{"product_id":"sierra-marine-18-99524-gearcase-filler-3-gallon","title":"Sierra Marine 18-99524 3-Gallon Gearcase Lower Unit Lube Filler","description":"\u003cp class=\"nvn-hero\"\u003eThis Sierra Marine gearcase filler is the clean way to change lower unit gear oil. It's a three gallon tank with a threaded nozzle that pushes fresh lube up from the bottom drain, so you fill the gearcase completely and drive the air out the top. Tear-drop base with a drip tray keeps it from tipping and catches the mess.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eChanging the gear oil in an outboard's lower unit is one of those jobs that's simple in theory and messy in practice. This Sierra Marine gearcase filler takes the mess out of it. It's a three gallon tank with a threaded nozzle that pushes fresh gear lube up into the lower unit from the bottom drain, which is exactly how the job is supposed to be done.\u003c\/p\u003e\n\u003cp\u003eHere's why that matters. Gear oil has to go in from the bottom so it fills the gearcase completely and drives the old air out the top vent. Pour it in from the top and you leave air pockets behind, and air pockets mean bare gears turning without a full film of oil. This filler threads right onto the fill hole and lets you meter the lube in steadily until it weeps out the vent screw. Then you cap both screws and you're done. A check valve venting system keeps the flow controlled so you're not fighting back-pressure or dribbling lube down the skeg.\u003c\/p\u003e\n\u003cp\u003eOne more reason to do it this way. When you drain the old oil first, you get a look at what comes out. Milky, coffee-colored lube means water's getting past a seal, and that's your early warning to pull the prop and check the seals before real damage sets in. So the fill job doubles as a quick health check on your lower unit. Fresh lube going in the bottom, and a good look at the old stuff coming out.\u003c\/p\u003e\n\u003cp\u003eThe tank itself is translucent plastic, so you can see how much lube you've got left at a glance. That's handy when you're partway through a fill and don't want to run the reservoir dry mid-job. The tear-drop shape sits on a wide drip tray base, and that base does two things. It resists tipping when you set it down on an uneven floor or a sloped trailer bunk, and it catches the drips that always seem to find their way off the nozzle. Anybody who's changed lower unit oil on a garage floor knows how welcome that tray is.\u003c\/p\u003e\n\u003cp\u003eThree gallons is a lot of gear lube. This isn't a squeeze bottle for a single seasonal change. It's built for volume, so a marina tech or a busy dealer can knock out a whole row of lower units before refilling the tank. If you're a hands-on owner with a couple of boats, or you help your buddies out every spring, the capacity earns its keep too. You fill the tank once and work through the whole list.\u003c\/p\u003e\n\u003cp\u003eIt ships with the E-Z Fill valve and the adapter kit, so you've got the fittings to thread onto most outboard lower units right out of the box. The threaded nozzle seats cleanly on the common fill and drain screw sizes used across the major outboard brands, both older two-strokes and newer four-strokes. Check your engine's fill screw before you start, snug the adapter hand-tight, and you're set. No need to chase down extra fittings for a standard job.\u003c\/p\u003e\n\u003cp\u003eA couple of honest notes. This is a bulk tool, not a pocket accessory. If you only change one lower unit a year, a small hand pump might be all you need, and that's a fair call. But if you're doing this work regularly, or you want the clean bottom-fill result without the mess, the three gallon setup is the way the pros do it. Treat the plastic kindly, store it out of a hot bilge, and keep the nozzle threads clean between jobs, and it'll serve you a long time.\u003c\/p\u003e\n\u003cp\u003eBottom line: it's a sturdy, straightforward tool that makes a routine but easy-to-botch job go right. Fill from the bottom, watch it come out the top, cap it up. That's the whole trick, and this tank makes it painless.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eThree gallon capacity, enough to fill a whole row of lower units before you refill the tank\u003c\/li\u003e\n  \u003cli\u003eThreaded bottom-fill nozzle drives out air pockets for a complete, void-free gearcase fill\u003c\/li\u003e\n  \u003cli\u003eCheck valve venting system keeps the flow controlled and back-pressure low\u003c\/li\u003e\n  \u003cli\u003eTear-drop base with a wide drip tray resists tipping and catches nozzle drips\u003c\/li\u003e\n  \u003cli\u003eTranslucent plastic tank lets you see the remaining lube level at a glance\u003c\/li\u003e\n  \u003cli\u003eShips with the 551-33CV E-Z Fill valve and 551-334K adapter kit, ready to use\u003c\/li\u003e\n  \u003cli\u003eAdapter kit seats on most outboard fill and drain screws, older two-strokes to modern four-strokes\u003c\/li\u003e\n  \u003cli\u003eBacked by Sierra Marine's limited two-year warranty\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 does this tool actually do?\u003c\/summary\u003e\n    \u003cp\u003eIt fills an outboard's lower unit, the gearcase, with fresh gear lube. You thread the nozzle onto the bottom fill hole and pump the oil up from the bottom until it comes out the top vent, which is the correct way to change lower unit oil.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhy fill from the bottom instead of pouring in from the top?\u003c\/summary\u003e\n    \u003cp\u003eFilling from the bottom drives the old air out the top vent screw so the gearcase ends up completely full. Top-pouring traps air pockets, and air pockets leave gears running without a full film of oil. Bottom-fill is how it's meant to be done.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow much gear lube does the tank hold?\u003c\/summary\u003e\n    \u003cp\u003eThree gallons. That's a bulk reservoir, so a shop or a busy owner can do several lower units before stopping to refill.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat comes in the box?\u003c\/summary\u003e\n    \u003cp\u003eThe tank ships with the 551-33CV E-Z Fill valve and the 551-334K adapter kit, so you've got the fittings to thread onto most outboard lower units right away.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it fit my outboard?\u003c\/summary\u003e\n    \u003cp\u003eThe included adapter kit seats on the common fill and drain screw sizes used across most popular outboards, both older two-strokes and newer four-strokes. Check the fill screw on your engine before you start and snug the adapter hand-tight.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this overkill if I only change my gear oil once a year?\u003c\/summary\u003e\n    \u003cp\u003eHonestly, maybe. Three gallons is built for volume, so it shines for marina techs, dealers, or anyone running a couple of boats. If you change one lower unit a year, a small hand pump will do the job. If you want the clean bottom-fill result without the mess, this is still the nicer way to do it.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes the tear-drop base really keep it from tipping?\u003c\/summary\u003e\n    \u003cp\u003eThe wide drip tray base gives it a low, stable footing that resists tipping on an uneven floor or a sloped trailer bunk, and the tray catches the drips that come off the nozzle. It's a genuinely useful design when you're working on a garage floor.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat gear lube should I use with it?\u003c\/summary\u003e\n    \u003cp\u003eUse the gear lube grade your engine manufacturer specifies for the lower unit. The filler handles standard marine gear oil, it doesn't change what type you should run.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know when the lower unit is full?\u003c\/summary\u003e\n    \u003cp\u003eKeep pumping lube in through the bottom fill hole until fresh oil weeps out of the top vent screw with no air. Then install and snug the vent screw first, then the fill screw, and wipe it down.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I check for problems while I'm changing the oil?\u003c\/summary\u003e\n    \u003cp\u003eYes, and you should. Drain the old oil first and look at it. Milky or coffee-colored lube means water is getting past a seal, which is your cue to pull the prop and inspect the seals before it turns into gear damage.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat's the warranty?\u003c\/summary\u003e\n    \u003cp\u003eIt carries Sierra Marine's limited two-year warranty. We're an authorized Sierra Marine reseller, so any warranty question runs through us.\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 Marine 18-99524 Gearcase Filler\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\u003e18-99524\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e808282394776\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eGearcase \/ Lower Unit Lube Filler\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e3 Gallon\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eTank Material\u003c\/th\u003e\n\u003ctd\u003eTranslucent Plastic\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDesign\u003c\/th\u003e\n\u003ctd\u003eTear-Drop with Drip Tray\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eVenting\u003c\/th\u003e\n\u003ctd\u003eCheck Valve Venting System\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFill Method\u003c\/th\u003e\n\u003ctd\u003eThreaded Bottom-Fill Nozzle\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eIncluded Components\u003c\/th\u003e\n\u003ctd\u003e551-33CV E-Z Fill Valve, 551-334K Adapter Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOutboard Compatibility\u003c\/th\u003e\n\u003ctd\u003eChrysler, Evinrude, Force, Johnson, Mariner, Mercury\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003eLimited 2-Year (Sierra Marine)\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 does this tool actually do?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It fills an outboard's lower unit, the gearcase, with fresh gear lube. You thread the nozzle onto the bottom fill hole and pump the oil up from the bottom until it comes out the top vent, which is the correct way to change lower unit oil.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Why fill from the bottom instead of pouring in from the top?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Filling from the bottom drives the old air out the top vent screw so the gearcase ends up completely full. Top-pouring traps air pockets, and air pockets leave gears running without a full film of oil. Bottom-fill is how it's meant to be done.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How much gear lube does the tank hold?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Three gallons. That's a bulk reservoir, so a shop or a busy owner can do several lower units before stopping to refill.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What comes in the box?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The tank ships with the 551-33CV E-Z Fill valve and the 551-334K adapter kit, so you've got the fittings to thread onto most outboard lower units right away.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will it fit my outboard?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The included adapter kit seats on the common fill and drain screw sizes used across most popular outboards, both older two-strokes and newer four-strokes. Check the fill screw on your engine before you start and snug the adapter hand-tight.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this overkill if I only change my gear oil once a year?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Honestly, maybe. Three gallons is built for volume, so it shines for marina techs, dealers, or anyone running a couple of boats. If you change one lower unit a year, a small hand pump will do the job. If you want the clean bottom-fill result without the mess, this is still the nicer way to do it.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does the tear-drop base really keep it from tipping?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The wide drip tray base gives it a low, stable footing that resists tipping on an uneven floor or a sloped trailer bunk, and the tray catches the drips that come off the nozzle. It's a genuinely useful design when you're working on a garage floor.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What gear lube should I use with it?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Use the gear lube grade your engine manufacturer specifies for the lower unit. The filler handles standard marine gear oil, it doesn't change what type you should run.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I know when the lower unit is full?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Keep pumping lube in through the bottom fill hole until fresh oil weeps out of the top vent screw with no air. Then install and snug the vent screw first, then the fill screw, and wipe it down.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I check for problems while I'm changing the oil?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes, and you should. Drain the old oil first and look at it. Milky or coffee-colored lube means water is getting past a seal, which is your cue to pull the prop and inspect the seals before it turns into gear damage.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What's the warranty?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It carries Sierra Marine's limited two-year warranty. We're an authorized Sierra Marine reseller, so any warranty question runs through us.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Sierra Marine","offers":[{"title":"Default Title","offer_id":45000692498525,"sku":"2007904","price":206.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_d48c8829-22cf-4f3b-b126-c34aa9abcf19.jpg?v=1788750466","url":"https:\/\/nvnmarine.com\/products\/sierra-marine-18-99524-gearcase-filler-3-gallon","provider":"NVN Marine","version":"1.0","type":"link"}