VP's contact us page states the following:
Your authorized Volvo Penta dealer is your primary contact for service, product information and Volvo Penta Genuine Parts and Accessories. Your Volvo Penta dealer has a special interest in your satisfaction and should be consulted first if you have any questions or concerns regarding your Volvo Penta product.
Please remember that most customer service inquires can only be handled by your local Volvo Penta dealer who is familiar with your product and your area. We have found that speaking in person with a trained professional eliminates misunderstandings that are commonly encountered with e-mail communication. We also know that situations can be resolved more quickly when all the relevant facts, events and details are discussed in a thorough manner. Customer service inquiries usually involve documents that cannot be handled effectively via e-mail. Therefore, questions that cannot be answered by the website FAQs or your local dealer should be submitted via U.S. mail.
Write to us at:
Volvo Penta of the Americas, Inc.
Consumer Relations Support
1300 Volvo Penta Drive
Chesapeake, VA 23320
To locate your nearest dealer:
Use our dealer locator.
http://www.volvopenta.com/volvopenta/na/en-us/applications/contact_us/Pages/contact_us.aspx