Briggs & Stratton 715208 lawn mower starter motor | 12V 15-tooth | single-cylinder air-cooled

12V replacement starter motor reference for Briggs & Stratton Vanguard single-cylinder air-cooled OHV engines. Briggs & Stratton identifies 715208 as a starter motor, and major aftermarket catalogs cross-reference it to Lester 5821, Arrowhead SBS0043, WAI 5821N and other equivalent part numbers for lawn tractors, commercial mowers, and generators.

OEM and Search References

• Primary reference: 715208 (Briggs & Stratton)
• Substitute reference: Lester 5821; Arrowhead SBS0043; J&N 410-22036 / 410-22054; WAI 5821N; AS-PL UD13680S; Cargo 115469; Bosch F032115469; Wilson 91-35-1033; PSH 400.412.152.200; Sando 6038154.0; Woodauto STR88012; TIANGUAN STG51517
• Equipment reference: Briggs & Stratton Vanguard series single-cylinder air-cooled OHV engines 235432 / 235436 / 235437, 245430 / 245432 / 245435 / 245436 / 245437, 246435, 247432 / 247437 (approx. 2000–2010); lawn tractors, commercial mowers, generators and other outdoor power equipment.
• Buyer search terms: Briggs & Stratton 715208 starter motor, 715208 starter, Vanguard starter motor, 15 tooth starter drive, 12V lawn tractor starter, PMDD starter motor, outdoor power equipment replacement parts.

Reference Specifications

• System voltage: 12V, as stated in the product title.
• Power: 0.7 kW, reported by compatible replacement listings cross-referenced to 715208.
• Pinion: 15 teeth, reported by compatible replacement listings cross-referenced to 715208.
• Pinion outer diameter: 38 mm (1.496 in); mounting: two ears — one 8.2 mm plain hole and one 8.2 × 8.9 mm slotted hole (allows fine adjustment of pinion-to-flywheel clearance); flange diameter: 55 mm; type: PMDD permanent-magnet direct drive, approx. 2.24 kg.
• Rotation: counterclockwise (CCW, viewed from the pinion end), reported by compatible replacement listings cross-referenced to 715208.
• These pinion, rotation, and mounting details are not confirmed Briggs & Stratton factory specifications. Match them against the removed unit before ordering.

Fitment and Purchase Checks

• Catalog-listed equipment: Briggs & Stratton Vanguard 235432 / 2454xx / 2474xx series engines listed above. Confirm engine model and spec number, existing starter number, voltage, pinion tooth count, rotation, mounting hole pattern (one plain hole plus one slotted hole), terminal layout, and physical dimensions before purchase. Exact 715208 length, width, and height have not been verified and are omitted.

For Agricultural Buyers and Distributors

• This listing is organized for outdoor power equipment procurement teams, repair shops, and parts distributors searching by equipment model and OEM reference. For  quotation, specify the engine model, old-part number, required quantity, and destination. Confirm price, stock, package quantity, and delivery terms with the seller before placing a purchase order.

Product Positioning

Briggs & Stratton Vanguard single-cylinder engines (235432 / 2454xx / 2474xx series, approx. 392 cc) power a huge installed base of lawn tractors, commercial walk-behind mowers and generators built roughly between 2000 and 2010, and the starter is among the first electrical parts to wear out on machines that start and stop dozens of times per session. When it fails, the machine sits idle while the owner sorts through look-alike numbers. This starter reproduces the original 15-tooth pinion, two-ear mounting pattern and terminal position exactly, so a workshop replaces the unit as a whole and moves on. For parts distributors, it fills steady replacement demand across a broad, aging installed base, and stocking it covers the Vanguard single-cylinder range with one SKU.

How It Works: Power and Engagement

The unit is a permanent-magnet direct-drive (PMDD) design: a copper-wound armature spins inside a ring of ferrite magnets, and the 15-tooth pinion is fixed directly to the armature shaft, so cranking response is immediate when current flows. Turning the key energizes the solenoid first, sliding the pinion into mesh with the flywheel ring gear before the main contacts close and apply full battery voltage - the two-step sequence that prevents tooth-on-tooth grinding. Rotation is counter-clockwise viewed from the pinion end, matching the Vanguard flywheel. The two-ear mount - one plain 8.2 mm hole plus one 8.2 x 8.9 mm slotted hole - holds the pinion-to-ring-gear clearance exactly as the factory unit did, and the slotted ear lets you fine-tune that clearance at installation.

Materials and Durability

• Pinion: hardened steel with a ground tooth profile, resisting the tooth-thinning wear common on high-hour starters.
• Windings: copper wire for low resistance and good heat rejection during repeated start cycles.
• Magnets: ferrite field magnets, stable at under-hood temperatures and resistant to demagnetization.
• Brushes and commutator: sized for long service life inside a dust-tight brush holder that keeps grass grit away from the contact area.
• Housing: coated shell that withstands rain, grass debris, and the wash-down exposure typical of outdoor power equipment service.

Problems It Solves

Vanguard-powered machines usually arrive at the shop with one of four complaints. First, slow cranking that worsens when the engine is hot, caused by weak brush contact or dragging magnets inside the worn original. Second, a grinding or slipping noise from pinion teeth that no longer mesh fully with the ring gear. Third, intermittent no-start from arced or contaminated commutator surfaces. Fourth, a single click with no cranking from burned solenoid contacts. Replacing the complete starter clears all four in one step instead of chasing parts inside a worn unit. One caution before ordering: count the teeth on the removed pinion (15 on this unit) and check the mounting pattern before you buy, because several Vanguard starter variants look alike but do not interchange.

Replacement Value for Shops and Distributors

For repair shops, one correctly matched starter returns the machine to work the same day, with no drilling, tapping, or wiring changes in between. For dealers and distributors, the numbers work: 50-unit minimum order, 7-30 day lead time, 12-month warranty, and unit pricing well below OEM supply channels, leaving room for margin at a competitive shelf price. Production follows ISO 9001, IATF 16949, and CE practices, and consistent cross-references to Lester 5821, Arrowhead SBS0043, and J&N 410-22036 keep ordering by catalog number straightforward and returns low.