# 84006638 - REGULATOR, VOLTAGE 33/40HP EFI - BRIGGS

84006638 - REGULATOR, VOLTAGE 33/40HP EFI - BRIGGS & STRATTON PARTS

Replacement voltage regulator/rectifier for select Vanguard 33/40hp EFI engines.  
  

**For use only after engine manufacture date code:  20101800**

 It is recommended to replace the capacitor at the same time # 847148 (Sold separately)

Fits Engines:

Briggs Vanguard 33hp EFI

Briggs Vanguard 40hp EFI

**Part Notes:**

**If your engine code is before 18021100 order rectifier 84002239**

**If your engine code is 18021100 to 20101800 order rectifier 848187**

## Details

- **Price:** 235.39 USD
- **Vendor:** BRIGGS & STRATTON
- **Tags:** Briggs & Stratton Engine Parts, OEM Parts

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 235.39 USD | In stock |

## Images

- 84006638 - REGULATOR, VOLTAGE 33/40HP EFI - BRIGGS
- 84006638 - REGULATOR, VOLTAGE 33/40HP EFI - BRIGGS

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> Source: [Doc's Full Bore Outdoor](https://parts.docsfullboreoutdoor.com/products/84006638)
> Updated: 2026-05-20