{"product_id":"100tech-marine-fuel-sending-unit-float-replacement-17in-durable-reed","title":"100TECH Marine Fuel Sending Unit Float Replacement 17in - Durable Reed","description":"\u003cp\u003eIn this review of the 100TECH 17in fuel sending unit, the bottom line is simple: this is a practical, heavy duty replacement for owners who need a reliable tank level sender for boats, RVs or vehicles. The unit's biggest selling point is its reed switch design made with OKI components from Japan, which eliminates the fragile moving parts found on conventional swim arm senders. Installation is straightforward and the gauge output uses the American standard 240-33 ohms, making it a direct swap for many existing gauges.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eOKI Reed Switch:\u003c\/strong\u003e Uses an imported reed switch for greater durability and reliability compared with thick-film swim arm type senders.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003e240-33 ohm Output:\u003c\/strong\u003e American standard resistance range allows direct compatibility with most fuel and water gauges without recalibration.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003e316 Stainless Steel Construction:\u003c\/strong\u003e Heavy duty materials and rugged construction resist corrosion in marine environments.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eEasy to Install:\u003c\/strong\u003e Ships with a gasket, mounting screws and clear illustrated instructions to simplify replacement in existing SAE 5 hole patterns.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eFloat Size and Fit Guidance:\u003c\/strong\u003e 1.38in float diameter and recommended 1.50in hole if drilling, helping installers plan tank access accurately.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eSupport and Warranty:\u003c\/strong\u003e Backed by a 1 year limited warranty and free lifetime technical support for troubleshooting and fit questions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis sending unit is best for boat owners, RV enthusiasts and vehicle owners replacing an arm type sender who want a durable, low-maintenance sensor. It is particularly suited to marine environments where stainless steel and reed switch reliability matter, and for users who need the American standard 240-33 ohm output for direct gauge compatibility.\u003c\/p\u003e\n\u003cp\u003eIt is less appropriate for someone who needs a custom length outside the offered range without contacting the seller, or for installations where the float could contact internal tank fittings or the bottom without modifying tank depth; the product instructions advise measuring from the top of the tank and subtracting 1 inch to prevent bottom hits.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eDurable OKI reed switch design reduces moving parts that typically fail in swim arm senders.\u003c\/li\u003e\n \u003cli\u003eSolid 316 stainless steel construction and SAE 5 hole mounting for reliable marine use.\u003c\/li\u003e\n \u003cli\u003eEasy installation with gasket, screws and clear wiring instructions accepted by customers as straightforward.\u003c\/li\u003e\n \u003cli\u003eAccurate, repeatable 240-33 ohm output praised for good fit and accuracy on common tank sizes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eLength options are limited to standard sizes; customers needing nonstandard lengths must contact the seller.\u003c\/li\u003e\n \u003cli\u003eThe float diameter requires a 1.50in hole if drilling, which may need additional tank modification on some installs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003e100TECH\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e17in (430mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eOutput Resistance\u003c\/td\u003e\n\u003ctd\u003e240-33 ohms (240 empty, 33 full)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eFloat Diameter\u003c\/td\u003e\n\u003ctd\u003e1.38in (35mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eRecommended Hole if Drilling\u003c\/td\u003e\n\u003ctd\u003e1.50in (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\u003e316 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 100TECH 17in fuel sending unit is a smart, value-oriented replacement for anyone swapping an arm type sender in a boat, RV or vehicle. Its OKI reed switch and 316 stainless steel build deliver dependable operation and fewer failures, while the standard 240-33 ohm output ensures gauge compatibility. For installers willing to verify tank depth and fit, this unit offers reliable readings, solid build quality and good support, making it a practical buy for routine replacements.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this work with my 240-33 ohm gauge?\u003c\/strong\u003e\u003cbr\u003eYes, the sender uses the American standard 240-33 ohm output and is designed to be directly compatible with gauges using that range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I cut the sender to a shorter length?\u003c\/strong\u003e\u003cbr\u003eThe listing notes standard lengths; contact the seller for custom lengths rather than cutting, to preserve calibration and warranty.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat size hole do I need if I must drill?\u003c\/strong\u003e\u003cbr\u003eIf drilling a new access point, a 1.50in (38mm) hole is recommended to accommodate the float and mount.\u003c\/p\u003e","brand":"100TECH","offers":[{"title":"Default Title","offer_id":48253526900955,"sku":"B098MHYYF5","price":70.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51vZF89ZMQS._AC_SL1001_6563a023-dd40-4bb8-8565-de89309282eb.jpg?v=1778241735","url":"https:\/\/gearmusthave.com\/products\/100tech-marine-fuel-sending-unit-float-replacement-17in-durable-reed","provider":"GearMustHave","version":"1.0","type":"link"}