# MK-104 - BRIGGS VANGUARD 33/40HP EFI ENGINE MAINTENANCE KIT (2022+)

MK-104 - BRIGGS VANGUARD 33/40HP EFI ENGINE MAINTENANCE KIT (2022+)

Engine maintenance kit for the Briggs & Stratton Vanguard v-twin fan-cooled EFI 33hp and 40hp engine with the fuel pump inside of the fuel tank.   
  
This kit won't work on Argo models 2019-2021, they use MK-103.  

  
Engine Info:  
  Capacity:  2.4 liters / 2.54 quarts (80 fl oz.) - w/ filter change  
  Oil Type:  Cold climate 5w-30 Full Synthetic    Warm climate: 15w-50 - Full Synthetic  
  Spark Plug Gap:  .03" / .76mm  
  
  
Argo Transmission Capacity/Type:  
  Admiral:  1.2 liters / 1.27 quarts (40.6 fl oz) - 75w-90 Full Synthetic GL5 rated.

  
Fits Argo XTV Models:

Aurora 850 8x8 (2022)  
Aurora 850 Huntmaster 8x8 (2022)  
Aurora 950 8x8 (2022+)  
Aurora 950 Bigfoot 8x8 (2022)  
Aurora 950 Huntmaster 8x8 (2020+)  
  
  
Kit Contains:  
  
(1) 692519  OEM MAIN FILTER  
(1) 692520  OEM PRE-FILTER  
(1) 842921  OEM OIL FILTER  
(2) CHAMPION XC92YC SPARK PLUGS  
  
  
Tech Tip:  
  
Always add a quality fuel stabilizer like [Sta-Bil 360 Marine](https://parts.docsfullboreoutdoor.com/collections/lubricants/products/22239) to all fuel being put into your tank to prevent ethanol gumming and varnish.  The #1 repair for dealerships is old fuel related issues.  Stabilizing your fuel can prevent most issues for up to 12 months.

## Details

- **Price:** 50.88 USD
- **Vendor:** BRIGGS & STRATTON
- **Tags:** Argo Parts, Briggs & Stratton Engine Parts, OEM Parts

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 50.88 USD | In stock |

## Images

- MK-104 - BRIGGS VANGUARD 33/40HP EFI ENGINE MAINTENANCE KIT (2022+)
- MK-104 - BRIGGS VANGUARD 33/40HP EFI ENGINE MAINTENANCE KIT (2022+)

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> Source: [Doc's Full Bore Outdoor](https://parts.docsfullboreoutdoor.com/products/mk-104-briggs-vanguard-33-40hp-efi-engine-maintenance-kit-2022)
> Updated: 2026-05-28