Phillip writes: <<I have 1979 Perkins 4-108 that I recently had to rebuild. All parts were easy to get but it is a different engine... parts are all expensive:)>> I'm just curious but I know several boat owners, including myself, who are contimplating rebuilding a Perkins 4-107 or 4-108. Roughly how many boat bucks did it cost? The alternative is replacing with a similarly sized Yanmar. Larry Z