8.1 horizon

Ahoy, New to forum, seeking help with an 8.1 in a SeaRay 370. In the process of diagnosing suspected faulty injector number one on port engine (physically swapping injector one with neighboring injector three, to see if fault follows), I encountered a fuel leak at the fuel rail/supply quick...

So I had new pumps put on last week. They ran great before so it was more of a maintenance decision. With old pumps the temp would be around 158 while cruising. When I came off plane they would maybe hit 162-164 for a few mins and then settle down to 158, all normal. With new pumps I’m now...

Hi everyone, my starboard 8.1s horizon engine has been acting strange on my 01 380DA. I'll turn on the batteries and a few minutes later I'll hear the systems monitor beep, with a message about a starboard engine issue. At the same time, the starboard engine fuel pump will activate for 2-3...

Greetings, Has anybody tried after market exhaust manifolds and risers? I have a 2005 340 with 8.1 and it looks like it's time to replace them. Just wondering about the possible options available. All the best,

Splashed the boat today. I was looking forward to having both engines operate at the same WOT now that the props have been redone, but... :smt089 The stb engine still lags behind the port engine (like last year). Both are the same until around 2000 rpm, then to keep the engines sync'd more...