RCW 46.12.590: Procedure on installation of new or different motor—Penalty.

(1) A person shall apply for a new certificate of title for any motor vehicle registered by its motor number when:

(a) A new or different motor has been installed; and

(b) The most recent certificate of title issued for the motor vehicle has recorded on it the previous motor number.

(2) The application for a new certificate of title required in subsection (1) of this section must:

(a) Be made within five days after installation of the new motor;

(b) Be made by the owner or owner's authorized representative to the department, county auditor or other agent, or subagent;

(c) Require the most recent certificate of title to be returned to the department;

(d) Include a statement of the disposition of the former motor; and

(e) Include the fee required under RCW 46.17.100 in addition to any other fee or tax required by law.

(3) A person who possesses a certificate of title that shows the previous motor number for a motor vehicle in which a new or different motor has been installed, after five days following the installation of the new motor, is in violation of this chapter. A violation of this section constitutes a misdemeanor.