I have a FourWinns U19 with the Ford SHO 5.8 and a Volvo SX Duo Prop. It has run faultlessly until the last couple of times out. It feels like an injector is stuck open, and fuel is visible in the exhaust water. At 3/4 throttle and up it runs strong, and below that runs on 7 cylinders. To my knowledge I have not run Ethanol but that is a problem we are all facing so it is possible. So will fuel injector cleaner sort this out, or is there the likely hood of something more serious? Being a marine surveyor I'll be able to get hold of service manuals, but time (age) may be a contributing factor.
If you want to see the boat run, here is a video clip. It starts off at an 1800 rpm cruise with a 4800 rpm blast.
http://www.youtube.com/watch?v=OuJkSCZwud4
UPDATE The fuel injectors are off, and it has one that appears to be leaking. Four injectors have been replaced by someone prior to me, and we are changing up the last 4 OEM ones. Hopefully this will get this handled.
If you want to see the boat run, here is a video clip. It starts off at an 1800 rpm cruise with a 4800 rpm blast.
http://www.youtube.com/watch?v=OuJkSCZwud4
UPDATE The fuel injectors are off, and it has one that appears to be leaking. Four injectors have been replaced by someone prior to me, and we are changing up the last 4 OEM ones. Hopefully this will get this handled.