Kidde Mariner KD57W-5BC PWC Fire Extinguisher
- Quick And Powerful: Discharge time of 8-12 seconds, a discharge range of 6-8 feet
- 12x More Corrosion Resistance: Engineered using durable aluminum and stainless steel components
- All-metal Construction: Metal valve assembly, rust, and impact-resistant stainless-steel lever & easy pull safety pin
- Combats Marine Fires: Stop basic fires common to boats: flammable liquids and gases (Class B) & electrical equipment (Class C)
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A corrosion-resistant, Coast Guard approved extinguisher sized specifically for personal watercraft, backed by a longer warranty than most units in its class.
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ASIN: B07YYXP3G9Model: KD57W-5BCCategory: Fire Extinguishers
Overview
The Kidde Mariner KD57W-5BC is a 5-B:C rated dry chemical fire extinguisher sized for personal watercraft, built from aluminum and stainless steel for resistance to marine corrosion.
At 5-B:C it is rated for small flammable liquid and electrical fires, the scale suited to a jet ski rather than the wood and paper coverage a larger boat extinguisher carries. Kidde specs a discharge of 8 to 12 seconds over a 6 to 8 foot range, and the stainless lever and aluminum body aim to outlast plain steel hardware in salt spray and humidity.
- 5-B:C rated for personal watercraft
- Aluminum and stainless steel corrosion resistance
- 8 to 12 second discharge over 6 to 8 feet
- Coast Guard approved, UL approved bracket included
Who it's for
Jet ski and PWC owners who need a compact, Coast Guard approved extinguisher sized for their craft. Owners of larger boats needing broader wood and paper coverage should look at a bigger rated unit instead.
Pros and cons
- Compact 5-B:C rating sized for PWC use
- Aluminum and stainless steel resist marine corrosion
- Coast Guard approved with UL approved bracket included
- 12-year limited warranty
- 5-B:C only covers liquid and electrical fires, not wood or paper
- Shorter discharge range than larger marine units
- Single use, not a refillable unit
Performance notes
The unit discharges sodium bicarbonate dry chemical that interrupts the fire's chemical reaction on contact, with Kidde's spec sheet listing 8 to 12 seconds of discharge over roughly 6 to 8 feet, enough range to fight a small onboard fire from a safe distance. The pressure gauge reads green when charged, and the aluminum and stainless build resists the corrosion that steel hardware suffers in salt water.
Specifications
| Brand | Kidde |
|---|---|
| Model | KD57W-5BC |
| Power & efficiency | |
| Quick And Powerful | Discharge time of 8-12 seconds, a discharge range of 6-8 feet |
| Construction & materials | |
| All-metal Construction | Metal valve assembly, rust, and impact-resistant stainless-steel lever & easy pull safety pin |
| Other details | |
| 12x More Corrosion Resistance | Engineered using durable aluminum and stainless steel components |
| Combats Marine Fires | Stop basic fires common to boats: flammable liquids and gases (Class B) & electrical equipment (Class C) |
| Easy-to-read Pressure Indicator | If arrow is in the green it’s charged |
| Scan Qr Code | Provides quick access to online registration, warranty, and product info |
Frequently asked questions
Is the Kidde KD57W-5BC rated for a boat or just a jet ski?
It is a 5-B:C rated unit sized specifically for personal watercraft such as jet skis, covering small flammable liquid and electrical fires.
How long does it discharge?
Kidde lists a discharge time of 8 to 12 seconds over a range of about 6 to 8 feet.
Does it come with a mount?
Yes, it includes a UL approved plastic strap bracket.