florida mark
New member
I'm new to the forum and thanks for allowing me to be in here!
So I recently bought a pontoon boat, 2019, and it came with a 2019 mercury 50hp 4 stroke. And honestly it's been a nightmare... I have not even got to use it yet. Basically, it idols pretty good, little shaky. But as soon as I try to give it any kind of gas with the throttle, it just stalls out. Here's everything i've changed out.. I'm basically just doing process of elimination and reading some of the posts on this forum. I have installed new fuel filters, both the water separator one and then the other one, that's hidden down low. I put a new spark plugs, i've installed a new low pressure fuel pump, I have rebuilt the VST with new high pressure fuel pump, new screen filter at the bottom of pump, and new regulator, i cleaned the little screen thing on the bottom of the regulator, new gasket on the VST, new O ring on regulator, new fuel demand valve on fuel tank, drained old fuel with transfer pump, put new ethanol free fuel, new primer bulb.. you name it, it's been replaced with new OEM parts in the last week. It starts right up. No problem. I got great water pressure, where it's peeing. But as soon as I push the throttle forward, it just conks out... I'm just coming to you guys to hopefully give me some pointers on what else is left? I've also changed out the fuel lines from the old gray fuel line that had the clear plastic inside, all of that's been changed out.
So I recently bought a pontoon boat, 2019, and it came with a 2019 mercury 50hp 4 stroke. And honestly it's been a nightmare... I have not even got to use it yet. Basically, it idols pretty good, little shaky. But as soon as I try to give it any kind of gas with the throttle, it just stalls out. Here's everything i've changed out.. I'm basically just doing process of elimination and reading some of the posts on this forum. I have installed new fuel filters, both the water separator one and then the other one, that's hidden down low. I put a new spark plugs, i've installed a new low pressure fuel pump, I have rebuilt the VST with new high pressure fuel pump, new screen filter at the bottom of pump, and new regulator, i cleaned the little screen thing on the bottom of the regulator, new gasket on the VST, new O ring on regulator, new fuel demand valve on fuel tank, drained old fuel with transfer pump, put new ethanol free fuel, new primer bulb.. you name it, it's been replaced with new OEM parts in the last week. It starts right up. No problem. I got great water pressure, where it's peeing. But as soon as I push the throttle forward, it just conks out... I'm just coming to you guys to hopefully give me some pointers on what else is left? I've also changed out the fuel lines from the old gray fuel line that had the clear plastic inside, all of that's been changed out.