Boats cost and cost and cost!! Yesterday I found oil in the fresh water cooling system of Treks engine motor making it look quite black. Theres no water in the sump oil though.

Also although theres plenty of water coming through saltwater system its cold coming out stern exhaust indicating maybe heat exchanger is blocked somehow as well.

Its pity because motor starts instantly and runs great.

Unless Im jumping to conclusions I think I need the engine stripped down, source of oil leaking into fresh water loop fixed, then rebuilt.

Suggestions for someone competent and trustworthy in or near Sydney who could do that much appreciated!