---
kind: "section"
citation: "40 C.F.R. § 1700.33"
title: "40"
number: "1700.33"
heading: "Small boat engine wet exhaust."
url: "https://uscodex.org/cfr/40/1700.33"
---

# §1700.33. Small boat engine wet exhaust.

- (a) For the purposes of this section small boat engine wet exhaust discharges refers only to discharges from vessels that are less than 79 feet in length.
- (b) Vessels generating small boat engine wet exhaust must be maintained in good operating order, well-tuned, and functioning according to manufacturer specifications, in order to decrease pollutant concentrations and volumes in small boat engine wet exhaust.
- (c) To the greatest extent practicable, low sulfur or alternative fuels must be used to reduce the concentration of pollutants in discharges from small boat engine wet exhaust.
- (d) To the greatest extent practicable, use four-stroke engines instead of two-stroke engines for vessels generating small boat engine wet exhaust.
- (e) Vessels using two-stroke engines must use environmentally acceptable lubricants unless use of such lubricants is technologically infeasible. If technologically infeasible, the use and justification for the use of a non-environmentally acceptable lubricant must be recorded in the vessel recordkeeping documentation.

## Notes

### Source

Source: 82 3183, Jan. 11, 2017, unless otherwise noted.

### Authority

Authority: 33 U.S.C. 1322, 1361.

### Source

Source: 64 FR 25134, May 10, 1999, unless otherwise noted.