1995 mercury 225 3.0L Offshore

tsawwassenbay

Recruit
Joined
Feb 27, 2015
Messages
4
This engine starts up and idles easily, also runs at slows speeds no problem. When powering up to approx. 3000- 3500 rpm. will run perfectly for approx. 1 minute and then will die completely. Waiting 30 seconds the engine will restart no problem, run at slower speeds okay. If I take engine back up to higher rpm it will run okay for about 30 seconds and completely die. This same scenario repeated on 4 different days. Any ideas?
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,589
When it shuts off is it like you turn key off or does it loose rpm and die???
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,589
Have someone pump the bulb when planning off it it runs fine rebuild the fuel pump. Also check to see if it has a anti siphon valve in tank. Where fuel line attaches to tank if hose barb is aluminum it a anti siphon so remove it and replace with std hose barb.
 
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