Mercury 1500 no acceleration

[fisheyedtim]

I have an older mercury, 77 model. Engine runs good with water hose attached, revs fine. When we put it in the lake, we cant get above a fast idle with the throttle wide open. I have two fuel pumps and three carbs, the carbs were rebuilt installed new fuel lines but I'm not 100% sure the fuel lines are installed correctly. Engine has no miss, just will not take fuel on the water.

 

[Hooty]

Re: Mercury 1500 no acceleration

Hey Big Tim,<br />How's everything in Flat Gap? A bunch of my people are buried in Orchard Gap, but that's here in Texas.<br /><br />Get yourself a squirt bottle and put some premix in it. When you're trying to acclerate and the engine is falling on its face, give the carbs a shot of fuel. If it picks up, you'll know ya got a fuel problem for sure. If it picks up when you squirt the top carb, you'll know that's the culprit. Middle carb, etc. Give that a try and see what happens. Lettus know<br /><br />g'luck & c/6<br /><br />Hooty

 

[mellowyellow]

Re: Mercury 1500 no acceleration

may want to install new fuel pump diaphrams while yur at it also.<br />good luck,<br />M.Y.