 345RX, 355FX, 535RX, 545FX, 555FX\u003c\/li\u003e\n\u003cli\u003e334T, 338XPT, 340, 345, 346XP, 350, 353, 435, 440E, 445, 450\u003c\/li\u003e\n\u003cli\u003e455 Rancher, 460, 461, 545, 550XP, 555, 560XP, 562XP\u003c\/li\u003e\n\u003cli\u003eK750, K760\u003c\/li\u003e\n\u003cli\u003eCS2240, CS2245, CS2250, CS2252, CS2253, CS2255, CS2258, CS2260\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine OEM Husqvarna air purge bubble\u003c\/li\u003e\n\u003cli\u003ePart number 503936601\u003c\/li\u003e\n\u003cli\u003eAlso commonly called a primer bulb or purge bulb\u003c\/li\u003e\n\u003cli\u003eUsed on many select Husqvarna and Jonsered handheld equipment models\u003c\/li\u003e\n\u003cli\u003eHelps prime fuel through the carburetor fuel system\u003c\/li\u003e\n\u003cli\u003eFactory-correct replacement when listed in your parts diagram\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhen to Replace an Air Purge Bubble\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePrimer bulb is cracked, hard, leaking, or collapsed\u003c\/li\u003e\n\u003cli\u003eFuel will not pull into the purge bulb\u003c\/li\u003e\n\u003cli\u003eEquipment is hard to start after sitting\u003c\/li\u003e\n\u003cli\u003eBulb does not return to shape after pressing\u003c\/li\u003e\n\u003cli\u003eFuel lines are being replaced and the purge bulb is aged\u003c\/li\u003e\n\u003cli\u003eYour parts diagram lists Husqvarna 503936601\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eImportant Fitment Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThis listing is for Husqvarna part number 503936601\u003c\/li\u003e\n\u003cli\u003eFits select models only\u003c\/li\u003e\n\u003cli\u003eVerify the full model number, production date\/version, and parts diagram before ordering\u003c\/li\u003e\n\u003cli\u003eCheck carburetor style, fuel line routing, purge bulb shape, and mounting setup\u003c\/li\u003e\n\u003cli\u003eDo not order by model name alone because many models had multiple versions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003ePre-Purchase Checklist\u003c\/h2\u003e\n\u003cp\u003eBefore ordering Husqvarna 503936601, confirm:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYour full model number\u003c\/li\u003e\n\u003cli\u003eYour model year or production version\u003c\/li\u003e\n\u003cli\u003eYour parts diagram lists 503936601\u003c\/li\u003e\n\u003cli\u003eYour purge bulb shape and fuel line routing match the original\u003c\/li\u003e\n\u003cli\u003eYour fuel lines, fuel filter, carburetor, and tank grommet are inspected for wear or leaks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eInstallation and Service Notes\u003c\/h2\u003e\n\u003cp\u003eAir purge bubble replacement should be performed with the engine off, ignition disabled, and the equipment cool. Work in a clean, well-ventilated area and handle fuel safely.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTake a photo of the original fuel line routing before removal\u003c\/li\u003e\n\u003cli\u003eInspect fuel lines for cracking, stiffness, swelling, or leaks\u003c\/li\u003e\n\u003cli\u003eInspect the fuel filter and tank grommet while servicing the purge system\u003c\/li\u003e\n\u003cli\u003eInstall the purge bulb in the same orientation as the original\u003c\/li\u003e\n\u003cli\u003ePrime the fuel system and check for leaks before operation\u003c\/li\u003e\n\u003cli\u003eReplace damaged fuel lines or filters as needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003ePart Number \/ Search Terms\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHusqvarna 503936601\u003c\/li\u003e\n\u003cli\u003e503936601 air purge bubble\u003c\/li\u003e\n\u003cli\u003e503936601 primer bulb\u003c\/li\u003e\n\u003cli\u003e503936601 purge bulb\u003c\/li\u003e\n\u003cli\u003eHusqvarna air purge bubble\u003c\/li\u003e\n\u003cli\u003eHusqvarna primer bulb\u003c\/li\u003e\n\u003cli\u003eHusqvarna purge bulb\u003c\/li\u003e\n\u003cli\u003eHusqvarna fuel purge bulb\u003c\/li\u003e\n\u003cli\u003eHusqvarna carburetor purge bubble\u003c\/li\u003e\n\u003cli\u003eJonsered primer bulb\u003c\/li\u003e\n\u003cli\u003eJonsered purge bulb\u003c\/li\u003e\n\u003cli\u003eOEM Husqvarna primer bulb\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is Husqvarna 503936601?\u003c\/summary\u003e\n\u003cp\u003eHusqvarna 503936601 is a genuine OEM air purge bubble, also commonly called a primer bulb or purge bulb.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does an air purge bubble do?\u003c\/summary\u003e\n\u003cp\u003eThe purge bubble helps move fuel through the carburetor fuel system for easier starting on compatible handheld equipment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this fit every Husqvarna model listed by name?\u003c\/summary\u003e\n\u003cp\u003eNo. Many Husqvarna models were made in multiple versions. Always verify your exact model, production date, carburetor setup, and parts diagram before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eShould I replace fuel lines with the purge bulb?\u003c\/summary\u003e\n\u003cp\u003eInspect the fuel lines, fuel filter, and tank grommet during replacement. Replace any line that is cracked, stiff, swollen, or leaking.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003chr\u003e\n\u003cp\u003eP\u0026amp;P Small Engines stocks genuine Husqvarna primer bulbs, fuel lines, fuel filters, carburetor parts, spark plugs, air filters, chainsaw parts, trimmer parts, and OEM replacement parts for handheld outdoor power equipment.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Husqvarna","offers":[{"title":"Default Title","offer_id":50440470331585,"sku":"503936601","price":8.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2803\/7330\/files\/503936601airpurgebubblehusqvarnagenuineoempart-nwm__91387.jpg?v=1785247929","url":"https:\/\/pandpsmallengines.com\/products\/husqvarna-503936601","provider":"P \u0026 P Small Engines","version":"1.0","type":"link"}