Sea Trialing a Pair of Yamaha 350s Who is this masked man, with the Yamaha cap? It’s Dennis, of course, our outboard mechanic and systems tech, wearing his GIBY-issued buff – perfect for a spring sea trial aboard a Albury Brothers 33. The twin 350s push the boat along nicely, topping out at around 43 knots! Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.