Exhibit 31.2



                        POLARIS AIRCRAFT INCOME FUND II,
                        A California Limited Partnership


                             Quarterly Certification


I, Stephen E. Yost, certify that:


1. I have reviewed this quarterly report on Form 10-Q of Polaris Aircraft Income
Fund II (A California Limited Partnership);


2. Based on my knowledge, this report does not contain any untrue statement of a
material fact or omit to state a material fact  necessary to make the statements
made, in light of the  circumstances  under which such statements were made, not
misleading with respect to the period covered by this report;


3.  Based  on my  knowledge,  the  financial  statements,  and  other  financial
information included in this report, fairly present in all material respects the
financial  condition,  results of operations and cash flows of the registrant as
of, and for, the periods presented in this report;


4. The  registrant's  other  certifying  officer(s)  and I are  responsible  for
establishing and maintaining  disclosure  controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and we have:


a) Designed such disclosure  controls and procedures,  or caused such disclosure
controls and  procedures to be designed  under our  supervision,  to ensure that
material information  relating to the registrant,  is made known to us by others
within the entity,  particularly during the period in which this report is being
prepared;


b) Evaluated  the  effectiveness  of the  registrant's  disclosure  controls and
procedures and presented in this report our conclusions  about the effectiveness
of the disclosure controls and procedures as of the end of the period covered by
this report based on such evaluation; and


c) Disclosed in this report any change in the registrant's internal control over
financial  reporting that occurred  during the  registrant's  most recent fiscal
quarter that has  materially  affected,  or is  reasonably  likely to materially
affect, the registrant's internal control over financial reporting; and


5. The registrant's other certifying  officer(s) and I have disclosed,  based on
our most recent evaluation of internal control over financial reporting,  to the
registrant's  auditors  and the audit  committee  of the  registrant's  board of
directors (or persons performing the equivalent functions):


a) All  significant  deficiencies  and  material  weaknesses  in the  design  or
operation of internal  control over  financial  reporting  which are  reasonably
likely  to  adversely  affect  the  registrant's  ability  to  record,  process,
summarize and report financial information; and


b) Any  fraud,  whether  or not  material,  that  involves  management  or other
employees who have a significant role in the registrant's  internal control over
financial reporting.


Date:  November 15, 2004
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By:    Polaris Investment Management Corporation
       General Partner

/s/ Stephen E. Yost
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Stephen E. Yost
Chief Financial Officer