{"product_id":"otc-compression-tester-kit-5606-dual-scale-2-5-gauge-5-adapters-2-flexible-hoses-in-case","title":"OTC Compression Tester Kit 5606 — Dual-Scale 2.5\" Gauge, 5 Adapters \u0026 2 Flexible Hoses in Case","description":"\u003cp\u003e\u003cstrong\u003eThe OTC 5606 Compression Tester Kit is a professional-grade dual-scale gauge set with multiple adapters and flexible hoses for fast, accurate gasoline engine compression checks.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact kit gathers everything a technician or serious DIYer needs to measure cylinder compression on cars, motorcycles, marine engines, and small engines. Built around a 2-1\/2 inch dual-scale (0–300 psi \/ 0–2100 kPa) gauge, the set combines long and short flexible hoses, five thread adapters that fit flat and tapered plugs, and a rugged blow-molded case to keep parts organized and protected.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the OTC 5606 help diagnose engine performance?\u003c\/h3\u003e\n\u003cp\u003eThe kit lets you quickly compare cylinder pressures to manufacturer specifications, revealing issues such as worn rings, leaking valves, or head gasket problems without disassembling the engine. With its dual-scale gauge and zero-adjust feature, readings are clear and repeatable.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDual-scale 2-1\/2\" gauge reads 0–300 psi and 0–2100 kPa for broad compatibility.\u003c\/li\u003e\n  \u003cli\u003eZero-adjust feature ensures accurate baseline before each test.\u003c\/li\u003e\n  \u003cli\u003eAdapters fit both flat and tapered spark plug or injector seats for most gasoline engines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat adapters and hoses are included, and why they matter?\u003c\/h3\u003e\n\u003cp\u003eThe kit contains five thread adapters (10mm, 12mm, 14mm standard, 14mm long reach, and 18mm) plus two hose assemblies (12\" flex and an extra-long 25\" flex hose with quick coupler). This range covers domestic and import cars, motorcycles, marine units, and many small engines, so you can reach awkward spark plug locations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e12\" and 25\" flexible hoses let you access tight engine bays and long-reach plugs.\u003c\/li\u003e\n  \u003cli\u003eQuick coupler on the 25\" hose speeds connection and disconnection during testing.\u003c\/li\u003e\n  \u003cli\u003eAdapters work on flat and tapered seats to reduce the need for adapters from other kits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and portable is the kit for shop or field use?\u003c\/h3\u003e\n\u003cp\u003eOTC designed this set for regular service use: nickel-plated fittings resist corrosion, the gauge has a protective rubber outer boot and chrome bezel, and all pieces stow in a blow-molded hard case with a removable lid. The case protects components and makes it easy to carry between jobs or store on a shelf.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCorrosion-resistant nickel-plated metal parts for long service life.\u003c\/li\u003e\n  \u003cli\u003eProtective gauge boot and chrome bezel reduce damage risk in busy shops.\u003c\/li\u003e\n  \u003cli\u003eBlow-molded case keeps adapters, hoses, and replacement parts organized.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do you get accurate readings in cluttered engine compartments?\u003c\/h3\u003e\n\u003cp\u003eThe included 25\" flex hose with a quick coupler positions the gauge where you can read it without awkward bending or obstructed views. The long hose plus a clear dual-scale dial improves safety and efficiency when diagnosing engines in confined or messy bays.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e25\" hose allows the gauge to sit outside crowded engine areas for easy reading.\u003c\/li\u003e\n  \u003cli\u003eQuick coupler prevents pressure loss during connection and disconnection.\u003c\/li\u003e\n  \u003cli\u003eLarge 2-1\/2\" dial provides legible numbers and fast comparisons between cylinders.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The OTC 5606 is aimed at professional technicians, mobile mechanics, and committed DIY enthusiasts who need a portable, complete compression-testing solution for gasoline engines. It suits people who service a variety of vehicles and engines and want a reliable kit that reduces adapter hunting and speeds diagnostic work while protecting tools between jobs.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will the adapters fit my motorcycle spark plug?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit includes 10mm, 12mm, 14mm (standard and long reach) and 18mm adapters that cover most motorcycle spark plug threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this gauge measure both psi and kPa?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 2-1\/2\" dial displays 0–300 psi and 0–2100 kPa on a dual scale for easy interpretation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"OTC","offers":[{"title":"Default Title","offer_id":55170619343191,"sku":"B000R5CPAQ","price":147.05,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/otc-5606-front-packaging.jpg?v=1790431940","url":"https:\/\/britishgarage.co.uk\/products\/otc-compression-tester-kit-5606-dual-scale-2-5-gauge-5-adapters-2-flexible-hoses-in-case","provider":"British Garage","version":"1.0","type":"link"}