Kidde Mariner 5 BC Fire Extinguisher with Gauge
- Brand:
- Kidde
- Part no:
- 466635MTLK
Image: freeportmarine.com
Where to buy
The Kidde Mariner 5 is a fire extinguisher designed for watercraft use, with an easy-to-read gauge and an easy-to-pull safety pin. The cylinder is aluminum and the operating pressure is 100 psi. The USCG approval is given as yes with a mounting bracket, so plan to mount it in its bracket. Kidde backs it with a 6-year limited warranty.
Our take
The USCG approval is listed as yes with mounting bracket, so treat the bracket as part of the setup rather than an extra. The easy-to-read gauge makes a quick pressure check simple, against an operating pressure of 100 psi.
From our buying guide
Powered boats with permanently installed fuel tanks, or spaces where fuel vapors can be trapped, must carry them in a number set by length. The Coast Guard's FAQ says a 10-B counts only as one 5-B, even though it contains more agent.
Check before you buy:
- The label on the bottle states 'Marine Type USCG Approved'.
- The date on a disposable leaves it plenty of life, since the Coast Guard's FAQ says it is expired once it is more than 12 years old.
- It comes with its bracket, since makers tie the approval to it.

