Briggs & Stratton Sump / Oil Pan Assemblies
Briggs & Stratton sump and oil pan assemblies seal the bottom of the crankcase, containing engine oil and housing internal components including the camshaft, governor gear, and oil pump. The engine sump features precision-machined surfaces with dowel pin holes for proper alignment and threaded mounting holes. Small engine oil pan gaskets create the seal between crankcase and sump, preventing oil leaks. The lawn mower engine sump includes the crankshaft seal at the bottom center where the PTO shaft exits. Most vertical shaft engines require complete engine removal to access sump mounting bolts. We hold Briggs & Stratton oil pan assemblies in stock and sell worldwide.
Available Briggs & Stratton Sump / Oil Pan Assemblies
Sump Engine
592849
Briggs & Stratton
£113.75
In Stock
Sump Engine
84007233
Briggs & Stratton
£91.50
Available
Sump Engine
697106
Briggs & Stratton
£220.75
Available
Oil Sump Plug (H420)
80140388
Briggs & Stratton
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Sump, Engine
84007551
Briggs & Stratton
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Sump, Engine
JUMPTO4
Briggs & Stratton
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Sump, Engine
295032
Briggs & Stratton
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Sump, Engine
84008140
Briggs & Stratton
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Oil Sump Plug (H224)
80140302
Briggs & Stratton
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Sump, Engine
391645
Briggs & Stratton
£99.00
Available
Sump, Engine
597301
Briggs & Stratton
£135.10
Available
Sump, Engine
491891
Briggs & Stratton
£108.45
Available
Frequently Asked Questions
Why do Briggs Intek V-twin engines repeatedly blow sump gaskets?
Design weakness allows gaskets to fail in the same location—directly below cylinder #2 between the cylinder bore and pushrod cavity. Excessive crankcase vacuum from restricted breathers sucks gaskets inward causing failure. Insufficient bolt torque in original factory specifications allowed gasket movement. Briggs addressed this by increasing torque specs from 200 to 325 inch-pounds and providing new bolts with pre-applied thread locker. Some mechanics successfully prevent failures by using RTV gasket sealer in addition to the paper gasket. Regular breather maintenance prevents vacuum-related failures.
What causes dowel pins to not align when reinstalling the sump?
Dowel pins ensure proper sump alignment but can bind if dirt or old gasket material obstructs holes. One pin aligning while the other is off by 1/16 inch or more indicates a bent pin, crankcase distortion, or incorrect sump for that engine model. Clean dowel pin holes thoroughly with a wire brush. Check that dowel pins aren't bent or proud of the crankcase surface. Ensure you're installing the correct sump—different engine series use similar but not interchangeable sumps. Work the sump gently side-to-side while applying light downward pressure to help pins find their holes. Never force installation as this damages aluminum castings.
How do you remove and replace a Briggs & Stratton oil pan?
Remove the engine completely from the equipment—you cannot access all sump bolts with the engine mounted. Drain all oil before starting. Remove PTO pulleys, electric clutch if equipped, and any components blocking access to mounting bolts. Remove the oil pump cover (typically three bolts) before removing sump bolts. Support the engine upside down on a stable surface, being careful not to set it on the flywheel fan which pushes the crankshaft up and prevents proper seating. Remove all sump bolts and gently tap or pry the sump loose using a plastic scraper. Clean mating surfaces thoroughly, removing all old gasket material without scratching aluminum.
What are the correct torque specifications for oil pan bolts?
Single-cylinder engines typically require 100-220 inch-pounds (8-18 ft-lbs) depending on model series. V-twin Intek engines originally specified 200 inch-pounds but Briggs updated specifications to 300-325 inch-pounds due to recurring gasket leak problems. Always torque bolts in a crisscross pattern starting from the center working outward to prevent warping. Tighten in stages—first pass to finger tight, second to half torque, final to specification. Use thread locker on bolts, typically blue Loctite for serviceability. Consult your specific engine service manual as torque specifications vary significantly between engine families.
Should you use gasket sealer on oil pan gaskets?
OEM Briggs gaskets typically install dry without sealer, but many mechanics apply thin coats of gasket sealer on both sides for insurance against leaks. Use high-tack gasket sealer or RTV sparingly—excess sealer squeezes into the crankcase causing potential oil passage blockage. On problematic Intek V-twin engines, using sealer significantly reduces repeat failures. If using sealer, allow 12 hours curing time before filling with oil and starting. Some gasket kits include multiple thickness gaskets—use the thickest standard gasket unless compensating for worn surfaces. Always replace the crankshaft seal when replacing sump gaskets.