{"product_id":"aaa-3700-psi-2-5-gpm-replacement-pressure-washer-pump-kit-horizontal-shaft-brass-manifold","title":"AAA 3700 PSI 2.5 GPM Replacement Pressure Washer Pump Kit — Horizontal Shaft, Brass Manifold","description":"\u003cstrong\u003eAAA 90037 is a heavy-duty triplex replacement pump kit that restores pressure washer power—delivering up to 3700 PSI at 2.5 GPM for horizontal-shaft gas engines.\u003c\/strong\u003e\n\u003cp\u003eThis pump kit is engineered to revive tired or underperforming gas-powered pressure washers without replacing the whole machine. Built with a brass manifold, stainless-steel unloader, and oversized dual bearings, the AAA 90037 offers durable components, visible oil monitoring through a sight glass, and compatibility with many common horizontal-engine setups such as the Honda GX200. The kit includes the pump, siphon tube with filter, mounting bolts, shaft key, and clear instructions to simplify the swap.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this pump improve cleaning performance?\u003c\/h3\u003e\n\u003cp\u003eThe AAA 90037 uses a triplex design and PowerBoost Technology to send more pressure to the nozzle, helping you finish jobs faster and with fewer passes. The integrated stainless-steel unloader supports easier starts and consistent pressure under load.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDelivers up to 3700 PSI at 2.5 GPM for stronger spray force\u003c\/li\u003e\n  \u003cli\u003ePowerBoost increases nozzle pressure for tougher stains\u003c\/li\u003e\n  \u003cli\u003eStainless-steel unloader enables smooth, no-burst starts\u003c\/li\u003e\n  \u003cli\u003eDual oversized ball bearings reduce friction and wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill the AAA 90037 fit my pressure washer and how easy is installation?\u003c\/h3\u003e\n\u003cp\u003eThis replacement is designed for horizontal engines with a 3\/4\" diameter shaft and an SAE bolt pattern; matching your current pump’s inlet\/outlet orientation, shaft size, PSI and GPM rating ensures proper fit. The kit’s garden-hose inlet and M22 high-pressure outlet match common accessory standards to make hookup straightforward.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits horizontal engines with 3\/4\" shafts (e.g., Honda GX200) when orientation matches\u003c\/li\u003e\n  \u003cli\u003eSAE bolt pattern for direct mounting on many gas units\u003c\/li\u003e\n  \u003cli\u003eM22 threaded high-pressure outlet for standard hoses and wands\u003c\/li\u003e\n  \u003cli\u003eIncluded hardware: siphon tube, filter, mounting bolts, shaft key, instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat features help with longevity and maintenance?\u003c\/h3\u003e\n\u003cp\u003eMaintenance is simplified by a visible sight glass and advanced oil seals that eliminate the need for a dipstick and let you spot water contamination or low oil quickly. Thermal relief protection and quality metal components reduce overheating risk and mechanical wear, extending pump life under regular use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSight glass shows oil level and clarity without removing fill caps\u003c\/li\u003e\n  \u003cli\u003eAdvanced oil seals reduce leaks and contamination\u003c\/li\u003e\n  \u003cli\u003eThermal relief valve prevents damage from trapped heat\u003c\/li\u003e\n  \u003cli\u003eRobust brass manifold and metal internals for higher durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat tasks is this pump best suited for?\u003c\/h3\u003e\n\u003cp\u003eThe 3700 PSI at 2.5 GPM output suits a broad range of residential and light-commercial cleaning jobs, from concrete and siding to vehicles and fleet equipment. PowerBoost lets you dial in pressure to match surfaces, while the durable build manages repeated daily use on job sites or weekend projects.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConcrete driveways, sidewalks, and patios\u003c\/li\u003e\n  \u003cli\u003eHouse siding, decks, fences, and exterior walls\u003c\/li\u003e\n  \u003cli\u003eAutomotive, trucks, and fleet washing\u003c\/li\u003e\n  \u003cli\u003eGeneral property maintenance for homeowners and pros\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis AAA replacement pump kit is for owners of gas-powered pressure washers who want to restore output without buying a new machine. If your unit uses a horizontal engine with a 3\/4\" shaft, you need reliable metal construction, visible oil monitoring, and a straightforward install, the AAA 90037 is a practical, cost-effective choice. Always verify inlet\/outlet orientation, shaft diameter, PSI and GPM compatibility before ordering.\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: Does this pump fit a Honda GX200 engine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the AAA 90037 fits horizontal engines with a 3\/4\" shaft like the Honda GX200 when inlet\/outlet orientation matches.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What comes in the replacement pump kit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The kit includes the pump, siphon tube with filter, mounting bolts, shaft key, and installation instructions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AAA","offers":[{"title":"Default Title","offer_id":56801848820052,"sku":"B00TQLMNMC","price":372.66,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/aaa-90037-front-assembly.jpg?v=1786751182","url":"https:\/\/gardenluxe.co.uk\/products\/aaa-3700-psi-2-5-gpm-replacement-pressure-washer-pump-kit-horizontal-shaft-brass-manifold","provider":"Gardenluxe Uk","version":"1.0","type":"link"}