# MK-303 - KOHLER/REHLKO AEGIS 30HP EFI ENGINE MAINTENANCE KIT

MK-303 - KOHLER/REHLKO AEGIS 30HP EFI ENGINE MAINTENANCE KIT

Engine maintenance kit for the Kohler/Rehlko Aegis v-twin liquid-cooled EFI 30hp engines.  
  
LH775  
ELH775  
  
  
Engine Info:  
  Capacity:  1.9 liters / 2.0 quarts (64 fl oz.) - w/ filter change  
  Oil Type:  Cold climate 5w-30 - Full Synthetic    Warm climate: 10w-30 - Full Synthetic  
  Spark Plug Gap:  .03" / 0.76mm  
  
  
Argo Transmission Capacity/Type:  
  Gen II/Classic:  1.1liters / 1.16 quarts (37.1 fl oz) - 75w-90 Full Synthetic GL5 rated.  
  Admiral:  1.2 liters / 1.27 quarts (40.6 fl oz) - 75w-90 Full Synthetic GL5 rated.  
  
  
Fits Argo XTV Models:

Aurora 800 8x8 (2019 Only)  
Aurora 800 Huntmaster 8x8 (2019 only)  
Avenger S, ST, STR, STX, XT 8x8  
Avenger 750 EFI 8x8  
Avenger 750 Huntmaster 8x8 (2015-2019)  
Avenger 800 / Pro Responder 8x8 (2019 Only)  
Bigfoot MX6 (2018-2019)  
Bigfoot MX8 (2018-2019)  
Conquest Pro 800 XT, XTL, XTX 8x8 (2018-2020)  
Conquest 800 Outfitter 8x8 (2018-2020)  
HDI 750 6x6  
HDI 750 8x8  
HDI SE 8x8  
Outfitter 8x8 2015-2017)  
XTI 8x8  
  
  
Kit Contains:  
  
(1) 25 083 01-S  OEM MAIN FILTER  
(1) 25 083 04-S  OEM PRE-FILTER  
(1) 12 050 01-S  OEM OIL FILTER  
(1) F5002  BOSCH FUEL FILTER  
(2) RC14YC  CHAMPION 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:** 113.42 USD
- **Vendor:** KOHLER / REHLKO
- **Tags:** Argo Parts, Kohler Engine Parts, OEM Parts

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 113.42 USD | In stock |

## Images

- MK-303 - KOHLER/REHLKO AEGIS 30HP EFI ENGINE MAINTENANCE KIT
- Kohler / Rehlko Genuine Parts and Accessories

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> Source: [Doc's Full Bore Outdoor](https://parts.docsfullboreoutdoor.com/products/mk-303-kohler-rhelko-aegis-30hp-efi-engine-maintenance-kit)
> Updated: 2026-06-01