Briggs & Stratton 797503 Metal Intake Manifold (Upgraded Replacement) Upgrade your engine with the Briggs & Stratton 797503 metal intake manifold, a durable solution designed to replace the commonly failing plastic intake manifolds that use red o-ring seals (OEM part number 591784). Many Briggs V-Twin engines equipped with dual-barrel carburetors were originally fitted with plastic intake manifolds that rely on red o-ring seals. Over time, not only can these o-rings deteriorate, but the plastic intake itself can warp or develop cracks at the molded seams, creating vacuum leaks that affect engine performance. The 797503 metal intake has been tested and proven to work as a reliable replacement, eliminating these common failure points and providing a long-term solution. Why Upgrade to the Metal Intake? ✔ Proven replacement design for plastic intakes with red o-rings (591784)✔ Metal construction resists warping and cracking at molded seams✔ Eliminates vacuum leaks caused by o-ring failure and intake distortion✔ OEM Briggs & Stratton quality – designed for proper fit and function Common Failure Symptoms If your engine is experiencing: Rough or surging idle Difficulty starting Lean running or backfiring Loss of power Known issues with the red o-ring intake (591784) …it may be time to upgrade to this improved design. Fitment Notes Fits select Briggs & Stratton V-Twin engines with dual-barrel carburetors Common upgrade from plastic intake manifolds using red o-ring seal design (591784) Always verify your engine model for proper fitment When to Choose This vs. Updated OEM Intake Choose the metal intake (797503) if you want:✔ Maximum long-term durability✔ A proven upgrade over plastic intake designs✔ Elimination of both o-ring failure and intake warping/cracking issues Consider the updated OEM intake (595606) if you prefer:✔ Factory-correct replacement✔ Updated plastic design with improved green o-ring seals✔ Direct OEM replacement with no design changes
