Found this on the C36 website:
IMPORTANT!
An important message for all Catalina 36 owners:
On November 7, 2002, I spoke personally with Gerry Douglas of Catalina Yachts. A problem was discovered by Westerbeke that concerns many M35B engines - a problem which could cause cam shaft failure.
Once the problem was discovered, Westerbeke/Universal came out with directions on how to check and how to add a 'cam sleeve' to the raw water pump to fix the problem. It's a relatively simple fix, and Westerbeke/Universal will sent owners of all M36B engines the cam sleeve and directions at no charge.
Unfortunately, it's not possible for Catalina to tell exactly which boats, by hull number, are affected. Therefore, Gerry Douglas asked that the Catalina 36 International Association help Catalina Yachts get this word out to Catalina owners with potentially affected engines.
Owners of all Catalinas with the M25XP or the M35B engines (this includes Catalina 28, 30, 320, 34, and 36) are asked to review the service bulletin (click on the graph image below) and check your boat engines to make sure a cam sleeve is in place behind the raw water pump. Steps on getting a cam sleeve (at no cost) from Westerbeke are in the service bulletin.
Further, for C36 owners, after you check you engine, would you please email the C36IA webmaster (
dstovall@gci.net) and give (1) your hull number, (2) and whether the sleeve was found or was missing. If you discovered this problem after suffering engine damage, please let us know. The association will collect M35B information and post data on this website to assist other owners, and to assess the magnitude of the problem.
Both Catalina Yachts and your C36IA want to see this concern checked and corrected as quickly as possible.
- Phil Rojas
Commodore
Catalina 36 International Association
Universal/Westerbeke Service Bulletin 235
Problems with water pumps on the X25 and M35 engines may cause camshaft failure -
You can get to the site using the following:
http://www.catalina36.org/home.htm It includes the picture of the old and new parts.