(a) Warranties imposed by this subpart shall be phased in according to the following schedule.

(1) For model years 1998-2000, and for MY 1997 engine families certified pursuant to §91.205, all emission related components shall be warranted for a period of one year of engine use.

(2) For model years 2001-2003:

(i) Emission related components shall be warranted for a period of one year of engine use.

(ii) Specified major emission control components shall be warranted for a period of three years or 200 hours of engine use, whichever occurs first.

(3) For model years 2004 and beyond:

(i) Emission-related components shall be warranted for a period of two years or 200 hours of engine use, whichever occurs first.

(ii) Specified major emission control components shall be warranted for a period of three years or 200 hours of engine use, whichever occurs first.

(b) The manufacturer of each new marine SI engine must warrant to the ultimate purchaser and each subsequent purchaser, that the engine is designed, built, and equipped so as to conform at the time of sale with applicable regulations under section 213 of the Act, and the engine is free from defects in materials and workmanship which cause such engine to fail to conform with applicable regulations for its warranty period.

(c) In the case of a marine SI engine part, the manufacturer or rebuilder of the part may certify according to §85.2112 ot this chapter that use of the part will not result in a failure of the engine to comply with emission standards promulgated in this part.

(d) For the purposes of this section, the owner of any marine SI engine warranted under this part is responsible for the proper maintenance of the engine as stated in the manufacturer's written instructions. Proper maintenance generally includes replacement and service, at the owner's expense at a service establishment or facility of the owner's choosing, such items as spark plugs, points, condensers, and any other part, item, or device related to emission control (but not designed for emission control) under the terms of the last sentence of section 207(a)(3) of the Act, unless such part, item, or device is covered by any warranty not mandated by this Act.