2b575473
took boat out yesterday after a few weeks and when I opened it up to wot it would bog down and lose power, haven’t called mercury yet will do so Monday, just wondering if anyone else experienced this and what might be the cause, no alarms sound or anything else it runs fine 1/2-3/4 throttle but when you give it wot it Boggs and loses power
Now it is worse, basically once it gets up around 4500 rpm it starts to bogg, basically feels like your hitting a mud flat with your boat, I think it’s a computer issue
New boat, or repower?
Fuel filter? Water in fuel? Collapsed fuel line?
Have you confirmed through a dealer with their CDS laptop that your throttle is opening 100%?
Yes brand new 2019 Phoenix, got 40hrs on motor, had 20hr services done also had dealer check throttle, this is the first tine doing it since I had the boat, always pump non ethanol fuel, don’t think it’s a bad gas issue it only does it at wot, also seems like my rpm gauge which is a Merc monitor is jump rpm more then it should
Mine starts about 5000 rpm if you full throttle and will bogg until I left off gas and back it down to about 4500, the motor just started doing this this weekend, dang shame brand new boat and new Merc 4s and I’m dealing with this, I got some bad luck sometimesOriginally Posted by Scottw
Is the primer bulb installed in the fuel line?
Not sure, brand new boat I’ll check it out
im 45 minutes from Baton Rouge
Let us know if we can help out. Better hurry though. We will be closing late next week for the holidays and will be leaving early some days after woodcock season starts on the 18th.
We have a customer who brings his Verados all the way to us from Ardmore, OK and another from the Tulsa/Grand Lake area. They ran into the same problem up there, ‘techs’ just throwing parts at their issue without any resolution. Good luck and let us know if we can help out.
Update, so brought to my dealer where I’ve taken all my motor work forever, I cleared it with mercury also, he seams to think it’s restricted fuel supply but mercury made me go pick up the boat and take it somewhere else because my dealer wasn’t a platinum service dealer, which I think is total bs because I’ve been using this mechanic for years and trust him against some 20 yr old kid any day, but that’s where I stand right now, should know more tomorrow
Did you check to see if there is a primer bulb in your fuel line?
There is no primer bulb on the boat for the new fourstroke or Vera do’s from what I was told
Correct. There is not supposed to be a primer bulb in the fuel line. Did you check it? Trust no one...
Yes no primer bulb
Was thinking about this and I know there is fuel demand valve on the fuel tank of new fuel systems. Could be this valve is not allowing enough fuel in causing fuel starvation. A restriction of the fuel line could also do this. Just a thought
Possible... but there should be an FDV (just not a primer valve). Applies to all current 75 or higher hp Mercury Fourstrokes.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Verify whether you have a pressurized system (commonly found in boats Jan 1, 2011 or later). If you do, there should be a FDV (Fuel Demand Valve).
If you need to discuss further, let's open a separate thread to avoid confusion.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Update: mechanic water tested boat today and felt the bogg ay wot, definitely thinks it’s fuel related but not sure what, could be blockage or worse something in the fuel system not working right, hopefully this issue gets worked out soon
Hopefully something simple like a restricted filter (supply line, main filter, fuel rail filter).
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Have they tried hooking up a portable fuel tank in order to isolate the issue to either the boat or the engine?
