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Simpson MegaShot MS61084 Gas Pressure Washer review

A 50-state compliant residential gas pressure washer with a Kohler SH270 engine and an axial cam pump.

By the Comredix review desk · Updated November 14, 2026

Quality (40%)
9.0
Experience (25%)
7.0
Value (35%)
7.2

The Simpson MegaShot MS61084 matches the DeWalt's 3400 PSI and 2.5 GPM rating with a Kohler SH270 engine that Simpson lists as 50-state compliant, so it is the gas pick for California buyers. Simpson pitches the MegaShot line at do-it-yourselfers cleaning decks, patios, siding and prepping exteriors for paint. The OEM Technologies axial cam pump is maintenance-free with a thermal relief valve to prevent overheating. The 25 ft MorFlex hose resists kinks and abrasion and has a non-marring polyurethane jacket, and five quick-connect tips cover 0°, 15°, 25°, 40° and soap. A welded, powder-coated steel frame rides on 10 in pneumatic tires. Warranty terms are 3 years on the engine, 1 year on the pump and 5 years on the frame. At 64 lbs it is the heaviest washer here, the hose is half the length of the DeWalt's, and Simpson lists no price, so pricing is pending. The online model number is MS61085.

Who it is for

heavy cleaning in states with strict emissions rules

Price

See vendor pricing (USD check pending).

US price check pending. See the vendor pricing page.

Key features

  • 3400 PSI at 2.5 GPM
  • Kohler SH270 engine, 50-state compliant
  • OEM Technologies axial cam pump with thermal relief valve
  • 25 ft MorFlex hose with a non-marring polyurethane jacket
  • Five quick-connect tips: 0°, 15°, 25°, 40° and soap

Strengths and weaknesses

  • Strength: 50-state compliant, unlike the DeWalt
  • Strength: Five tips, the most on any gas model here
  • Strength: 3-year limited engine warranty and 5-year frame warranty
  • Weakness: Heaviest washer on this list at 64 lbs
  • Weakness: 1-year limited pump warranty
  • Weakness: Simpson lists no price on its site and sends buyers to dealers

Key facts

  • Pressure: 3400 PSI
  • Flow: 2.5 GPM
  • Engine: Kohler SH270, 50-state compliant
  • Weight: 64 lb
  • Hose: 25 ft MorFlex
  • Warranty: 3 yr engine, 1 yr pump, 5 yr frame

Where it ranks

Simpson MegaShot MS61084 Gas Pressure Washer is No. 8 in our Best Pressure Washers verdict.

Alternatives we scored

Visit simpsoncleaning.com · Questions or corrections: editorial@comredix.com