Merc 50 engine won't stay running

[mabrown]

Hi all,

I'm attempting to start my 2005 Merc 50 4 stroke and it will run for about 2-5 seconds then just cut out. Does anyone have any suggestions as to what could be the problem?

Thanks
M.A.Brown
USN Vet

[curtiscapk]

1. Is your vent opened on your tank? 2. Clogged fuel filter? 3. Dirty Carbs?

[NonHyphenAmerican]

Gunked up gas?

[LongLakeLegacy]

Did you put sea foam or stabilizer through it in the fall?

[dunny961]

Not sure if this will help but my 90 Merc had a bad fuel level sensor in the fuel pump housing that made it flood out. It mostly would just run a few seconds and die. If you could ever give it some throttle before it died, it would run at wot. But it would never idle.

[Capt Sully]

All the above, I would check