Motor stops under power

[rob6868]

Hello, fellow boaters. I have a 2008 mercury 4stroke 20hp outboard motor that when im on the lake ill increase to full throttle and after about 15-20 secs it just dies on me or when i troll @ 1.5 it dies after about 3mins. I know it seems to be a fuel issue. but unsure whats causing it. I removed the fuel pressure regulator prior to this starting happening on advice i was told there junk and unnecessary. Does that sound right? Its between the gas tank and motor. Any suggestions? And does it take a certain type off fuel regulator or one size fits all? Would really appreciate some advice. Thank you

 

[Texasmark]

Hello, fellow boaters. I have a 2008 mercury 4stroke 20hp outboard motor that when im on the lake ill increase to full throttle and after about 15-20 secs it just dies on me or when i troll @ 1.5 it dies after about 3mins. I know it seems to be a fuel issue. but unsure whats causing it. I removed the fuel pressure regulator prior to this starting happening on advice i was told there junk and unnecessary. Does that sound right? Its between the gas tank and motor. Any suggestions? And does it take a certain type off fuel regulator or one size fits all? Would really appreciate some advice. Thank you

Is your fuel tank vented....is it functioning properly? I assume you have a squeeze bulb on the fuel line. What does it feel like when the engine dies?
Have you tried to squeeze it to prime the engine when it falters?

 

[rob6868]

The bulb and line are brand new. When i sqeeze the bulb at first start up it does not feel like the bulb is filling up with fuel.

 

[dingbat]

The bulb and line are brand new. When i sqeeze the bulb at first start up it does not feel like the bulb is filling up with fuel.

Installed with the arrows in the right direction?

Holding the ball vertical while pumping?

 

[rob6868]

Installed with the arrows in the right direction?

Holding the ball vertical while pumping?

Correction, the bulb is full just checked it.

 

[rob6868]

And it when it dies it does start back up if that helps

 

[chrisgt]

If you continuously squeeze the bulb while the engine is running does it still stall?

 

[rob6868]

I ended up taking the carb off and using a sonic cleaner (got it at harbor freight) changed plugs they fouled. Runs great, except it's hard to start when its cold

 

[chrisgt]

I ended up taking the carb off and using a sonic cleaner (got it at harbor freight) changed plugs they fouled. Runs great, except it's hard to start when its cold

hard to start cold is likely that you either have your idle mixture too lean or something wrong in the priming circuit. This has a priming build that feeds off the bottom of the carb, right? You need to squeeze the ball to fill the carb before using that primer.