{"product_id":"240-33-ohms-4ft-fuel-tank-sending-unit-durable-doughnut-float-sender","title":"240-33 ohms 4ft Fuel Tank Sending Unit - Durable Doughnut Float Sender","description":"\u003cp\u003eOur review of the 240-33 ohms 4' Fuel Tank Sending Unit finds it ideal for boat, RV and truck owners who need a rugged replacement sender that pairs with non-linear gauges. The standout reason to buy is durability: its doughnut float and reed-switch resistor array eliminate fragile swim-arm pivots and reduce mechanical failure points, so it tends to keep giving steady readings over time. Installation is straightforward with the included gasket and screws, and it is built for marine use with SUS 316 stainless mounting hardware.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoughnut float design:\u003c\/strong\u003e Provides a compact, sealed float that resists sticking and reduces moving part failures for longer service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReed switch construction:\u003c\/strong\u003e Uses multiple reed switches and fixed resistors for a reliable non-linear signal that matches standard non-linear gauges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-grade hardware:\u003c\/strong\u003e SAE 5-hole pattern and SUS 316 stainless steel components resist corrosion in boat and marine environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete installation kit:\u003c\/strong\u003e Ships with gasket, mounting screws and illustrated instructions to make a typical installation take about 15 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile compatibility:\u003c\/strong\u003e Works as a fuel or water tank sender for boats, RVs, trucks and cars when paired with a compatible gauge.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis sender is aimed at owners of boats, campers and trucks who need a durable, corrosion-resistant replacement for a failed or missing tank level sender and who already have-or plan to install-a compatible non-linear fuel gauge. It is particularly useful where a sealed float and minimal mechanical linkages are desired due to vibration or rough conditions.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include owners who require a linear-output sender for a specific gauge type, or anyone whose tank depth or mounting pattern differs significantly from the SAE 5-hole layout; careful measuring of tank depth and hole diameter is required before purchase.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRobust doughnut float and reed-switch array reduce mechanical failure risk.\u003c\/li\u003e\n\u003cli\u003eMarine-grade SUS 316 mounting hardware improves long-term corrosion resistance.\u003c\/li\u003e\n\u003cli\u003eEasy to install with included gasket, screws and clear wiring instructions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eNon-linear output means it must be matched with a compatible non-linear gauge; not suitable for linear-only systems.\u003c\/li\u003e\n\u003cli\u003eSome users report occasional misalignment of mounting screw holes on certain tanks, requiring careful test-fit.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Output\u003c\/td\u003e\n\u003ctd\u003e240 ohms - 33 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFloat Diameter\u003c\/td\u003e\n\u003ctd\u003e1.38' (35mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended hole if drilling\u003c\/td\u003e\n\u003ctd\u003e1-1\/2' (38mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Pattern\u003c\/td\u003e\n\u003ctd\u003eSAE 5-hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eSUS 316 stainless steel mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation kit\u003c\/td\u003e\n\u003ctd\u003eGasket and mounting screws included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe 240-33 ohms 4' Fuel Tank Sending Unit is a practical, well-built replacement sender for marine and vehicle applications where a non-linear gauge is used. Its doughnut float and reed-switch construction deliver steady, low-maintenance readings and the SUS 316 hardware suits corrosive environments. It offers strong value for owners needing durability and straightforward installation, provided they confirm gauge compatibility and tank dimensions first.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill this work with my existing fuel gauge?\u003c\/strong\u003e\u003cbr\u003eIt will work with gauges that accept a non-linear 240-33 ohm signal; confirm your gauge type before buying.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow deep can my tank be for this sender?\u003c\/strong\u003e\u003cbr\u003eThe sender length should be about 1' less than tank depth for plastic tanks and 0.5' less for metal tanks to avoid hitting the bottom.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to drill a hole to install?\u003c\/strong\u003e\u003cbr\u003eIf your tank lacks a suitable opening, a 1-1\/2' (38mm) hole is recommended for this unit.\u003c\/p\u003e","brand":"AODITECK","offers":[{"title":"Default Title","offer_id":48744364540123,"sku":"B08RBN9Q4Q","price":39.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51ZZVzgSRbL._AC_SL1000_cc4c1645-f30f-4459-8d31-041fd7d2ed8d.jpg?v=1778832996","url":"https:\/\/gearmusthave.com\/products\/240-33-ohms-4ft-fuel-tank-sending-unit-durable-doughnut-float-sender","provider":"GearMustHave","version":"1.0","type":"link"}