{"product_id":"sierra-exoflex-wet-exhaust-hose-1-1-2-in-16-254-1124","title":"Sierra 16-254-1124 EXOFLEX Wet Exhaust Hose 1-1\/2 in x 12-1\/2 in","description":"\u003cp class=\"nvn-hero\"\u003eThe Sierra EXOFLEX 16-254-1124 is a 1-1\/2 inch inside diameter wet exhaust hose cut to 12-1\/2 inches, built to SAE J2006 R2. You get an EPDM cover, synthetic plies, and a steel wire helix that keeps it from collapsing under suction. It's the right replacement for the short runs on a small inboard wet exhaust system.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eSierra built the EXOFLEX line for wet marine exhaust, where a hose has to shrug off hot exhaust gas, raw cooling water, and constant engine vibration all at once. This is the 1-1\/2 inch inside diameter version cut to a 12-1\/2 inch length, meant for the short sections between components on a small inboard wet exhaust system. If you're replacing a cracked or collapsed piece between your riser, muffler, or waterlift, this is the part that gets you back on the water.\u003c\/p\u003e\n\u003cp\u003eThe construction is what matters on a hose like this. You get an EPDM black cover over synthetic reinforcement plies, with a steel wire helix wound through the wall. That helix is the piece people overlook. Wet exhaust runs under suction as well as pressure, and without a wire helix a soft hose can pull flat and choke the flow. This one holds its round shape under vacuum, so your exhaust and cooling water keep moving the way the engine expects.\u003c\/p\u003e\n\u003cp\u003eIt's built to SAE J2006 R2, the recognized standard for marine wet exhaust hose. So you know it's rated for the job and not some general-purpose tubing pressed into service. Temperature range runs from -22 degrees Fahrenheit all the way to 212 degrees, with a 239 degree peak. That cold number isn't just a spec sheet flex. It means the hose stays flexible through winter layup instead of turning stiff and cracking when you splash in spring.\u003c\/p\u003e\n\u003cp\u003eOn pressure, you're looking at 60 psi working and 180 psi burst. For a wet exhaust that's plenty of headroom, since exhaust back-pressure lives far below that. The extra margin is why some folks reach for this hose on other demanding runs, like a pump-out line, where the pressure rating actually gets used. Just confirm your routing keeps it clear of chafe points before you commit.\u003c\/p\u003e\n\u003cp\u003eA few things we've learned installing these. First, measure twice. At 12-1\/2 inches this is a short section, and there isn't much slack to play with, so a sloppy cut or a fitting that's off by half an inch turns into a weep at the clamp. Second, respect the bend radius. The steel helix resists collapse, but crank it tighter than about four times the inside diameter and you'll kink it. On a 1-1\/2 inch hose that means keeping bends gentle, roughly six inches of radius or more. Third, clamp it right. We like 316 stainless T-bolt clamps here. Worm-drive clamps can back off under the constant vibration of a planing hull, and a loose exhaust clamp is not something you want to discover offshore.\u003c\/p\u003e\n\u003cp\u003eOne honest note on longevity. That black EPDM cover takes UV hard in an open, sun-exposed engine bay, and after a handful of seasons you may see surface cracking on the outer skin. It's cosmetic at first, but if your install leaves the hose exposed, a wrap of split loom buys you years. In a closed bilge or engine box it's a non-issue.\u003c\/p\u003e\n\u003cp\u003eWhere does a short section like this actually show up? Usually it's the jog between a mixing elbow and a waterlift muffler, or the run off the muffler to a transom fitting on a smaller inboard or sterndrive setup. Those spots see the worst of it, hot gas on one side, salt or fresh cooling water on the other, and enough vibration to work a weak hose loose over time. That's exactly the duty this hose is designed for, so it's a sensible part to keep on the shelf if you're the kind of owner who'd rather fix a suspect section at the dock than wait for it to fail on a run. If you're not sure which section on your engine takes this size, your engine manual's exhaust diagram will call out the inside diameter for each leg.\u003c\/p\u003e\n\u003cp\u003eThis is the 1-1\/2 inch inside diameter, 1-13\/16 inch outside diameter size, which fits the majority of small inboard wet exhaust setups. Check your existing hose or fitting OD before ordering, because a 1-5\/8 inch fitting is a common mismatch that leads to slippage no clamp can fully fix. Get the size right and this is a straightforward, standards-rated replacement that'll outlast the one you're pulling off.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e1-1\/2 inch inside diameter, 1-13\/16 inch outside diameter, sized for most small inboard wet exhaust runs\u003c\/li\u003e\n  \u003cli\u003e12-1\/2 inch cut length, ready for the short sections between riser, muffler, and waterlift\u003c\/li\u003e\n  \u003cli\u003eSteel wire helix through the wall resists collapse under suction so flow stays open\u003c\/li\u003e\n  \u003cli\u003eEPDM black cover over synthetic reinforcement plies stands up to hot exhaust gas and raw water\u003c\/li\u003e\n  \u003cli\u003eBuilt to SAE J2006 R2, the recognized standard for marine wet exhaust hose\u003c\/li\u003e\n  \u003cli\u003eTemperature range of -22 to 212 degrees Fahrenheit with a 239 degree peak, stays flexible through winter layup\u003c\/li\u003e\n  \u003cli\u003e60 psi working pressure and 180 psi burst rating give plenty of margin for exhaust and demanding pump-out runs\u003c\/li\u003e\n  \u003cli\u003eFlexible enough for gentle bends while the helix holds its round shape\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Sierra Marine reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the exact dimensions of this hose?\u003c\/summary\u003e\n    \u003cp\u003eIt's 1-1\/2 inches inside diameter, 1-13\/16 inches outside diameter, cut to a 12-1\/2 inch length. Check your existing hose or fitting OD before ordering so the size matches.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a true marine wet exhaust hose?\u003c\/summary\u003e\n    \u003cp\u003eYes. It's built to SAE J2006 R2, the standard for marine wet exhaust, so it's rated for hot exhaust gas and raw cooling water together, not general-purpose tubing.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat temperature can it handle?\u003c\/summary\u003e\n    \u003cp\u003eThe range runs from -22 to 212 degrees Fahrenheit, with a 239 degree Fahrenheit peak. The cold rating means it stays flexible through winter layup instead of stiffening and cracking.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it collapse under suction?\u003c\/summary\u003e\n    \u003cp\u003eNo. There's a steel wire helix wound through the wall that holds the hose round under vacuum, so your exhaust and cooling water keep flowing even where the run pulls suction.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat pressure is it rated for?\u003c\/summary\u003e\n    \u003cp\u003e60 psi working pressure and 180 psi burst. That's well above typical exhaust back-pressure, which is why some boaters also use it on demanding runs like a pump-out line.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow tight can I bend it during install?\u003c\/summary\u003e\n    \u003cp\u003eKeep your bends gentle. The helix resists collapse, but bending sharper than about four times the inside diameter can kink it, so aim for roughly six inches of bend radius or more on this 1-1\/2 inch hose.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat clamps should I use?\u003c\/summary\u003e\n    \u003cp\u003e316 stainless T-bolt clamps are the right call. Worm-drive clamps can loosen under the constant vibration of a planing hull, and a loose exhaust clamp is trouble.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill the black cover hold up to sun exposure?\u003c\/summary\u003e\n    \u003cp\u003eThe EPDM cover can show surface cracking after several seasons in a sun-exposed engine bay. If the hose sits in direct light, a wrap of split loom protects it. In a closed bilge or engine box it's a non-issue.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it need to be cut to fit?\u003c\/summary\u003e\n    \u003cp\u003eIt comes as a 12-1\/2 inch length. That's short, so measure carefully before trimming, since there isn't much slack and an off cut can weep at the clamp.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eSierra 16-254-1124 EXOFLEX Wet Exhaust Hose 1-1\/2 in x 12-1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSierra Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e16-254-1124\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e808282380199\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHose Inside Diameter\u003c\/th\u003e\n\u003ctd\u003e1-1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eHose Outside Diameter\u003c\/th\u003e\n\u003ctd\u003e1-13\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003ctd\u003e12-1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eStandard\u003c\/th\u003e\n\u003ctd\u003eSAE J2006 R2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCover Material\u003c\/th\u003e\n\u003ctd\u003eEPDM Black\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eReinforcement\u003c\/th\u003e\n\u003ctd\u003eSynthetic plies with steel wire helices\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eTemperature Range\u003c\/th\u003e\n\u003ctd\u003e-22 F to 212 F\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePeak Temperature\u003c\/th\u003e\n\u003ctd\u003e239 F\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWorking Pressure\u003c\/th\u003e\n\u003ctd\u003e60 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBurst Pressure\u003c\/th\u003e\n\u003ctd\u003e180 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eMarine wet exhaust hose\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What are the exact dimensions of this hose?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's 1-1\/2 inches inside diameter, 1-13\/16 inches outside diameter, cut to a 12-1\/2 inch length. Check your existing hose or fitting OD before ordering so the size matches.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this a true marine wet exhaust hose?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. It's built to SAE J2006 R2, the standard for marine wet exhaust, so it's rated for hot exhaust gas and raw cooling water together, not general-purpose tubing.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What temperature can it handle?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The range runs from -22 to 212 degrees Fahrenheit, with a 239 degree Fahrenheit peak. The cold rating means it stays flexible through winter layup instead of stiffening and cracking.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will it collapse under suction?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. There's a steel wire helix wound through the wall that holds the hose round under vacuum, so your exhaust and cooling water keep flowing even where the run pulls suction.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What pressure is it rated for?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"60 psi working pressure and 180 psi burst. That's well above typical exhaust back-pressure, which is why some boaters also use it on demanding runs like a pump-out line.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How tight can I bend it during install?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Keep your bends gentle. The helix resists collapse, but bending sharper than about four times the inside diameter can kink it, so aim for roughly six inches of bend radius or more on this 1-1\/2 inch hose.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What clamps should I use?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"316 stainless T-bolt clamps are the right call. Worm-drive clamps can loosen under the constant vibration of a planing hull, and a loose exhaust clamp is trouble.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will the black cover hold up to sun exposure?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The EPDM cover can show surface cracking after several seasons in a sun-exposed engine bay. If the hose sits in direct light, a wrap of split loom protects it. In a closed bilge or engine box it's a non-issue.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it need to be cut to fit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It comes as a 12-1\/2 inch length. That's short, so measure carefully before trimming, since there isn't much slack and an off cut can weep at the clamp.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Sierra Marine","offers":[{"title":"Default Title","offer_id":45056956792925,"sku":"2008308","price":145.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_41d3fd8b-1268-4acd-8eb7-56ae473a5d13.jpg?v=1789465769","url":"https:\/\/nvnmarine.com\/products\/sierra-exoflex-wet-exhaust-hose-1-1-2-in-16-254-1124","provider":"NVN Marine","version":"1.0","type":"link"}