Reply To: Dufour 34 e Volvo D130 black smoke from Exhaust

Kevin and Jane Remmington

    The exhaust elbow issue is very common. The exhaust gases mix with the cooling water and solidify over time !

    Had this problem twice on my previous boat with had the Volvo 2020 engine on a Moody. The MOA forum is full of similar problems. One reply suggested brick acid as a cleaner, but be careful !

    So clean or replace.

    The other suggestion is to use the engine more often/longer and get up to temp to burn off the deposited !