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Two rectangular foam air filters in white packaging

LAHDEK

LAHDEK 2-pack Air Filter 491588S 399959 Quantum 625 650 675 Model 12

SKU CH-TT39-3EQ2X

Two-pack air filter replaces Briggs & Stratton parts 491588S, 491588 and 399959 on Quantum 625, 650, 675 and Model 12 engines

  • Compatible with Quantum 625 650 675 engines
  • Replaces part numbers 491588S 491588 399959
  • Two filters included for extended maintenance intervals
  • Designed for Briggs & Stratton Model 12 series
  • Suitable for horizontal crank generator and mixer engines

Two-Pack Replacement Filters for Briggs & Stratton

This twin-pack supplies direct replacements for Briggs & Stratton part numbers 491588S, 491588 and 399959. It fits Quantum Series 625, 650 and 675 engines as well as Model 12 side-valve units. The pair covers routine changes on mowers and some horizontal-crank equipment such as generators or cement mixers.

Petrol Engine Air Filtration

The filters clean intake air on small four-stroke petrol engines, preventing dust from accelerating cylinder wear. Normal use on lawn mowers or stationary equipment follows the engine maker’s service schedule; no extra power draw or noise is introduced by the filter itself. Replacement restores original airflow resistance when the element becomes clogged.

Pleated Paper Media in OEM-Style Housings

Each element uses a pleated paper cartridge sealed in a rigid frame that matches the original housing dimensions. The design allows the filter to seat in the engine’s existing cover without clips, screws or adhesive. Having two units on hand lets the operator rotate a clean filter in while the dirty one is inspected or discarded.

Highlights

  • Compatible with Quantum 625 650 675 engines
  • Replaces part numbers 491588S 491588 399959
  • Two filters included for extended maintenance intervals
  • Designed for Briggs & Stratton Model 12 series
  • Suitable for horizontal crank generator and mixer engines

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the LAHDEK air filter on a Quantum 625 engine, and what step is often missed?

Remove the cover, discard the old filter, seat the new filter with the pleats facing outward, then refit the cover — the step often missed is ensuring the seal sits flat in the groove before tightening the cover.

What maintenance will the LAHDEK 491588S filter need after installation?

Inspect the pleats every 25 operating hours; tap out loose debris and replace the filter once the media is darkened or torn — no cleaning fluid is recommended for this paper element.

What limit appears first when the mower runs continuously with this filter?

Airflow restriction builds as the pleats load with dust, causing the engine to run rich and lose power before the filter itself fails.

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