Most financial advisors want to help their clients generate reliable income after retirement, but product options and clients' unrealistic expectations keep them from being successful, according to a new survey of U.S. advisors by Russell Investments.

Seventy-two percent of the advisors surveyed for the Financial Professional Outlook (FPO) said that retirement income planning is either a large or core part of their practice, and another 23 percent said it was a small, but regular, component of their business.

 More than 98 percent of survey respondents said they are trying to learn more about retirement income planning and strategies to build expertise in retirement income planning. They also indicated that there was no consensus on the right resources to consult, but 68 percent said they read books and online material; 52 percent consulted with industry peers; 49 percent went to fund companies; and 45 percent took accredited courses.